Copy library to each example sub folder
Instead of using a symbolic link, which doesn't allow for per-example configuration, copy the entire library to each example sub folder. Signed-off-by: Collin J. Doering <collin.doering@rekahsoft.ca>
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../../ansi_escapes.h
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/**
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* (C) Copyright Collin J. Doering 2015
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file ansi_escapes.h
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* @author Collin J. Doering <collin.doering@rekahsoft.ca>
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* @date Oct 9, 2015
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* @brief Macros to ease writing ANSI escapes.
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*/
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#define CSI "\e[" ///< Control Sequence Introducer
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#define CUU(n) CSI #n "A" ///< Cursor up
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#define CUD(n) CSI #n "B" ///< Cursor down
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#define CUF(n) CSI #n "C" ///< Cursor forward
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#define CUB(n) CSI #n "D" ///< Cursor backward
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#define CNL(n) CSI #n "E" ///< Cursor next line
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#define CPL(n) CSI #n "F" ///< Cursor previous line
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#define CHA(n) CSI #n "G" ///< Cursor horizontal absolute
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#define CUP(n,m) CSI #n ";" #m "H" ///< Cursor position
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#define ED(n) CSI #n "J" ///< Erase display
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#define EL(n) CSI #n "K" ///< Erase in line
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#define SU(n) CSI #n "S" ///< Scroll up
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#define SD(n) CSI #n "T" ///< Scroll down
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#define HVP(n,m) CSI #n ";" #m "f" ///< Horizontal and vertical position
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// #define SGR(n,m) CSI #n #m ///< Select graphic rendition
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#define AUX_ON CSI "5i" ///< AUX port on
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#define AUX_OFF CSI "4i" ///< AUX port off
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// #define DSR CSI "6 n" ///< Device status report
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#define SCP CSI "s" ///< Save cursor position
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#define RCP CSI "u" ///< Restore cursor position
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#define HIDE_CURSOR CSI "?25l" ///< DECTCEM: hide cursor
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#define SHOW_CURSOR CSI "?25h" ///< DECTCEM: show cursor
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../../lcdLib.c
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/**
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* (C) Copyright Collin J. Doering 2015
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* File: lcdLib.c
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* Author: Collin J. Doering <collin.doering@rekahsoft.ca>
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* Date: Sep 29, 2015
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*/
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// Includes -----------------------------------------------------------------------------------
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#include <math.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "lcdLib.h"
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//---------------------------------------------------------------------------------------------
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// Static global variables
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static volatile uint8_t currentLineNum;
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static volatile uint8_t currentLineChars;
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static volatile uint8_t saveCursorLineNum;
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static volatile uint8_t saveCursorLineChars;
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static volatile uint8_t lcdState;
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static const uint8_t lineBeginnings[LCD_NUMBER_OF_LINES] = { LCD_LINE_BEGINNINGS };
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//---------------------------------------------------------------------------------------------
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// Static functions
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/*
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Bring LCD_ENABLE line high, wait for LCD_ENABLE_HIGH_DELAY; then bring LCD_ENABLE line low
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and wait for LCD_ENABLE_LOW_DELAY.
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Note: LCD_ENABLE, LCD_ENABLE_HIGH_DELAY, and LCD_ENABLE_LOW_DELAY must be defined in lcdLibConfig.h
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*/
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static void clkLCD(void) {
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LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
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_delay_us(LCD_ENABLE_HIGH_DELAY);
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LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
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_delay_us(LCD_ENABLE_LOW_DELAY);
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}
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/*
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Wait until LCD_BF (busy flag) is cleared (low).
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*/
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static void loop_until_LCD_BF_clear(void) {
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uint8_t bf;
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LCD_RS_PORT &= ~(1 << LCD_RS); // RS=0
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LCD_RW_PORT |= (1 << LCD_RW); // RW=1
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// Set LCD_BF as input
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LCD_DBUS7_DDR &= ~(1 << LCD_BF);
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do {
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bf = 0;
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LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
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_delay_us(1); // 'delay data time' and 'enable pulse width'
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bf |= (LCD_DBUS7_PIN & (1 << LCD_BF));
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LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
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_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
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#ifdef FOUR_BIT_MODE
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LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
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_delay_us(1); // 'delay data time' and 'enable pulse width'
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LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
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_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
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#endif
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} while (bf);
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#if defined (FOUR_BIT_MODE) || defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
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LCD_DBUS7_DDR |= (1 << LCD_DBUS7);
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LCD_DBUS6_DDR |= (1 << LCD_DBUS6);
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LCD_DBUS5_DDR |= (1 << LCD_DBUS5);
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LCD_DBUS4_DDR |= (1 << LCD_DBUS4);
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#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
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LCD_DBUS3_DDR |= (1 << LCD_DBUS3);
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LCD_DBUS2_DDR |= (1 << LCD_DBUS2);
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LCD_DBUS1_DDR |= (1 << LCD_DBUS1);
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LCD_DBUS0_DDR |= (1 << LCD_DBUS0);
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#endif
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#else
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LCD_DBUS_DDR = 0xff; // Reset all LCD_DBUS_PORT pins as outputs
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#endif
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}
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/*
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Given a 8 bit integer, writes the four MSB's (one nibble) to the LCD data bus.
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Note: this is only defined in FOUR_BIT_MODE
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*/
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#ifdef FOUR_BIT_MODE
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static void writeLCDDBusNibble_(uint8_t b) {
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// Reset data lines to zeros
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LCD_DBUS7_PORT &= ~(1 << LCD_DBUS7);
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LCD_DBUS6_PORT &= ~(1 << LCD_DBUS6);
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LCD_DBUS5_PORT &= ~(1 << LCD_DBUS5);
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LCD_DBUS4_PORT &= ~(1 << LCD_DBUS4);
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// Write 1's where appropriate on data lines
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if (b & (1 << 7)) LCD_DBUS7_PORT |= (1 << LCD_DBUS7);
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if (b & (1 << 6)) LCD_DBUS6_PORT |= (1 << LCD_DBUS6);
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if (b & (1 << 5)) LCD_DBUS5_PORT |= (1 << LCD_DBUS5);
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if (b & (1 << 4)) LCD_DBUS4_PORT |= (1 << LCD_DBUS4);
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// Pulse the enable line
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clkLCD();
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}
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#endif
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/*
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Given an 8 bit integer, writes it to the LCD data bus, regardless of its
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configuration (default 8-bit mode, 8-bit arbitrary pin mode and 4-bit mode). In the default
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8-bit mode and EIGHT_BIT_ARBITRARY_PIN_MODE, the given data is written in one cycle using the
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writeLCDDBusByte_ function. In FOUR_BIT_MODE however, the given data is written in two cycles
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using two successive calls to the writeLCDDBusNibble_ function.
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This function does not ensure the LCD is ready to accept new data and thus needs to
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be handled by the caller.
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*/
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static void writeLCDDBusByte_(uint8_t b) {
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#ifdef FOUR_BIT_MODE
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writeLCDDBusNibble_(b);
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writeLCDDBusNibble_(b << 4);
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#elif defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
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// Reset data lines to zeros
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LCD_DBUS7_PORT &= ~(1 << LCD_DBUS7);
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LCD_DBUS6_PORT &= ~(1 << LCD_DBUS6);
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LCD_DBUS5_PORT &= ~(1 << LCD_DBUS5);
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LCD_DBUS4_PORT &= ~(1 << LCD_DBUS4);
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LCD_DBUS3_PORT &= ~(1 << LCD_DBUS3);
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LCD_DBUS2_PORT &= ~(1 << LCD_DBUS2);
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LCD_DBUS1_PORT &= ~(1 << LCD_DBUS1);
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LCD_DBUS0_PORT &= ~(1 << LCD_DBUS0);
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// Write 1's where appropriate on data lines
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if (b & (1 << 7)) LCD_DBUS7_PORT |= (1 << LCD_DBUS7);
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if (b & (1 << 6)) LCD_DBUS6_PORT |= (1 << LCD_DBUS6);
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if (b & (1 << 5)) LCD_DBUS5_PORT |= (1 << LCD_DBUS5);
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if (b & (1 << 4)) LCD_DBUS4_PORT |= (1 << LCD_DBUS4);
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if (b & (1 << 3)) LCD_DBUS3_PORT |= (1 << LCD_DBUS3);
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if (b & (1 << 2)) LCD_DBUS2_PORT |= (1 << LCD_DBUS2);
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if (b & (1 << 1)) LCD_DBUS1_PORT |= (1 << LCD_DBUS1);
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if (b & (1 << 0)) LCD_DBUS0_PORT |= (1 << LCD_DBUS0);
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clkLCD();
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#else
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LCD_DBUS_PORT = b;
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clkLCD();
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#endif
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}
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/*
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Given a 8 bit integer representing a LCD instruction, sends it to the LCD display.
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Sets RS=RW=0 and writes the given 8 bit integer to the LCD databus.
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Note that this function does not ensure the LCD is ready to accept a new instruction and thus
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needs to be handled by the caller.
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*/
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static void writeLCDInstr_(uint8_t instr) {
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LCD_RS_PORT &= ~(1 << LCD_RS); // RS=0
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LCD_RW_PORT &= ~(1 << LCD_RW); // RW=0
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writeLCDDBusByte_(instr);
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}
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/*
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Given a 8 bit integer representing a LCD instruction, waits until the LCD is ready and sends
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the instruction.
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*/
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static inline void writeLCDInstr(uint8_t instr) {
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loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
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writeLCDInstr_(instr);
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}
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/*
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Sets RS=1, RW=0 and accepts a char (8 bit) and outputs it to the current cursor position of
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the LCD. In the default 8-bit mode and EIGHT_BIT_ARBITRARY_PIN_MODE, the given data is
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written in one cycle using the writeLCDDBusByte_ function. In FOUR_BIT_MODE however, the given
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data is written in two cycles using two successive calls to the writeLCDDBusNibble_ function.
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*/
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static void writeCharToLCD_(char c) {
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LCD_RS_PORT |= (1 << LCD_RS); // RS=1
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LCD_RW_PORT &= ~(1 << LCD_RW); // RW=0
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writeLCDDBusByte_(c);
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}
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static uint8_t readLCDDBusByte_(void) {
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LCD_RS_PORT |= (1 << LCD_RS); // RS=1
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LCD_RW_PORT |= (1 << LCD_RW); // RW=1
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LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
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_delay_us(1); // 'delay data time' and 'enable pulse width'
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// Read data
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char c = 0;
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#if defined(FOUR_BIT_MODE)
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if (LCD_DBUS7_PIN & (1 << LCD_DBUS7)) c |= (1 << 7);
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if (LCD_DBUS6_PIN & (1 << LCD_DBUS6)) c |= (1 << 6);
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if (LCD_DBUS5_PIN & (1 << LCD_DBUS5)) c |= (1 << 5);
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if (LCD_DBUS4_PIN & (1 << LCD_DBUS4)) c |= (1 << 4);
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LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
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_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
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LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
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_delay_us(1); // 'delay data time' and 'enable pulse width'
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if (LCD_DBUS7_PIN & (1 << LCD_DBUS7)) c |= (1 << 3);
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if (LCD_DBUS6_PIN & (1 << LCD_DBUS6)) c |= (1 << 2);
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if (LCD_DBUS5_PIN & (1 << LCD_DBUS5)) c |= (1 << 1);
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if (LCD_DBUS4_PIN & (1 << LCD_DBUS4)) c |= (1 << 0);
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#elif defined(EIGHT_BIT_ARBITRARY_PIN_MODE)
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if (LCD_DBUS7_PIN & (1 << LCD_DBUS7)) c |= (1 << 7);
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if (LCD_DBUS6_PIN & (1 << LCD_DBUS6)) c |= (1 << 6);
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if (LCD_DBUS5_PIN & (1 << LCD_DBUS5)) c |= (1 << 5);
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if (LCD_DBUS4_PIN & (1 << LCD_DBUS4)) c |= (1 << 4);
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if (LCD_DBUS3_PIN & (1 << LCD_DBUS3)) c |= (1 << 3);
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if (LCD_DBUS2_PIN & (1 << LCD_DBUS2)) c |= (1 << 2);
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if (LCD_DBUS1_PIN & (1 << LCD_DBUS1)) c |= (1 << 1);
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if (LCD_DBUS0_PIN & (1 << LCD_DBUS0)) c |= (1 << 0);
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#else
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c = LCD_DBUS_PIN;
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#endif
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LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
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_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
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return c;
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}
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/*
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Given a character string, and a uint8_t pointer, reads the character string until a
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non-numerical ASCII character, returning the integer representation of the number read. At
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the end of the functions execution, the found_num uint8_t* will be updated to indicate how
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many digits were read. The new_loc char** will be updated with the new parsing position in
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the string.
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*/
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static uint8_t readASCIINumber(char* str, uint8_t* found_num, char** new_loc) {
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uint8_t nums[3];
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*found_num = 0;
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while (*str != '\0' && *found_num < 3) {
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if (*str >= 0x30 && *str <= 0x39) {
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// Use *str as a number (specified in ASCII)
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nums[(*found_num)++] = *str - 0x30;
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} else {
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break;
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}
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|
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str++;
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||||||
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}
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*new_loc = str;
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uint8_t ret = 0;
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uint8_t i = *found_num - 1;
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for (uint8_t fnd = 0; fnd < *found_num; fnd++)
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ret += nums[fnd] * pow(10, i--);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Set all pins of LCD_DBUS as outputs
|
||||||
|
*/
|
||||||
|
static inline void setLCDDBusAsOutputs(void) {
|
||||||
|
#if defined (FOUR_BIT_MODE) || defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
|
||||||
|
LCD_DBUS7_DDR |= (1 << LCD_DBUS7);
|
||||||
|
LCD_DBUS6_DDR |= (1 << LCD_DBUS6);
|
||||||
|
LCD_DBUS5_DDR |= (1 << LCD_DBUS5);
|
||||||
|
LCD_DBUS4_DDR |= (1 << LCD_DBUS4);
|
||||||
|
#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
|
||||||
|
LCD_DBUS3_DDR |= (1 << LCD_DBUS3);
|
||||||
|
LCD_DBUS2_DDR |= (1 << LCD_DBUS2);
|
||||||
|
LCD_DBUS1_DDR |= (1 << LCD_DBUS1);
|
||||||
|
LCD_DBUS0_DDR |= (1 << LCD_DBUS0);
|
||||||
|
#endif
|
||||||
|
#else
|
||||||
|
LCD_DBUS_DDR = 0xff;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Set all pins of LCD_DBUS as inputs (disabling their output)
|
||||||
|
*/
|
||||||
|
static inline void setLCDDBusAsInputs(void) {
|
||||||
|
#if defined (FOUR_BIT_MODE) || defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
|
||||||
|
LCD_DBUS7_DDR &= ~(1 << LCD_DBUS7);
|
||||||
|
LCD_DBUS6_DDR &= ~(1 << LCD_DBUS6);
|
||||||
|
LCD_DBUS5_DDR &= ~(1 << LCD_DBUS5);
|
||||||
|
LCD_DBUS4_DDR &= ~(1 << LCD_DBUS4);
|
||||||
|
#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
|
||||||
|
LCD_DBUS3_DDR &= ~(1 << LCD_DBUS3);
|
||||||
|
LCD_DBUS2_DDR &= ~(1 << LCD_DBUS2);
|
||||||
|
LCD_DBUS1_DDR &= ~(1 << LCD_DBUS1);
|
||||||
|
LCD_DBUS0_DDR &= ~(1 << LCD_DBUS0);
|
||||||
|
#endif
|
||||||
|
#else
|
||||||
|
LCD_DBUS_DDR = 0;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Set RS=RW=0 and write the CMD_INIT command to the LCD data bus. Note that an appropriate
|
||||||
|
pause must follow before sending new commands to the LCD using writeLCD*_ functions.
|
||||||
|
*/
|
||||||
|
static inline void softwareLCDInitPulse(void) {
|
||||||
|
LCD_RS_PORT &= ~(1 << LCD_RS); // RS=0
|
||||||
|
LCD_RW_PORT &= ~(1 << LCD_RW); // RW=0
|
||||||
|
|
||||||
|
#ifdef FOUR_BIT_MODE
|
||||||
|
writeLCDDBusNibble_(CMD_INIT);
|
||||||
|
#else
|
||||||
|
writeLCDDBusByte_(CMD_INIT);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Library function definitions
|
||||||
|
|
||||||
|
/*
|
||||||
|
Do software initialization as specified by the datasheet
|
||||||
|
*/
|
||||||
|
void initLCD(void) {
|
||||||
|
// Set LCD_RS, LCD_RW and LCD_ENABLE as outputs
|
||||||
|
LCD_RS_DDR |= (1 << LCD_RS);
|
||||||
|
LCD_RW_DDR |= (1 << LCD_RW);
|
||||||
|
LCD_ENABLE_DDR |= (1 << LCD_ENABLE);
|
||||||
|
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
_delay_us(LCD_INIT_DELAY0); // Wait minimum 15ms as per datasheet
|
||||||
|
softwareLCDInitPulse();
|
||||||
|
_delay_us(LCD_INIT_DELAY1); // Wait minimum 4.1ms as per datasheet
|
||||||
|
softwareLCDInitPulse();
|
||||||
|
_delay_us(LCD_INIT_DELAY2); // Wait minimum 100us as per datasheet
|
||||||
|
softwareLCDInitPulse();
|
||||||
|
|
||||||
|
#if defined (FOUR_BIT_MODE)
|
||||||
|
// Function Set (4-bit interface)
|
||||||
|
writeLCDDBusNibble_(CMD_INIT_FOUR_BIT);
|
||||||
|
writeLCDInstr_(CMD_INIT_FOUR_BIT | LCD_LINES | LCD_FONT);
|
||||||
|
#else
|
||||||
|
// Function set (8-bit interface)
|
||||||
|
writeLCDInstr_(INSTR_FUNC_SET | (1 << INSTR_FUNC_SET_DL) | LCD_LINES | LCD_FONT);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* BF now can be checked */
|
||||||
|
|
||||||
|
// Set functions of LCD
|
||||||
|
writeLCDInstr(INSTR_DISPLAY); // Display off
|
||||||
|
|
||||||
|
// Clear display
|
||||||
|
writeLCDInstr(CMD_CLEAR_DISPLAY);
|
||||||
|
|
||||||
|
// Increment mode, no shift
|
||||||
|
writeLCDInstr(INSTR_ENTRY_SET | (1 << INSTR_ENTRY_SET_ID));
|
||||||
|
|
||||||
|
// Display on, cursor on, blink off
|
||||||
|
lcdState = (1 << INSTR_DISPLAY_D) | (1 << INSTR_DISPLAY_C);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Given a single character, checks whether its a ASCII escape and does the following:
|
||||||
|
|
||||||
|
- Newline '\n': moves the cursor to the next physical line of the LCD display; if the cursor is on
|
||||||
|
the last line of the display, clears the display and positions the cursor at the top left
|
||||||
|
of the LCD
|
||||||
|
- Carriage return '\r': moves the cursor to the beginning of the current line
|
||||||
|
- Backspace '\b': moves the cursor one position backwards, wrapping to the end of the
|
||||||
|
previous line when at the beginning of a line (other then the first one). A space is then
|
||||||
|
inserted to replace the character at point, without moving the cursor. When the cursor is
|
||||||
|
at the beginning of the first line, does nothing.
|
||||||
|
- Form feed '\f': clears the LCD display and places the cursor at the beginning of the first line.
|
||||||
|
- Alarm '\a': ignored
|
||||||
|
|
||||||
|
Any other character is sent to the LCD display using writeCharToLCD_.
|
||||||
|
*/
|
||||||
|
void writeCharToLCD(char c) {
|
||||||
|
switch (c) {
|
||||||
|
case '\n': // Line feed
|
||||||
|
if (currentLineNum == LCD_NUMBER_OF_LINES - 1) {
|
||||||
|
scrollUp(1);
|
||||||
|
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[currentLineNum]);
|
||||||
|
} else {
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[++currentLineNum]);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case '\a': // Alarm
|
||||||
|
break;
|
||||||
|
case '\b': // Backspace (non-destructive)
|
||||||
|
if (currentLineChars == 0 && currentLineNum == 0) {
|
||||||
|
// At first line, first column; there is no where to move; do nothing
|
||||||
|
break;
|
||||||
|
} else if (currentLineChars == 0) {
|
||||||
|
// At beginning of line, need to move the end of previous line
|
||||||
|
currentLineChars = LCD_CHARACTERS_PER_LINE - 1;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[--currentLineNum] + currentLineChars));
|
||||||
|
} else {
|
||||||
|
// OK, simply go back one character
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + --currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
break;
|
||||||
|
case '\r': // Carriage return
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[currentLineNum]);
|
||||||
|
currentLineChars = 0;
|
||||||
|
break;
|
||||||
|
case '\f': // Form feed
|
||||||
|
clearDisplay();
|
||||||
|
break;
|
||||||
|
default: // Printable character
|
||||||
|
if (currentLineChars == LCD_CHARACTERS_PER_LINE - 1 && currentLineNum == LCD_NUMBER_OF_LINES - 1) {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
writeCharToLCD_(c);
|
||||||
|
|
||||||
|
scrollUp(1);
|
||||||
|
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[currentLineNum]);
|
||||||
|
} else if (currentLineChars == LCD_CHARACTERS_PER_LINE - 1) {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
writeCharToLCD_(c);
|
||||||
|
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[++currentLineNum]);
|
||||||
|
} else {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
writeCharToLCD_(c);
|
||||||
|
currentLineChars++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void writeStringToLCD(char* str) {
|
||||||
|
while (*str != '\0') {
|
||||||
|
#ifdef LCD_ANSI_ESCAPE_ENABLE
|
||||||
|
// Check for ANSI CSI (Control Sequence Introducer)
|
||||||
|
if (*str == '\e') {
|
||||||
|
if (*(++str) != '\0' && *str == '[') {
|
||||||
|
char* str_ref = ++str;
|
||||||
|
switch (*str) {
|
||||||
|
case 's': // SCP - Save cursor position
|
||||||
|
saveCursorPosition();
|
||||||
|
return;
|
||||||
|
case 'u': // RCP - Restore cursor position
|
||||||
|
restoreCursorPosition();
|
||||||
|
return;
|
||||||
|
case '?': // DECTCEM
|
||||||
|
if (*(++str_ref) != '\0' && *str_ref == '2') {
|
||||||
|
if (*(++str_ref) != '\0' && *str_ref == '5') {
|
||||||
|
if (*(++str_ref) != '\0') {
|
||||||
|
if (*str_ref == 'l') {
|
||||||
|
hideCursor();
|
||||||
|
} else if (*str_ref == 'h') {
|
||||||
|
showCursor();
|
||||||
|
} else {
|
||||||
|
// Invalid escape
|
||||||
|
}
|
||||||
|
} // Invalid escape (early termination)
|
||||||
|
} // Invalid escape
|
||||||
|
} // Invalid escape
|
||||||
|
return;
|
||||||
|
default:
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Read optional variable length number in ASCII (0x30 - 0x3f) where 0x3a - 0x3f are
|
||||||
|
// ignored (they are used as flags by some terminals)
|
||||||
|
uint8_t fnd0;
|
||||||
|
uint8_t num0 = readASCIINumber(str, &fnd0, &str);
|
||||||
|
|
||||||
|
// Read optional (semicolon followed by optional variable length number)
|
||||||
|
uint8_t fnd1;
|
||||||
|
uint8_t num1;
|
||||||
|
if (*str != '\0' && *str == ';') {
|
||||||
|
num1 = readASCIINumber(++str, &fnd1, &str);
|
||||||
|
|
||||||
|
// Read control character (between 0x40 - 0x7e) for two argument sequences
|
||||||
|
switch (*str) {
|
||||||
|
case 'f': // HVP - Horizontal and vertical position
|
||||||
|
case 'H': // CUP - Cursor position
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
num1 = fnd1 ? num1 : 1;
|
||||||
|
setCursorPosition(num0, num1);
|
||||||
|
break;
|
||||||
|
default: // Invalid control character
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
} else if (*str != '\0') {
|
||||||
|
// Read control character (between 0x40 - 0x7e) for single argument sequences
|
||||||
|
switch (*str) {
|
||||||
|
case 'A': // CUU - Cursor up
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorUp(num0);
|
||||||
|
break;
|
||||||
|
case 'B': // CUD - Cursor down
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorDown(num0);
|
||||||
|
break;
|
||||||
|
case 'C': // CUF - Cursor forward
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorForward(num0);
|
||||||
|
break;
|
||||||
|
case 'D': // CUB - Cursor back
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorBackward(num0);
|
||||||
|
break;
|
||||||
|
case 'E': // CNL - Cursor next line
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorNextLine(num0);
|
||||||
|
break;
|
||||||
|
case 'F': // CPL - Cursor previous line
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorPreviousLine(num0);
|
||||||
|
break;
|
||||||
|
case 'G': // CHA - Cursor horizontal absolute
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorToColumn(num0);
|
||||||
|
break;
|
||||||
|
case 'J': // ED - Erase display
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
eraseDisplay(num0);
|
||||||
|
break;
|
||||||
|
case 'K': // EL - Erase in line
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
eraseInline(num0);
|
||||||
|
break;
|
||||||
|
case 'S': // SU - Scroll up
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
scrollUp(num0);
|
||||||
|
break;
|
||||||
|
case 'T': // SD Scroll down
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
scrollDown(num0);
|
||||||
|
break;
|
||||||
|
case 'm': // SGR - Select graphic rendition (single optional argument)
|
||||||
|
break;
|
||||||
|
case ';': // SGR - Select graphic rendition (multiple arguments)
|
||||||
|
if (fnd0) {
|
||||||
|
while (fnd0) {
|
||||||
|
readASCIINumber(++str, &fnd0, &str);
|
||||||
|
if (fnd0) {
|
||||||
|
if (*str == 'm') {
|
||||||
|
break; // Valid SGR
|
||||||
|
} else if (*str == ';') {
|
||||||
|
continue; // More SGR parameters yet
|
||||||
|
} else {
|
||||||
|
break; // Invalid escape
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
// Invalid escape; expected SGR parameter
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
// Invalid escape; expected first SGR parameter but none given
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case 'n': // DSR - Device status report
|
||||||
|
if (fnd0 && num0 == 6) {
|
||||||
|
// Valid DSR
|
||||||
|
} else {
|
||||||
|
// Invalid DSR
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
default: // Invalid control character
|
||||||
|
writeCharToLCD(*str);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
return; // Invalid escape sequence (terminated early)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
writeCharToLCD(*str);
|
||||||
|
}
|
||||||
|
|
||||||
|
str++;
|
||||||
|
#else
|
||||||
|
writeCharToLCD(*(str++));
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// LCD command functions (all have associated ANSI escape)
|
||||||
|
|
||||||
|
/*
|
||||||
|
Writes the CMD_CLEAR_DISPLAY command to the LCD using writeLCDINSTR, and clears the local
|
||||||
|
char and line counters.
|
||||||
|
*/
|
||||||
|
void clearDisplay(void) {
|
||||||
|
writeLCDInstr(CMD_CLEAR_DISPLAY);
|
||||||
|
|
||||||
|
// Reset line and char number tracking
|
||||||
|
currentLineNum = 0;
|
||||||
|
currentLineChars = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Writes the CMD_RETURN_HOME command to the LCD using writeLCDInstr, and clears the local char
|
||||||
|
and line counters.
|
||||||
|
*/
|
||||||
|
void returnHome(void) {
|
||||||
|
writeLCDInstr(CMD_RETURN_HOME);
|
||||||
|
|
||||||
|
// Reset line and char number tracking
|
||||||
|
currentLineNum = 0;
|
||||||
|
currentLineChars = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void getCursorPosition(uint8_t* row, uint8_t* column) {
|
||||||
|
*row = currentLineNum + 1;
|
||||||
|
*column = currentLineChars + 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
void setCursorPosition(uint8_t row, uint8_t column) {
|
||||||
|
// Set currentLineNum and currentLineChars
|
||||||
|
currentLineNum = row ? row - 1 : 0;
|
||||||
|
currentLineChars = column ? column - 1 : 0;
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorUp(uint8_t n) {
|
||||||
|
if (n < currentLineNum + 1) {
|
||||||
|
currentLineNum -= n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorDown(uint8_t n) {
|
||||||
|
if (n + currentLineNum < LCD_NUMBER_OF_LINES) {
|
||||||
|
currentLineNum += n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = LCD_NUMBER_OF_LINES - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorForward(uint8_t n) {
|
||||||
|
if (n + currentLineChars < LCD_CHARACTERS_PER_LINE) {
|
||||||
|
currentLineChars += n;
|
||||||
|
} else {
|
||||||
|
currentLineChars = LCD_CHARACTERS_PER_LINE - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorBackward(uint8_t n) {
|
||||||
|
if (n < currentLineChars + 1) {
|
||||||
|
currentLineChars -= n;
|
||||||
|
} else {
|
||||||
|
currentLineChars = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorNextLine(uint8_t n) {
|
||||||
|
currentLineChars = 0;
|
||||||
|
|
||||||
|
if (n + currentLineNum < LCD_NUMBER_OF_LINES) {
|
||||||
|
currentLineNum += n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = LCD_NUMBER_OF_LINES - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorPreviousLine(uint8_t n) {
|
||||||
|
currentLineChars = 0;
|
||||||
|
|
||||||
|
if (n < currentLineNum + 1) {
|
||||||
|
currentLineNum -= n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorToColumn(uint8_t n) {
|
||||||
|
if (n <= LCD_CHARACTERS_PER_LINE) {
|
||||||
|
currentLineChars = n ? n - 1 : 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
} // else index out of range (off screen column)
|
||||||
|
}
|
||||||
|
|
||||||
|
void eraseDisplay(uint8_t n) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
switch (n) {
|
||||||
|
case 0: // Clear from cursor to end of screen
|
||||||
|
{
|
||||||
|
uint8_t len = (LCD_NUMBER_OF_LINES - old_row)*LCD_CHARACTERS_PER_LINE + (LCD_CHARACTERS_PER_LINE - old_column);
|
||||||
|
for (uint8_t i = 0; i < len; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
|
||||||
|
// Write last char without scrolling
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(' ');
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case 1: // Clear from cursor to beginning of screen
|
||||||
|
{
|
||||||
|
uint8_t len = (old_row - 1)*LCD_CHARACTERS_PER_LINE + old_column;
|
||||||
|
returnHome();
|
||||||
|
for (uint8_t i = 0; i < len; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
|
||||||
|
// Write last char without scrolling
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(' ');
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case 2: // Clear entire screen
|
||||||
|
clearDisplay();
|
||||||
|
break;
|
||||||
|
default: // Invalid argument; do nothing
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
|
||||||
|
void eraseInline(uint8_t n) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
switch (n) {
|
||||||
|
case 0: // Clear from cursor to end of line
|
||||||
|
for (uint8_t i = old_column; i <= LCD_CHARACTERS_PER_LINE; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
break;
|
||||||
|
case 1: // Clear from cursor to beginning of line
|
||||||
|
setCursorPosition(old_row, 1);
|
||||||
|
for (uint8_t i = 1; i <= old_column; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
break;
|
||||||
|
case 2: // Clear entire line
|
||||||
|
setCursorPosition(old_row, 1);
|
||||||
|
for (uint8_t i = 1; i <= LCD_CHARACTERS_PER_LINE; i++) {
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(' ');
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
default: // Invalid argument; do nothing
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
|
||||||
|
void scrollUp(uint8_t n) {
|
||||||
|
#if LCD_NUMBER_OF_LINES == 1
|
||||||
|
clearDisplay();
|
||||||
|
#else
|
||||||
|
if (n >= LCD_NUMBER_OF_LINES) {
|
||||||
|
clearDisplay();
|
||||||
|
} else {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
uint8_t len = (LCD_NUMBER_OF_LINES - n)*LCD_CHARACTERS_PER_LINE + 1;
|
||||||
|
char str[len];
|
||||||
|
readCharsFromLCD(n + 1, 1, LCD_NUMBER_OF_LINES, LCD_CHARACTERS_PER_LINE, str, len);
|
||||||
|
setCursorPosition(1, 1); // returnHome();
|
||||||
|
writeStringToLCD(str);
|
||||||
|
|
||||||
|
// Add n newlines to bottom of screen
|
||||||
|
for (uint8_t i = 0; i < n; i++) {
|
||||||
|
setCursorPosition(LCD_NUMBER_OF_LINES - i, 1);
|
||||||
|
eraseInline(2);
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
void scrollDown(uint8_t n) {
|
||||||
|
#if LCD_NUMBER_OF_LINES == 1
|
||||||
|
clearDisplay();
|
||||||
|
#else
|
||||||
|
if (n >= LCD_NUMBER_OF_LINES) {
|
||||||
|
clearDisplay();
|
||||||
|
} else {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
uint8_t len = (LCD_NUMBER_OF_LINES - n)*LCD_CHARACTERS_PER_LINE + 1;
|
||||||
|
char str[len];
|
||||||
|
readCharsFromLCD(1, 1, LCD_NUMBER_OF_LINES - n, LCD_CHARACTERS_PER_LINE, str, len);
|
||||||
|
|
||||||
|
for (uint8_t column = n + 1, i = 0; column <= LCD_NUMBER_OF_LINES; column++) {
|
||||||
|
setCursorPosition(column , 1);
|
||||||
|
for (uint8_t row = 1; row <= LCD_CHARACTERS_PER_LINE; row++) {
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(str[i++]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add n newlines to top of screen
|
||||||
|
for (uint8_t i = 1; i <= n; i++) {
|
||||||
|
setCursorPosition(i, 1);
|
||||||
|
eraseInline(2);
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
void saveCursorPosition() {
|
||||||
|
saveCursorLineNum = currentLineNum;
|
||||||
|
saveCursorLineChars = currentLineChars;
|
||||||
|
}
|
||||||
|
|
||||||
|
void restoreCursorPosition() {
|
||||||
|
currentLineNum = saveCursorLineNum;
|
||||||
|
currentLineChars = saveCursorLineChars;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void hideCursor(void) {
|
||||||
|
lcdState &= ~(1 << INSTR_DISPLAY_C);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void showCursor(void) {
|
||||||
|
lcdState |= (1 << INSTR_DISPLAY_C);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
//-----------------------------------------------------------------------------------------------
|
||||||
|
// Utility functions (with no associated ASCII or ANSI escape)
|
||||||
|
|
||||||
|
void blinkCursorOff(void) {
|
||||||
|
lcdState &= ~(1 << INSTR_DISPLAY_B);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void blinkCursorOn(void) {
|
||||||
|
lcdState |= (1 << INSTR_DISPLAY_B);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void displayOff(void) {
|
||||||
|
lcdState &= ~(1 << INSTR_DISPLAY_D);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void displayOn(void) {
|
||||||
|
lcdState |= (1 << INSTR_DISPLAY_D);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
//-----------------------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
char readCharFromLCD(uint8_t row, uint8_t column) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
setCursorPosition(row, column);
|
||||||
|
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
char c = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
return c;
|
||||||
|
}
|
||||||
|
|
||||||
|
void readLCDLine(uint8_t i, char* str) {
|
||||||
|
readCharsFromLCD(i, 1, i, LCD_CHARACTERS_PER_LINE, str, LCD_CHARACTERS_PER_LINE + 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Advanced functions for special cases
|
||||||
|
|
||||||
|
void readCharsFromLCD(uint8_t from_row, uint8_t from_column, uint8_t to_row, uint8_t to_column, char* str, uint8_t len) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
setCursorPosition(from_row, from_column);
|
||||||
|
|
||||||
|
for (uint8_t i = 0; i < len - 1 && from_row <= to_row; i++) {
|
||||||
|
if (from_row == LCD_NUMBER_OF_LINES && from_column == LCD_CHARACTERS_PER_LINE) {
|
||||||
|
// Last character on screen
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
*(str++) = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
} else if (from_column == LCD_CHARACTERS_PER_LINE) { // End of line (but not last one)
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
*(str++) = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
from_row += 1;
|
||||||
|
from_column = 1;
|
||||||
|
setCursorPosition(from_row, from_column);
|
||||||
|
} else {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
*(str++) = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
from_column++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Ensure array is terminated with null character
|
||||||
|
*str = '\0';
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Initialize LCD using the internal reset circuitry.
|
||||||
|
|
||||||
|
Note: This currently only works with 8 bit modes, but is not recommended. Instead use the
|
||||||
|
initLCD function which uses the software initialization method and works for 8-bit
|
||||||
|
modes as well the 4-bit mode.
|
||||||
|
*/
|
||||||
|
void initLCDByInternalReset(void) {
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
// Function set (8-bit interface; 2 lines with 5x7 dot character font)
|
||||||
|
writeLCDInstr_(INSTR_FUNC_SET | (1 << INSTR_FUNC_SET_DL) | (1 << INSTR_FUNC_SET_N));
|
||||||
|
|
||||||
|
writeLCDInstr_(0x0F);
|
||||||
|
writeLCDInstr_(0x06);
|
||||||
|
writeLCDInstr_(CMD_CLEAR_DISPLAY);
|
||||||
|
_delay_ms(LCD_CLEAR_DISPLAY_DELAY);
|
||||||
|
}
|
|
@ -1 +0,0 @@
|
||||||
../../lcdLib.h
|
|
|
@ -0,0 +1,328 @@
|
||||||
|
/**
|
||||||
|
* (C) Copyright Collin J. Doering 2015
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file lcdLib.h
|
||||||
|
* @author Collin J. Doering <collin.doering@rekahsoft.ca>
|
||||||
|
* @date Sep 29, 2015
|
||||||
|
* @brief Functions to initialize, and operate a character LCD.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef LCD_LIB_H
|
||||||
|
#define LCD_LIB_H
|
||||||
|
|
||||||
|
// Includes -----------------------------------------------------------------------------------
|
||||||
|
#include "lcd_instr.h"
|
||||||
|
#include "lcdLibConfig.h"
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Library function declarations
|
||||||
|
|
||||||
|
/**
|
||||||
|
Initialize the LCD display via software initialization as specified by the datasheet.
|
||||||
|
*/
|
||||||
|
void initLCD(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Writes a character to the LCD display at the current cursor position after the LCD display is
|
||||||
|
ready for new data. Allows the following ASCII escapes: '\n', '\r', '\f' and '\b'; ignores
|
||||||
|
ASCII escape '\a'.
|
||||||
|
*/
|
||||||
|
void writeCharToLCD(char);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Writes a string to the LCD starting from the current cursor position.
|
||||||
|
*/
|
||||||
|
void writeStringToLCD(char*);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// LCD command functions (all have associated ANSI escape)
|
||||||
|
|
||||||
|
/**
|
||||||
|
Clears the display and positions the cursor in the top left of the LCD screen.
|
||||||
|
*/
|
||||||
|
void clearDisplay(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Brings the cursor the the top left of the LCD screen.
|
||||||
|
*/
|
||||||
|
void returnHome(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Gets the current row and column of the LCD cursor and sets given pointers row and column to
|
||||||
|
their respective values. Note indexes start at 1.
|
||||||
|
*/
|
||||||
|
void getCursorPosition(uint8_t* row, uint8_t* column);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Using the given parameters row and column, sets the current row and column occupied by the LCD
|
||||||
|
cursor. Note indexes start at 1.
|
||||||
|
*/
|
||||||
|
void setCursorPosition(uint8_t row, uint8_t column);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions up. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorUp(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions down. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorDown(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions forward. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorForward(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions backwards. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorBackward(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor to the beginning of the line n lines down.
|
||||||
|
*/
|
||||||
|
void moveCursorNextLine(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor to the beginning of the line n lines up.
|
||||||
|
*/
|
||||||
|
void moveCursorPreviousLine(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor to column n. If n is off screen go to the last line.
|
||||||
|
*/
|
||||||
|
void moveCursorToColumn(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Scroll whole page up by n lines. New lines are added at the bottom.
|
||||||
|
*/
|
||||||
|
void scrollUp(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Scroll whole page down by n lines. New lines are added at the top.
|
||||||
|
*/
|
||||||
|
void scrollDown(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Saves the cursors current position.
|
||||||
|
*/
|
||||||
|
void saveCursorPosition(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Restores the last saved cursor position.
|
||||||
|
*/
|
||||||
|
void restoreCursorPosition(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Clears part or all of screen dependent on the value of n:
|
||||||
|
0 or missing: clear from cursor to end of screen
|
||||||
|
1: clear from cursor to end of screen
|
||||||
|
2: clear entire screen
|
||||||
|
*/
|
||||||
|
void eraseDisplay(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Erases part of a line dependent on the value of n:
|
||||||
|
0 or missing: clear from cursor to end of the line
|
||||||
|
1: clear from cursor to beginning of the line
|
||||||
|
2: clear entire line
|
||||||
|
*/
|
||||||
|
void eraseInline(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Hides the cursor
|
||||||
|
*/
|
||||||
|
void hideCursor(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Shows the cursor
|
||||||
|
*/
|
||||||
|
void showCursor(void);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Utility functions (with no associated ASCII or ANSI escape)
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the cursor blink off.
|
||||||
|
*/
|
||||||
|
void blinkCursorOff(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the cursor blink on.
|
||||||
|
*/
|
||||||
|
void blinkCursorOn(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the display off.
|
||||||
|
*/
|
||||||
|
void displayOff(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the display on.
|
||||||
|
*/
|
||||||
|
void displayOn(void);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
/**
|
||||||
|
Read a single character from the row and column given (1 based) returning the cursor to
|
||||||
|
its previous original position.
|
||||||
|
*/
|
||||||
|
char readCharFromLCD(uint8_t row, uint8_t column);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Read a line i (ones based) into str.
|
||||||
|
*/
|
||||||
|
void readLCDLine(uint8_t i, char* str);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Advanced functions for special cases
|
||||||
|
|
||||||
|
/**
|
||||||
|
Read len characters from (from_row, from_column) to (to_row, to_column) returning the cursor
|
||||||
|
to its original position after the read. Upon success (not overflowing the screen), 0 is
|
||||||
|
returned; otherwise non zero will be returned. The str pointer will be updated with the
|
||||||
|
characters read from the screen. Even in the case of failure, str may be partially populated.
|
||||||
|
*/
|
||||||
|
void readCharsFromLCD(uint8_t from_row, uint8_t from_column, uint8_t to_row, uint8_t to_column, char* str, uint8_t len);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Initialize the LCD display via its internal reset circuit.
|
||||||
|
|
||||||
|
Note: this is not the recommended way to initialize the LCD as it is unreliable and depends
|
||||||
|
on the power supply. Preferably the software initialization method should be used (via
|
||||||
|
the initLCD function).
|
||||||
|
*/
|
||||||
|
void initLCDByInternalReset(void);
|
||||||
|
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Mode and settings sanity check (preprocessor tests of lcdLibConfig.h)
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
#if !defined(LCD_CHARACTERS_PER_LINE)
|
||||||
|
#error "All modes require LCD_CHARACTERS_PER_LINE to be defined."
|
||||||
|
#elif !defined(LCD_NUMBER_OF_LINES)
|
||||||
|
#error "All modes require LCD_NUMBER_OF_LINES to be defined."
|
||||||
|
#elif !defined(LCD_LINE_BEGINNINGS)
|
||||||
|
#error "All modes require LCD_LINE_BEGINNINGS to be defined."
|
||||||
|
#else
|
||||||
|
|
||||||
|
#if LCD_NUMBER_OF_LINES == 1
|
||||||
|
#define LCD_LINES 0
|
||||||
|
#else
|
||||||
|
#define LCD_LINES (1 << INSTR_FUNC_SET_N)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define LCD_CHARACTERS_PER_SCREEN (LCD_CHARACTERS_PER_LINE * LCD_NUMBER_OF_LINES)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if !defined(LCD_FONT_5x8) &&\
|
||||||
|
!defined(LCD_FONT_5x10)
|
||||||
|
#error "All modes require LCD_FONT_5x8 or LCD_FONT_5x10 to be defined."
|
||||||
|
#elif defined(LCD_FONT_5x8) && \
|
||||||
|
defined(LCD_FONT_5x10)
|
||||||
|
#error "LCD_FONT_5x8 and LCD_FONT_5x10 are mutually exclusive. Choose one."
|
||||||
|
#elif defined(LCD_FONT_5x8)
|
||||||
|
#define LCD_FONT 0
|
||||||
|
#elif defined(LCD_FONT_5x10)
|
||||||
|
#define LCD_FONT (1 << INSTR_FUNC_SET_F)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if !defined (LCD_RS) || \
|
||||||
|
!defined (LCD_RS_PORT) || \
|
||||||
|
!defined (LCD_RS_DDR) || \
|
||||||
|
!defined (LCD_RW) || \
|
||||||
|
!defined (LCD_RW_PORT) || \
|
||||||
|
!defined (LCD_RW_DDR) || \
|
||||||
|
!defined (LCD_ENABLE) || \
|
||||||
|
!defined (LCD_ENABLE_PORT) || \
|
||||||
|
!defined (LCD_ENABLE_DDR)
|
||||||
|
#error "All modes require LCD_RS[,_PORT,_DDR], LCD_RW[,_PORT,_DDR], and LCD_ENABLE[,_PORT,_DDR] be defined."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined (EIGHT_BIT_ARBITRARY_PIN_MODE) && \
|
||||||
|
defined (FOUR_BIT_MODE)
|
||||||
|
#error "EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE are mutually exclusive. Choose one."
|
||||||
|
#elif defined (EIGHT_BIT_ARBITRARY_PIN_MODE) || \
|
||||||
|
defined (FOUR_BIT_MODE)
|
||||||
|
|
||||||
|
// EIGHT_BIT_ARBITRARY_PIN_MODE specific requirements
|
||||||
|
#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
|
||||||
|
#if !defined (LCD_DBUS0) || \
|
||||||
|
!defined (LCD_DBUS0_PORT) || \
|
||||||
|
!defined (LCD_DBUS0_DDR) || \
|
||||||
|
!defined (LCD_DBUS0_PIN) || \
|
||||||
|
!defined (LCD_DBUS1) || \
|
||||||
|
!defined (LCD_DBUS1_PORT) || \
|
||||||
|
!defined (LCD_DBUS1_DDR) || \
|
||||||
|
!defined (LCD_DBUS1_PIN) || \
|
||||||
|
!defined (LCD_DBUS2) || \
|
||||||
|
!defined (LCD_DBUS2_PORT) || \
|
||||||
|
!defined (LCD_DBUS2_DDR) || \
|
||||||
|
!defined (LCD_DBUS2_PIN) || \
|
||||||
|
!defined (LCD_DBUS3) || \
|
||||||
|
!defined (LCD_DBUS3_PORT) || \
|
||||||
|
!defined (LCD_DBUS3_DDR) || \
|
||||||
|
!defined (LCD_DBUS3_PIN)
|
||||||
|
#error "EIGHT_BIT_ARBITRARY_PIN_MODE require that LCD_DBUS*[,_PORT,_DDR,_PIN] be defined."
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
|
|
||||||
|
// Requirements for EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE
|
||||||
|
#if !defined (LCD_DBUS4) || \
|
||||||
|
!defined (LCD_DBUS4_PORT) || \
|
||||||
|
!defined (LCD_DBUS4_DDR) || \
|
||||||
|
!defined (LCD_DBUS4_PIN) || \
|
||||||
|
!defined (LCD_DBUS5) || \
|
||||||
|
!defined (LCD_DBUS5_PORT) || \
|
||||||
|
!defined (LCD_DBUS5_DDR) || \
|
||||||
|
!defined (LCD_DBUS5_PIN) || \
|
||||||
|
!defined (LCD_DBUS6) || \
|
||||||
|
!defined (LCD_DBUS6_PORT) || \
|
||||||
|
!defined (LCD_DBUS6_DDR) || \
|
||||||
|
!defined (LCD_DBUS6_PIN) || \
|
||||||
|
!defined (LCD_DBUS7) || \
|
||||||
|
!defined (LCD_DBUS7_PORT) || \
|
||||||
|
!defined (LCD_DBUS7_DDR) || \
|
||||||
|
!defined (LCD_DBUS7_PIN)
|
||||||
|
#error "Both EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE require that LCD_DBUS*[,_PORT,_DDR,_PIN] be defined."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
// Set LCD_BF automatically for both EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE
|
||||||
|
#undef LCD_BF
|
||||||
|
#define LCD_BF LCD_DBUS7
|
||||||
|
|
||||||
|
#else
|
||||||
|
#if !defined (LCD_DBUS_PORT) || \
|
||||||
|
!defined (LCD_DBUS_DDR) || \
|
||||||
|
!defined (LCD_DBUS_PIN) || \
|
||||||
|
!defined (LCD_BF)
|
||||||
|
#error "Default mode requires that LCD_DBUS_[PORT,DDR,PIN] and LCD_BF be defined."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#undef LCD_DBUS7_PORT
|
||||||
|
#define LCD_DBUS7_PORT LCD_DBUS_PORT
|
||||||
|
#undef LCD_DBUS7_DDR
|
||||||
|
#define LCD_DBUS7_DDR LCD_DBUS_DDR
|
||||||
|
#undef LCD_DBUS7_PIN
|
||||||
|
#define LCD_DBUS7_PIN LCD_DBUS_PIN
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* LCD_LIB_H */
|
|
@ -57,7 +57,7 @@
|
||||||
//#define LCD_FONT_5x10
|
//#define LCD_FONT_5x10
|
||||||
|
|
||||||
/* Support ANSI escapes; comment to disable */
|
/* Support ANSI escapes; comment to disable */
|
||||||
#define LCD_ANSI_ESCAPE_ENABLE
|
//#define LCD_ANSI_ESCAPE_ENABLE
|
||||||
|
|
||||||
/* Modes */
|
/* Modes */
|
||||||
|
|
||||||
|
|
|
@ -1 +0,0 @@
|
||||||
../../lcd_instr.h
|
|
|
@ -0,0 +1,61 @@
|
||||||
|
/**
|
||||||
|
* (C) Copyright Collin J. Doering 2015
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file lcd_instr.h
|
||||||
|
* @author Collin J. Doering <collin.doering@rekahsoft.ca>
|
||||||
|
* @date Oct 26, 2015
|
||||||
|
* @brief Constant macro definitions of HD44780 compatible character LCD instruction set
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
LCD character display instructions
|
||||||
|
*/
|
||||||
|
|
||||||
|
// Simple instructions with no options
|
||||||
|
#define CMD_INIT 0x30
|
||||||
|
#define CMD_INIT_FOUR_BIT 0x20
|
||||||
|
#define CMD_CLEAR_DISPLAY 0x01
|
||||||
|
#define CMD_RETURN_HOME 0x02
|
||||||
|
|
||||||
|
// Entry Set instruction and associated options
|
||||||
|
#define INSTR_ENTRY_SET 0x04
|
||||||
|
#define INSTR_ENTRY_SET_ID 1
|
||||||
|
#define INSTR_ENTRY_SET_S 0
|
||||||
|
|
||||||
|
// Display control instruction and associated options
|
||||||
|
#define INSTR_DISPLAY 0x08
|
||||||
|
#define INSTR_DISPLAY_D 2
|
||||||
|
#define INSTR_DISPLAY_C 1
|
||||||
|
#define INSTR_DISPLAY_B 0
|
||||||
|
|
||||||
|
// Cursor or display shift instruction and associated options
|
||||||
|
#define INSTR_MOV_SHIFT 0x10
|
||||||
|
#define INSTR_MOV_SHIFT_SC 3
|
||||||
|
#define INSTR_MOV_SHIFT_RL 2
|
||||||
|
|
||||||
|
// Function set instruction and associated options
|
||||||
|
#define INSTR_FUNC_SET 0x20
|
||||||
|
#define INSTR_FUNC_SET_DL 4
|
||||||
|
#define INSTR_FUNC_SET_N 3
|
||||||
|
#define INSTR_FUNC_SET_F 2
|
||||||
|
|
||||||
|
// Set CG RAM address instruction
|
||||||
|
#define INSTR_CGRAM_ADDR 0x60
|
||||||
|
|
||||||
|
// Set DD RAM address instruction
|
||||||
|
#define INSTR_DDRAM_ADDR 0x80
|
|
@ -1 +0,0 @@
|
||||||
../../ansi_escapes.h
|
|
|
@ -0,0 +1,56 @@
|
||||||
|
/**
|
||||||
|
* (C) Copyright Collin J. Doering 2015
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file ansi_escapes.h
|
||||||
|
* @author Collin J. Doering <collin.doering@rekahsoft.ca>
|
||||||
|
* @date Oct 9, 2015
|
||||||
|
* @brief Macros to ease writing ANSI escapes.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define CSI "\e[" ///< Control Sequence Introducer
|
||||||
|
|
||||||
|
#define CUU(n) CSI #n "A" ///< Cursor up
|
||||||
|
#define CUD(n) CSI #n "B" ///< Cursor down
|
||||||
|
#define CUF(n) CSI #n "C" ///< Cursor forward
|
||||||
|
#define CUB(n) CSI #n "D" ///< Cursor backward
|
||||||
|
|
||||||
|
#define CNL(n) CSI #n "E" ///< Cursor next line
|
||||||
|
#define CPL(n) CSI #n "F" ///< Cursor previous line
|
||||||
|
|
||||||
|
#define CHA(n) CSI #n "G" ///< Cursor horizontal absolute
|
||||||
|
#define CUP(n,m) CSI #n ";" #m "H" ///< Cursor position
|
||||||
|
|
||||||
|
#define ED(n) CSI #n "J" ///< Erase display
|
||||||
|
#define EL(n) CSI #n "K" ///< Erase in line
|
||||||
|
#define SU(n) CSI #n "S" ///< Scroll up
|
||||||
|
#define SD(n) CSI #n "T" ///< Scroll down
|
||||||
|
|
||||||
|
#define HVP(n,m) CSI #n ";" #m "f" ///< Horizontal and vertical position
|
||||||
|
|
||||||
|
// #define SGR(n,m) CSI #n #m ///< Select graphic rendition
|
||||||
|
|
||||||
|
#define AUX_ON CSI "5i" ///< AUX port on
|
||||||
|
#define AUX_OFF CSI "4i" ///< AUX port off
|
||||||
|
|
||||||
|
// #define DSR CSI "6 n" ///< Device status report
|
||||||
|
|
||||||
|
#define SCP CSI "s" ///< Save cursor position
|
||||||
|
#define RCP CSI "u" ///< Restore cursor position
|
||||||
|
|
||||||
|
#define HIDE_CURSOR CSI "?25l" ///< DECTCEM: hide cursor
|
||||||
|
#define SHOW_CURSOR CSI "?25h" ///< DECTCEM: show cursor
|
|
@ -1 +0,0 @@
|
||||||
../../lcdLib.c
|
|
|
@ -0,0 +1,969 @@
|
||||||
|
/**
|
||||||
|
* (C) Copyright Collin J. Doering 2015
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* File: lcdLib.c
|
||||||
|
* Author: Collin J. Doering <collin.doering@rekahsoft.ca>
|
||||||
|
* Date: Sep 29, 2015
|
||||||
|
*/
|
||||||
|
|
||||||
|
// Includes -----------------------------------------------------------------------------------
|
||||||
|
#include <math.h>
|
||||||
|
#include <avr/io.h>
|
||||||
|
#include <util/delay.h>
|
||||||
|
|
||||||
|
#include "lcdLib.h"
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Static global variables
|
||||||
|
|
||||||
|
static volatile uint8_t currentLineNum;
|
||||||
|
static volatile uint8_t currentLineChars;
|
||||||
|
|
||||||
|
static volatile uint8_t saveCursorLineNum;
|
||||||
|
static volatile uint8_t saveCursorLineChars;
|
||||||
|
|
||||||
|
static volatile uint8_t lcdState;
|
||||||
|
|
||||||
|
static const uint8_t lineBeginnings[LCD_NUMBER_OF_LINES] = { LCD_LINE_BEGINNINGS };
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Static functions
|
||||||
|
|
||||||
|
/*
|
||||||
|
Bring LCD_ENABLE line high, wait for LCD_ENABLE_HIGH_DELAY; then bring LCD_ENABLE line low
|
||||||
|
and wait for LCD_ENABLE_LOW_DELAY.
|
||||||
|
|
||||||
|
Note: LCD_ENABLE, LCD_ENABLE_HIGH_DELAY, and LCD_ENABLE_LOW_DELAY must be defined in lcdLibConfig.h
|
||||||
|
*/
|
||||||
|
static void clkLCD(void) {
|
||||||
|
LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
|
||||||
|
_delay_us(LCD_ENABLE_HIGH_DELAY);
|
||||||
|
LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
|
||||||
|
_delay_us(LCD_ENABLE_LOW_DELAY);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Wait until LCD_BF (busy flag) is cleared (low).
|
||||||
|
*/
|
||||||
|
static void loop_until_LCD_BF_clear(void) {
|
||||||
|
uint8_t bf;
|
||||||
|
|
||||||
|
LCD_RS_PORT &= ~(1 << LCD_RS); // RS=0
|
||||||
|
LCD_RW_PORT |= (1 << LCD_RW); // RW=1
|
||||||
|
|
||||||
|
// Set LCD_BF as input
|
||||||
|
LCD_DBUS7_DDR &= ~(1 << LCD_BF);
|
||||||
|
|
||||||
|
do {
|
||||||
|
bf = 0;
|
||||||
|
LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'delay data time' and 'enable pulse width'
|
||||||
|
|
||||||
|
bf |= (LCD_DBUS7_PIN & (1 << LCD_BF));
|
||||||
|
|
||||||
|
LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
|
||||||
|
|
||||||
|
#ifdef FOUR_BIT_MODE
|
||||||
|
LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'delay data time' and 'enable pulse width'
|
||||||
|
LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
|
||||||
|
#endif
|
||||||
|
} while (bf);
|
||||||
|
|
||||||
|
#if defined (FOUR_BIT_MODE) || defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
|
||||||
|
LCD_DBUS7_DDR |= (1 << LCD_DBUS7);
|
||||||
|
LCD_DBUS6_DDR |= (1 << LCD_DBUS6);
|
||||||
|
LCD_DBUS5_DDR |= (1 << LCD_DBUS5);
|
||||||
|
LCD_DBUS4_DDR |= (1 << LCD_DBUS4);
|
||||||
|
#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
|
||||||
|
LCD_DBUS3_DDR |= (1 << LCD_DBUS3);
|
||||||
|
LCD_DBUS2_DDR |= (1 << LCD_DBUS2);
|
||||||
|
LCD_DBUS1_DDR |= (1 << LCD_DBUS1);
|
||||||
|
LCD_DBUS0_DDR |= (1 << LCD_DBUS0);
|
||||||
|
#endif
|
||||||
|
#else
|
||||||
|
LCD_DBUS_DDR = 0xff; // Reset all LCD_DBUS_PORT pins as outputs
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Given a 8 bit integer, writes the four MSB's (one nibble) to the LCD data bus.
|
||||||
|
|
||||||
|
Note: this is only defined in FOUR_BIT_MODE
|
||||||
|
*/
|
||||||
|
#ifdef FOUR_BIT_MODE
|
||||||
|
static void writeLCDDBusNibble_(uint8_t b) {
|
||||||
|
// Reset data lines to zeros
|
||||||
|
LCD_DBUS7_PORT &= ~(1 << LCD_DBUS7);
|
||||||
|
LCD_DBUS6_PORT &= ~(1 << LCD_DBUS6);
|
||||||
|
LCD_DBUS5_PORT &= ~(1 << LCD_DBUS5);
|
||||||
|
LCD_DBUS4_PORT &= ~(1 << LCD_DBUS4);
|
||||||
|
|
||||||
|
// Write 1's where appropriate on data lines
|
||||||
|
if (b & (1 << 7)) LCD_DBUS7_PORT |= (1 << LCD_DBUS7);
|
||||||
|
if (b & (1 << 6)) LCD_DBUS6_PORT |= (1 << LCD_DBUS6);
|
||||||
|
if (b & (1 << 5)) LCD_DBUS5_PORT |= (1 << LCD_DBUS5);
|
||||||
|
if (b & (1 << 4)) LCD_DBUS4_PORT |= (1 << LCD_DBUS4);
|
||||||
|
|
||||||
|
// Pulse the enable line
|
||||||
|
clkLCD();
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
Given an 8 bit integer, writes it to the LCD data bus, regardless of its
|
||||||
|
configuration (default 8-bit mode, 8-bit arbitrary pin mode and 4-bit mode). In the default
|
||||||
|
8-bit mode and EIGHT_BIT_ARBITRARY_PIN_MODE, the given data is written in one cycle using the
|
||||||
|
writeLCDDBusByte_ function. In FOUR_BIT_MODE however, the given data is written in two cycles
|
||||||
|
using two successive calls to the writeLCDDBusNibble_ function.
|
||||||
|
|
||||||
|
This function does not ensure the LCD is ready to accept new data and thus needs to
|
||||||
|
be handled by the caller.
|
||||||
|
*/
|
||||||
|
static void writeLCDDBusByte_(uint8_t b) {
|
||||||
|
#ifdef FOUR_BIT_MODE
|
||||||
|
writeLCDDBusNibble_(b);
|
||||||
|
writeLCDDBusNibble_(b << 4);
|
||||||
|
#elif defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
|
||||||
|
// Reset data lines to zeros
|
||||||
|
LCD_DBUS7_PORT &= ~(1 << LCD_DBUS7);
|
||||||
|
LCD_DBUS6_PORT &= ~(1 << LCD_DBUS6);
|
||||||
|
LCD_DBUS5_PORT &= ~(1 << LCD_DBUS5);
|
||||||
|
LCD_DBUS4_PORT &= ~(1 << LCD_DBUS4);
|
||||||
|
LCD_DBUS3_PORT &= ~(1 << LCD_DBUS3);
|
||||||
|
LCD_DBUS2_PORT &= ~(1 << LCD_DBUS2);
|
||||||
|
LCD_DBUS1_PORT &= ~(1 << LCD_DBUS1);
|
||||||
|
LCD_DBUS0_PORT &= ~(1 << LCD_DBUS0);
|
||||||
|
|
||||||
|
// Write 1's where appropriate on data lines
|
||||||
|
if (b & (1 << 7)) LCD_DBUS7_PORT |= (1 << LCD_DBUS7);
|
||||||
|
if (b & (1 << 6)) LCD_DBUS6_PORT |= (1 << LCD_DBUS6);
|
||||||
|
if (b & (1 << 5)) LCD_DBUS5_PORT |= (1 << LCD_DBUS5);
|
||||||
|
if (b & (1 << 4)) LCD_DBUS4_PORT |= (1 << LCD_DBUS4);
|
||||||
|
if (b & (1 << 3)) LCD_DBUS3_PORT |= (1 << LCD_DBUS3);
|
||||||
|
if (b & (1 << 2)) LCD_DBUS2_PORT |= (1 << LCD_DBUS2);
|
||||||
|
if (b & (1 << 1)) LCD_DBUS1_PORT |= (1 << LCD_DBUS1);
|
||||||
|
if (b & (1 << 0)) LCD_DBUS0_PORT |= (1 << LCD_DBUS0);
|
||||||
|
|
||||||
|
clkLCD();
|
||||||
|
#else
|
||||||
|
LCD_DBUS_PORT = b;
|
||||||
|
clkLCD();
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Given a 8 bit integer representing a LCD instruction, sends it to the LCD display.
|
||||||
|
|
||||||
|
Sets RS=RW=0 and writes the given 8 bit integer to the LCD databus.
|
||||||
|
|
||||||
|
Note that this function does not ensure the LCD is ready to accept a new instruction and thus
|
||||||
|
needs to be handled by the caller.
|
||||||
|
*/
|
||||||
|
static void writeLCDInstr_(uint8_t instr) {
|
||||||
|
LCD_RS_PORT &= ~(1 << LCD_RS); // RS=0
|
||||||
|
LCD_RW_PORT &= ~(1 << LCD_RW); // RW=0
|
||||||
|
|
||||||
|
writeLCDDBusByte_(instr);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Given a 8 bit integer representing a LCD instruction, waits until the LCD is ready and sends
|
||||||
|
the instruction.
|
||||||
|
*/
|
||||||
|
static inline void writeLCDInstr(uint8_t instr) {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
writeLCDInstr_(instr);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Sets RS=1, RW=0 and accepts a char (8 bit) and outputs it to the current cursor position of
|
||||||
|
the LCD. In the default 8-bit mode and EIGHT_BIT_ARBITRARY_PIN_MODE, the given data is
|
||||||
|
written in one cycle using the writeLCDDBusByte_ function. In FOUR_BIT_MODE however, the given
|
||||||
|
data is written in two cycles using two successive calls to the writeLCDDBusNibble_ function.
|
||||||
|
*/
|
||||||
|
static void writeCharToLCD_(char c) {
|
||||||
|
LCD_RS_PORT |= (1 << LCD_RS); // RS=1
|
||||||
|
LCD_RW_PORT &= ~(1 << LCD_RW); // RW=0
|
||||||
|
|
||||||
|
writeLCDDBusByte_(c);
|
||||||
|
}
|
||||||
|
|
||||||
|
static uint8_t readLCDDBusByte_(void) {
|
||||||
|
LCD_RS_PORT |= (1 << LCD_RS); // RS=1
|
||||||
|
LCD_RW_PORT |= (1 << LCD_RW); // RW=1
|
||||||
|
|
||||||
|
LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'delay data time' and 'enable pulse width'
|
||||||
|
|
||||||
|
// Read data
|
||||||
|
char c = 0;
|
||||||
|
#if defined(FOUR_BIT_MODE)
|
||||||
|
if (LCD_DBUS7_PIN & (1 << LCD_DBUS7)) c |= (1 << 7);
|
||||||
|
if (LCD_DBUS6_PIN & (1 << LCD_DBUS6)) c |= (1 << 6);
|
||||||
|
if (LCD_DBUS5_PIN & (1 << LCD_DBUS5)) c |= (1 << 5);
|
||||||
|
if (LCD_DBUS4_PIN & (1 << LCD_DBUS4)) c |= (1 << 4);
|
||||||
|
|
||||||
|
LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
|
||||||
|
LCD_ENABLE_PORT |= (1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'delay data time' and 'enable pulse width'
|
||||||
|
|
||||||
|
if (LCD_DBUS7_PIN & (1 << LCD_DBUS7)) c |= (1 << 3);
|
||||||
|
if (LCD_DBUS6_PIN & (1 << LCD_DBUS6)) c |= (1 << 2);
|
||||||
|
if (LCD_DBUS5_PIN & (1 << LCD_DBUS5)) c |= (1 << 1);
|
||||||
|
if (LCD_DBUS4_PIN & (1 << LCD_DBUS4)) c |= (1 << 0);
|
||||||
|
#elif defined(EIGHT_BIT_ARBITRARY_PIN_MODE)
|
||||||
|
if (LCD_DBUS7_PIN & (1 << LCD_DBUS7)) c |= (1 << 7);
|
||||||
|
if (LCD_DBUS6_PIN & (1 << LCD_DBUS6)) c |= (1 << 6);
|
||||||
|
if (LCD_DBUS5_PIN & (1 << LCD_DBUS5)) c |= (1 << 5);
|
||||||
|
if (LCD_DBUS4_PIN & (1 << LCD_DBUS4)) c |= (1 << 4);
|
||||||
|
if (LCD_DBUS3_PIN & (1 << LCD_DBUS3)) c |= (1 << 3);
|
||||||
|
if (LCD_DBUS2_PIN & (1 << LCD_DBUS2)) c |= (1 << 2);
|
||||||
|
if (LCD_DBUS1_PIN & (1 << LCD_DBUS1)) c |= (1 << 1);
|
||||||
|
if (LCD_DBUS0_PIN & (1 << LCD_DBUS0)) c |= (1 << 0);
|
||||||
|
#else
|
||||||
|
c = LCD_DBUS_PIN;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
LCD_ENABLE_PORT &= ~(1 << LCD_ENABLE);
|
||||||
|
_delay_us(1); // 'address hold time', 'data hold time' and 'enable cycle width'
|
||||||
|
|
||||||
|
return c;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Given a character string, and a uint8_t pointer, reads the character string until a
|
||||||
|
non-numerical ASCII character, returning the integer representation of the number read. At
|
||||||
|
the end of the functions execution, the found_num uint8_t* will be updated to indicate how
|
||||||
|
many digits were read. The new_loc char** will be updated with the new parsing position in
|
||||||
|
the string.
|
||||||
|
*/
|
||||||
|
static uint8_t readASCIINumber(char* str, uint8_t* found_num, char** new_loc) {
|
||||||
|
uint8_t nums[3];
|
||||||
|
|
||||||
|
*found_num = 0;
|
||||||
|
while (*str != '\0' && *found_num < 3) {
|
||||||
|
if (*str >= 0x30 && *str <= 0x39) {
|
||||||
|
// Use *str as a number (specified in ASCII)
|
||||||
|
nums[(*found_num)++] = *str - 0x30;
|
||||||
|
} else {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
str++;
|
||||||
|
}
|
||||||
|
*new_loc = str;
|
||||||
|
|
||||||
|
uint8_t ret = 0;
|
||||||
|
uint8_t i = *found_num - 1;
|
||||||
|
for (uint8_t fnd = 0; fnd < *found_num; fnd++)
|
||||||
|
ret += nums[fnd] * pow(10, i--);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Set all pins of LCD_DBUS as outputs
|
||||||
|
*/
|
||||||
|
static inline void setLCDDBusAsOutputs(void) {
|
||||||
|
#if defined (FOUR_BIT_MODE) || defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
|
||||||
|
LCD_DBUS7_DDR |= (1 << LCD_DBUS7);
|
||||||
|
LCD_DBUS6_DDR |= (1 << LCD_DBUS6);
|
||||||
|
LCD_DBUS5_DDR |= (1 << LCD_DBUS5);
|
||||||
|
LCD_DBUS4_DDR |= (1 << LCD_DBUS4);
|
||||||
|
#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
|
||||||
|
LCD_DBUS3_DDR |= (1 << LCD_DBUS3);
|
||||||
|
LCD_DBUS2_DDR |= (1 << LCD_DBUS2);
|
||||||
|
LCD_DBUS1_DDR |= (1 << LCD_DBUS1);
|
||||||
|
LCD_DBUS0_DDR |= (1 << LCD_DBUS0);
|
||||||
|
#endif
|
||||||
|
#else
|
||||||
|
LCD_DBUS_DDR = 0xff;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Set all pins of LCD_DBUS as inputs (disabling their output)
|
||||||
|
*/
|
||||||
|
static inline void setLCDDBusAsInputs(void) {
|
||||||
|
#if defined (FOUR_BIT_MODE) || defined (EIGHT_BIT_ARBITRARY_PIN_MODE)
|
||||||
|
LCD_DBUS7_DDR &= ~(1 << LCD_DBUS7);
|
||||||
|
LCD_DBUS6_DDR &= ~(1 << LCD_DBUS6);
|
||||||
|
LCD_DBUS5_DDR &= ~(1 << LCD_DBUS5);
|
||||||
|
LCD_DBUS4_DDR &= ~(1 << LCD_DBUS4);
|
||||||
|
#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
|
||||||
|
LCD_DBUS3_DDR &= ~(1 << LCD_DBUS3);
|
||||||
|
LCD_DBUS2_DDR &= ~(1 << LCD_DBUS2);
|
||||||
|
LCD_DBUS1_DDR &= ~(1 << LCD_DBUS1);
|
||||||
|
LCD_DBUS0_DDR &= ~(1 << LCD_DBUS0);
|
||||||
|
#endif
|
||||||
|
#else
|
||||||
|
LCD_DBUS_DDR = 0;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Set RS=RW=0 and write the CMD_INIT command to the LCD data bus. Note that an appropriate
|
||||||
|
pause must follow before sending new commands to the LCD using writeLCD*_ functions.
|
||||||
|
*/
|
||||||
|
static inline void softwareLCDInitPulse(void) {
|
||||||
|
LCD_RS_PORT &= ~(1 << LCD_RS); // RS=0
|
||||||
|
LCD_RW_PORT &= ~(1 << LCD_RW); // RW=0
|
||||||
|
|
||||||
|
#ifdef FOUR_BIT_MODE
|
||||||
|
writeLCDDBusNibble_(CMD_INIT);
|
||||||
|
#else
|
||||||
|
writeLCDDBusByte_(CMD_INIT);
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Library function definitions
|
||||||
|
|
||||||
|
/*
|
||||||
|
Do software initialization as specified by the datasheet
|
||||||
|
*/
|
||||||
|
void initLCD(void) {
|
||||||
|
// Set LCD_RS, LCD_RW and LCD_ENABLE as outputs
|
||||||
|
LCD_RS_DDR |= (1 << LCD_RS);
|
||||||
|
LCD_RW_DDR |= (1 << LCD_RW);
|
||||||
|
LCD_ENABLE_DDR |= (1 << LCD_ENABLE);
|
||||||
|
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
_delay_us(LCD_INIT_DELAY0); // Wait minimum 15ms as per datasheet
|
||||||
|
softwareLCDInitPulse();
|
||||||
|
_delay_us(LCD_INIT_DELAY1); // Wait minimum 4.1ms as per datasheet
|
||||||
|
softwareLCDInitPulse();
|
||||||
|
_delay_us(LCD_INIT_DELAY2); // Wait minimum 100us as per datasheet
|
||||||
|
softwareLCDInitPulse();
|
||||||
|
|
||||||
|
#if defined (FOUR_BIT_MODE)
|
||||||
|
// Function Set (4-bit interface)
|
||||||
|
writeLCDDBusNibble_(CMD_INIT_FOUR_BIT);
|
||||||
|
writeLCDInstr_(CMD_INIT_FOUR_BIT | LCD_LINES | LCD_FONT);
|
||||||
|
#else
|
||||||
|
// Function set (8-bit interface)
|
||||||
|
writeLCDInstr_(INSTR_FUNC_SET | (1 << INSTR_FUNC_SET_DL) | LCD_LINES | LCD_FONT);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* BF now can be checked */
|
||||||
|
|
||||||
|
// Set functions of LCD
|
||||||
|
writeLCDInstr(INSTR_DISPLAY); // Display off
|
||||||
|
|
||||||
|
// Clear display
|
||||||
|
writeLCDInstr(CMD_CLEAR_DISPLAY);
|
||||||
|
|
||||||
|
// Increment mode, no shift
|
||||||
|
writeLCDInstr(INSTR_ENTRY_SET | (1 << INSTR_ENTRY_SET_ID));
|
||||||
|
|
||||||
|
// Display on, cursor on, blink off
|
||||||
|
lcdState = (1 << INSTR_DISPLAY_D) | (1 << INSTR_DISPLAY_C);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Given a single character, checks whether its a ASCII escape and does the following:
|
||||||
|
|
||||||
|
- Newline '\n': moves the cursor to the next physical line of the LCD display; if the cursor is on
|
||||||
|
the last line of the display, clears the display and positions the cursor at the top left
|
||||||
|
of the LCD
|
||||||
|
- Carriage return '\r': moves the cursor to the beginning of the current line
|
||||||
|
- Backspace '\b': moves the cursor one position backwards, wrapping to the end of the
|
||||||
|
previous line when at the beginning of a line (other then the first one). A space is then
|
||||||
|
inserted to replace the character at point, without moving the cursor. When the cursor is
|
||||||
|
at the beginning of the first line, does nothing.
|
||||||
|
- Form feed '\f': clears the LCD display and places the cursor at the beginning of the first line.
|
||||||
|
- Alarm '\a': ignored
|
||||||
|
|
||||||
|
Any other character is sent to the LCD display using writeCharToLCD_.
|
||||||
|
*/
|
||||||
|
void writeCharToLCD(char c) {
|
||||||
|
switch (c) {
|
||||||
|
case '\n': // Line feed
|
||||||
|
if (currentLineNum == LCD_NUMBER_OF_LINES - 1) {
|
||||||
|
scrollUp(1);
|
||||||
|
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[currentLineNum]);
|
||||||
|
} else {
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[++currentLineNum]);
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case '\a': // Alarm
|
||||||
|
break;
|
||||||
|
case '\b': // Backspace (non-destructive)
|
||||||
|
if (currentLineChars == 0 && currentLineNum == 0) {
|
||||||
|
// At first line, first column; there is no where to move; do nothing
|
||||||
|
break;
|
||||||
|
} else if (currentLineChars == 0) {
|
||||||
|
// At beginning of line, need to move the end of previous line
|
||||||
|
currentLineChars = LCD_CHARACTERS_PER_LINE - 1;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[--currentLineNum] + currentLineChars));
|
||||||
|
} else {
|
||||||
|
// OK, simply go back one character
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + --currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
break;
|
||||||
|
case '\r': // Carriage return
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[currentLineNum]);
|
||||||
|
currentLineChars = 0;
|
||||||
|
break;
|
||||||
|
case '\f': // Form feed
|
||||||
|
clearDisplay();
|
||||||
|
break;
|
||||||
|
default: // Printable character
|
||||||
|
if (currentLineChars == LCD_CHARACTERS_PER_LINE - 1 && currentLineNum == LCD_NUMBER_OF_LINES - 1) {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
writeCharToLCD_(c);
|
||||||
|
|
||||||
|
scrollUp(1);
|
||||||
|
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[currentLineNum]);
|
||||||
|
} else if (currentLineChars == LCD_CHARACTERS_PER_LINE - 1) {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
writeCharToLCD_(c);
|
||||||
|
|
||||||
|
currentLineChars = 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | lineBeginnings[++currentLineNum]);
|
||||||
|
} else {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
writeCharToLCD_(c);
|
||||||
|
currentLineChars++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void writeStringToLCD(char* str) {
|
||||||
|
while (*str != '\0') {
|
||||||
|
#ifdef LCD_ANSI_ESCAPE_ENABLE
|
||||||
|
// Check for ANSI CSI (Control Sequence Introducer)
|
||||||
|
if (*str == '\e') {
|
||||||
|
if (*(++str) != '\0' && *str == '[') {
|
||||||
|
char* str_ref = ++str;
|
||||||
|
switch (*str) {
|
||||||
|
case 's': // SCP - Save cursor position
|
||||||
|
saveCursorPosition();
|
||||||
|
return;
|
||||||
|
case 'u': // RCP - Restore cursor position
|
||||||
|
restoreCursorPosition();
|
||||||
|
return;
|
||||||
|
case '?': // DECTCEM
|
||||||
|
if (*(++str_ref) != '\0' && *str_ref == '2') {
|
||||||
|
if (*(++str_ref) != '\0' && *str_ref == '5') {
|
||||||
|
if (*(++str_ref) != '\0') {
|
||||||
|
if (*str_ref == 'l') {
|
||||||
|
hideCursor();
|
||||||
|
} else if (*str_ref == 'h') {
|
||||||
|
showCursor();
|
||||||
|
} else {
|
||||||
|
// Invalid escape
|
||||||
|
}
|
||||||
|
} // Invalid escape (early termination)
|
||||||
|
} // Invalid escape
|
||||||
|
} // Invalid escape
|
||||||
|
return;
|
||||||
|
default:
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Read optional variable length number in ASCII (0x30 - 0x3f) where 0x3a - 0x3f are
|
||||||
|
// ignored (they are used as flags by some terminals)
|
||||||
|
uint8_t fnd0;
|
||||||
|
uint8_t num0 = readASCIINumber(str, &fnd0, &str);
|
||||||
|
|
||||||
|
// Read optional (semicolon followed by optional variable length number)
|
||||||
|
uint8_t fnd1;
|
||||||
|
uint8_t num1;
|
||||||
|
if (*str != '\0' && *str == ';') {
|
||||||
|
num1 = readASCIINumber(++str, &fnd1, &str);
|
||||||
|
|
||||||
|
// Read control character (between 0x40 - 0x7e) for two argument sequences
|
||||||
|
switch (*str) {
|
||||||
|
case 'f': // HVP - Horizontal and vertical position
|
||||||
|
case 'H': // CUP - Cursor position
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
num1 = fnd1 ? num1 : 1;
|
||||||
|
setCursorPosition(num0, num1);
|
||||||
|
break;
|
||||||
|
default: // Invalid control character
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
} else if (*str != '\0') {
|
||||||
|
// Read control character (between 0x40 - 0x7e) for single argument sequences
|
||||||
|
switch (*str) {
|
||||||
|
case 'A': // CUU - Cursor up
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorUp(num0);
|
||||||
|
break;
|
||||||
|
case 'B': // CUD - Cursor down
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorDown(num0);
|
||||||
|
break;
|
||||||
|
case 'C': // CUF - Cursor forward
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorForward(num0);
|
||||||
|
break;
|
||||||
|
case 'D': // CUB - Cursor back
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorBackward(num0);
|
||||||
|
break;
|
||||||
|
case 'E': // CNL - Cursor next line
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorNextLine(num0);
|
||||||
|
break;
|
||||||
|
case 'F': // CPL - Cursor previous line
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorPreviousLine(num0);
|
||||||
|
break;
|
||||||
|
case 'G': // CHA - Cursor horizontal absolute
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
moveCursorToColumn(num0);
|
||||||
|
break;
|
||||||
|
case 'J': // ED - Erase display
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
eraseDisplay(num0);
|
||||||
|
break;
|
||||||
|
case 'K': // EL - Erase in line
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
eraseInline(num0);
|
||||||
|
break;
|
||||||
|
case 'S': // SU - Scroll up
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
scrollUp(num0);
|
||||||
|
break;
|
||||||
|
case 'T': // SD Scroll down
|
||||||
|
num0 = fnd0 ? num0 : 1;
|
||||||
|
scrollDown(num0);
|
||||||
|
break;
|
||||||
|
case 'm': // SGR - Select graphic rendition (single optional argument)
|
||||||
|
break;
|
||||||
|
case ';': // SGR - Select graphic rendition (multiple arguments)
|
||||||
|
if (fnd0) {
|
||||||
|
while (fnd0) {
|
||||||
|
readASCIINumber(++str, &fnd0, &str);
|
||||||
|
if (fnd0) {
|
||||||
|
if (*str == 'm') {
|
||||||
|
break; // Valid SGR
|
||||||
|
} else if (*str == ';') {
|
||||||
|
continue; // More SGR parameters yet
|
||||||
|
} else {
|
||||||
|
break; // Invalid escape
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
// Invalid escape; expected SGR parameter
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
// Invalid escape; expected first SGR parameter but none given
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case 'n': // DSR - Device status report
|
||||||
|
if (fnd0 && num0 == 6) {
|
||||||
|
// Valid DSR
|
||||||
|
} else {
|
||||||
|
// Invalid DSR
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
default: // Invalid control character
|
||||||
|
writeCharToLCD(*str);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
return; // Invalid escape sequence (terminated early)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
writeCharToLCD(*str);
|
||||||
|
}
|
||||||
|
|
||||||
|
str++;
|
||||||
|
#else
|
||||||
|
writeCharToLCD(*(str++));
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// LCD command functions (all have associated ANSI escape)
|
||||||
|
|
||||||
|
/*
|
||||||
|
Writes the CMD_CLEAR_DISPLAY command to the LCD using writeLCDINSTR, and clears the local
|
||||||
|
char and line counters.
|
||||||
|
*/
|
||||||
|
void clearDisplay(void) {
|
||||||
|
writeLCDInstr(CMD_CLEAR_DISPLAY);
|
||||||
|
|
||||||
|
// Reset line and char number tracking
|
||||||
|
currentLineNum = 0;
|
||||||
|
currentLineChars = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Writes the CMD_RETURN_HOME command to the LCD using writeLCDInstr, and clears the local char
|
||||||
|
and line counters.
|
||||||
|
*/
|
||||||
|
void returnHome(void) {
|
||||||
|
writeLCDInstr(CMD_RETURN_HOME);
|
||||||
|
|
||||||
|
// Reset line and char number tracking
|
||||||
|
currentLineNum = 0;
|
||||||
|
currentLineChars = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void getCursorPosition(uint8_t* row, uint8_t* column) {
|
||||||
|
*row = currentLineNum + 1;
|
||||||
|
*column = currentLineChars + 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
void setCursorPosition(uint8_t row, uint8_t column) {
|
||||||
|
// Set currentLineNum and currentLineChars
|
||||||
|
currentLineNum = row ? row - 1 : 0;
|
||||||
|
currentLineChars = column ? column - 1 : 0;
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorUp(uint8_t n) {
|
||||||
|
if (n < currentLineNum + 1) {
|
||||||
|
currentLineNum -= n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorDown(uint8_t n) {
|
||||||
|
if (n + currentLineNum < LCD_NUMBER_OF_LINES) {
|
||||||
|
currentLineNum += n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = LCD_NUMBER_OF_LINES - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorForward(uint8_t n) {
|
||||||
|
if (n + currentLineChars < LCD_CHARACTERS_PER_LINE) {
|
||||||
|
currentLineChars += n;
|
||||||
|
} else {
|
||||||
|
currentLineChars = LCD_CHARACTERS_PER_LINE - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorBackward(uint8_t n) {
|
||||||
|
if (n < currentLineChars + 1) {
|
||||||
|
currentLineChars -= n;
|
||||||
|
} else {
|
||||||
|
currentLineChars = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorNextLine(uint8_t n) {
|
||||||
|
currentLineChars = 0;
|
||||||
|
|
||||||
|
if (n + currentLineNum < LCD_NUMBER_OF_LINES) {
|
||||||
|
currentLineNum += n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = LCD_NUMBER_OF_LINES - 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorPreviousLine(uint8_t n) {
|
||||||
|
currentLineChars = 0;
|
||||||
|
|
||||||
|
if (n < currentLineNum + 1) {
|
||||||
|
currentLineNum -= n;
|
||||||
|
} else {
|
||||||
|
currentLineNum = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void moveCursorToColumn(uint8_t n) {
|
||||||
|
if (n <= LCD_CHARACTERS_PER_LINE) {
|
||||||
|
currentLineChars = n ? n - 1 : 0;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
} // else index out of range (off screen column)
|
||||||
|
}
|
||||||
|
|
||||||
|
void eraseDisplay(uint8_t n) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
switch (n) {
|
||||||
|
case 0: // Clear from cursor to end of screen
|
||||||
|
{
|
||||||
|
uint8_t len = (LCD_NUMBER_OF_LINES - old_row)*LCD_CHARACTERS_PER_LINE + (LCD_CHARACTERS_PER_LINE - old_column);
|
||||||
|
for (uint8_t i = 0; i < len; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
|
||||||
|
// Write last char without scrolling
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(' ');
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case 1: // Clear from cursor to beginning of screen
|
||||||
|
{
|
||||||
|
uint8_t len = (old_row - 1)*LCD_CHARACTERS_PER_LINE + old_column;
|
||||||
|
returnHome();
|
||||||
|
for (uint8_t i = 0; i < len; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
|
||||||
|
// Write last char without scrolling
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(' ');
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case 2: // Clear entire screen
|
||||||
|
clearDisplay();
|
||||||
|
break;
|
||||||
|
default: // Invalid argument; do nothing
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
|
||||||
|
void eraseInline(uint8_t n) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
switch (n) {
|
||||||
|
case 0: // Clear from cursor to end of line
|
||||||
|
for (uint8_t i = old_column; i <= LCD_CHARACTERS_PER_LINE; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
break;
|
||||||
|
case 1: // Clear from cursor to beginning of line
|
||||||
|
setCursorPosition(old_row, 1);
|
||||||
|
for (uint8_t i = 1; i <= old_column; i++)
|
||||||
|
writeCharToLCD(' ');
|
||||||
|
break;
|
||||||
|
case 2: // Clear entire line
|
||||||
|
setCursorPosition(old_row, 1);
|
||||||
|
for (uint8_t i = 1; i <= LCD_CHARACTERS_PER_LINE; i++) {
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(' ');
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
default: // Invalid argument; do nothing
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
|
||||||
|
void scrollUp(uint8_t n) {
|
||||||
|
#if LCD_NUMBER_OF_LINES == 1
|
||||||
|
clearDisplay();
|
||||||
|
#else
|
||||||
|
if (n >= LCD_NUMBER_OF_LINES) {
|
||||||
|
clearDisplay();
|
||||||
|
} else {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
uint8_t len = (LCD_NUMBER_OF_LINES - n)*LCD_CHARACTERS_PER_LINE + 1;
|
||||||
|
char str[len];
|
||||||
|
readCharsFromLCD(n + 1, 1, LCD_NUMBER_OF_LINES, LCD_CHARACTERS_PER_LINE, str, len);
|
||||||
|
setCursorPosition(1, 1); // returnHome();
|
||||||
|
writeStringToLCD(str);
|
||||||
|
|
||||||
|
// Add n newlines to bottom of screen
|
||||||
|
for (uint8_t i = 0; i < n; i++) {
|
||||||
|
setCursorPosition(LCD_NUMBER_OF_LINES - i, 1);
|
||||||
|
eraseInline(2);
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
void scrollDown(uint8_t n) {
|
||||||
|
#if LCD_NUMBER_OF_LINES == 1
|
||||||
|
clearDisplay();
|
||||||
|
#else
|
||||||
|
if (n >= LCD_NUMBER_OF_LINES) {
|
||||||
|
clearDisplay();
|
||||||
|
} else {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
uint8_t len = (LCD_NUMBER_OF_LINES - n)*LCD_CHARACTERS_PER_LINE + 1;
|
||||||
|
char str[len];
|
||||||
|
readCharsFromLCD(1, 1, LCD_NUMBER_OF_LINES - n, LCD_CHARACTERS_PER_LINE, str, len);
|
||||||
|
|
||||||
|
for (uint8_t column = n + 1, i = 0; column <= LCD_NUMBER_OF_LINES; column++) {
|
||||||
|
setCursorPosition(column , 1);
|
||||||
|
for (uint8_t row = 1; row <= LCD_CHARACTERS_PER_LINE; row++) {
|
||||||
|
loop_until_LCD_BF_clear();
|
||||||
|
writeCharToLCD_(str[i++]);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Add n newlines to top of screen
|
||||||
|
for (uint8_t i = 1; i <= n; i++) {
|
||||||
|
setCursorPosition(i, 1);
|
||||||
|
eraseInline(2);
|
||||||
|
}
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
void saveCursorPosition() {
|
||||||
|
saveCursorLineNum = currentLineNum;
|
||||||
|
saveCursorLineChars = currentLineChars;
|
||||||
|
}
|
||||||
|
|
||||||
|
void restoreCursorPosition() {
|
||||||
|
currentLineNum = saveCursorLineNum;
|
||||||
|
currentLineChars = saveCursorLineChars;
|
||||||
|
writeLCDInstr(INSTR_DDRAM_ADDR | (lineBeginnings[currentLineNum] + currentLineChars));
|
||||||
|
}
|
||||||
|
|
||||||
|
void hideCursor(void) {
|
||||||
|
lcdState &= ~(1 << INSTR_DISPLAY_C);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void showCursor(void) {
|
||||||
|
lcdState |= (1 << INSTR_DISPLAY_C);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
//-----------------------------------------------------------------------------------------------
|
||||||
|
// Utility functions (with no associated ASCII or ANSI escape)
|
||||||
|
|
||||||
|
void blinkCursorOff(void) {
|
||||||
|
lcdState &= ~(1 << INSTR_DISPLAY_B);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void blinkCursorOn(void) {
|
||||||
|
lcdState |= (1 << INSTR_DISPLAY_B);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void displayOff(void) {
|
||||||
|
lcdState &= ~(1 << INSTR_DISPLAY_D);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
void displayOn(void) {
|
||||||
|
lcdState |= (1 << INSTR_DISPLAY_D);
|
||||||
|
writeLCDInstr(INSTR_DISPLAY | lcdState);
|
||||||
|
}
|
||||||
|
|
||||||
|
//-----------------------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
char readCharFromLCD(uint8_t row, uint8_t column) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
|
||||||
|
setCursorPosition(row, column);
|
||||||
|
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
char c = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
return c;
|
||||||
|
}
|
||||||
|
|
||||||
|
void readLCDLine(uint8_t i, char* str) {
|
||||||
|
readCharsFromLCD(i, 1, i, LCD_CHARACTERS_PER_LINE, str, LCD_CHARACTERS_PER_LINE + 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Advanced functions for special cases
|
||||||
|
|
||||||
|
void readCharsFromLCD(uint8_t from_row, uint8_t from_column, uint8_t to_row, uint8_t to_column, char* str, uint8_t len) {
|
||||||
|
uint8_t old_row, old_column;
|
||||||
|
getCursorPosition(&old_row, &old_column);
|
||||||
|
setCursorPosition(from_row, from_column);
|
||||||
|
|
||||||
|
for (uint8_t i = 0; i < len - 1 && from_row <= to_row; i++) {
|
||||||
|
if (from_row == LCD_NUMBER_OF_LINES && from_column == LCD_CHARACTERS_PER_LINE) {
|
||||||
|
// Last character on screen
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
*(str++) = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
} else if (from_column == LCD_CHARACTERS_PER_LINE) { // End of line (but not last one)
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
*(str++) = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
from_row += 1;
|
||||||
|
from_column = 1;
|
||||||
|
setCursorPosition(from_row, from_column);
|
||||||
|
} else {
|
||||||
|
loop_until_LCD_BF_clear(); // Wait until LCD is ready for new instructions
|
||||||
|
setLCDDBusAsInputs();
|
||||||
|
*(str++) = readLCDDBusByte_();
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
from_column++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Ensure array is terminated with null character
|
||||||
|
*str = '\0';
|
||||||
|
|
||||||
|
setCursorPosition(old_row, old_column);
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
Initialize LCD using the internal reset circuitry.
|
||||||
|
|
||||||
|
Note: This currently only works with 8 bit modes, but is not recommended. Instead use the
|
||||||
|
initLCD function which uses the software initialization method and works for 8-bit
|
||||||
|
modes as well the 4-bit mode.
|
||||||
|
*/
|
||||||
|
void initLCDByInternalReset(void) {
|
||||||
|
setLCDDBusAsOutputs();
|
||||||
|
|
||||||
|
// Function set (8-bit interface; 2 lines with 5x7 dot character font)
|
||||||
|
writeLCDInstr_(INSTR_FUNC_SET | (1 << INSTR_FUNC_SET_DL) | (1 << INSTR_FUNC_SET_N));
|
||||||
|
|
||||||
|
writeLCDInstr_(0x0F);
|
||||||
|
writeLCDInstr_(0x06);
|
||||||
|
writeLCDInstr_(CMD_CLEAR_DISPLAY);
|
||||||
|
_delay_ms(LCD_CLEAR_DISPLAY_DELAY);
|
||||||
|
}
|
|
@ -1 +0,0 @@
|
||||||
../../lcdLib.h
|
|
|
@ -0,0 +1,328 @@
|
||||||
|
/**
|
||||||
|
* (C) Copyright Collin J. Doering 2015
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file lcdLib.h
|
||||||
|
* @author Collin J. Doering <collin.doering@rekahsoft.ca>
|
||||||
|
* @date Sep 29, 2015
|
||||||
|
* @brief Functions to initialize, and operate a character LCD.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef LCD_LIB_H
|
||||||
|
#define LCD_LIB_H
|
||||||
|
|
||||||
|
// Includes -----------------------------------------------------------------------------------
|
||||||
|
#include "lcd_instr.h"
|
||||||
|
#include "lcdLibConfig.h"
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Library function declarations
|
||||||
|
|
||||||
|
/**
|
||||||
|
Initialize the LCD display via software initialization as specified by the datasheet.
|
||||||
|
*/
|
||||||
|
void initLCD(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Writes a character to the LCD display at the current cursor position after the LCD display is
|
||||||
|
ready for new data. Allows the following ASCII escapes: '\n', '\r', '\f' and '\b'; ignores
|
||||||
|
ASCII escape '\a'.
|
||||||
|
*/
|
||||||
|
void writeCharToLCD(char);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Writes a string to the LCD starting from the current cursor position.
|
||||||
|
*/
|
||||||
|
void writeStringToLCD(char*);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// LCD command functions (all have associated ANSI escape)
|
||||||
|
|
||||||
|
/**
|
||||||
|
Clears the display and positions the cursor in the top left of the LCD screen.
|
||||||
|
*/
|
||||||
|
void clearDisplay(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Brings the cursor the the top left of the LCD screen.
|
||||||
|
*/
|
||||||
|
void returnHome(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Gets the current row and column of the LCD cursor and sets given pointers row and column to
|
||||||
|
their respective values. Note indexes start at 1.
|
||||||
|
*/
|
||||||
|
void getCursorPosition(uint8_t* row, uint8_t* column);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Using the given parameters row and column, sets the current row and column occupied by the LCD
|
||||||
|
cursor. Note indexes start at 1.
|
||||||
|
*/
|
||||||
|
void setCursorPosition(uint8_t row, uint8_t column);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions up. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorUp(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions down. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorDown(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions forward. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorForward(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor n positions backwards. If the cursor is at the edge of the screen this has no effect.
|
||||||
|
*/
|
||||||
|
void moveCursorBackward(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor to the beginning of the line n lines down.
|
||||||
|
*/
|
||||||
|
void moveCursorNextLine(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor to the beginning of the line n lines up.
|
||||||
|
*/
|
||||||
|
void moveCursorPreviousLine(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Moves the cursor to column n. If n is off screen go to the last line.
|
||||||
|
*/
|
||||||
|
void moveCursorToColumn(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Scroll whole page up by n lines. New lines are added at the bottom.
|
||||||
|
*/
|
||||||
|
void scrollUp(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Scroll whole page down by n lines. New lines are added at the top.
|
||||||
|
*/
|
||||||
|
void scrollDown(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Saves the cursors current position.
|
||||||
|
*/
|
||||||
|
void saveCursorPosition(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Restores the last saved cursor position.
|
||||||
|
*/
|
||||||
|
void restoreCursorPosition(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Clears part or all of screen dependent on the value of n:
|
||||||
|
0 or missing: clear from cursor to end of screen
|
||||||
|
1: clear from cursor to end of screen
|
||||||
|
2: clear entire screen
|
||||||
|
*/
|
||||||
|
void eraseDisplay(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Erases part of a line dependent on the value of n:
|
||||||
|
0 or missing: clear from cursor to end of the line
|
||||||
|
1: clear from cursor to beginning of the line
|
||||||
|
2: clear entire line
|
||||||
|
*/
|
||||||
|
void eraseInline(uint8_t n);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Hides the cursor
|
||||||
|
*/
|
||||||
|
void hideCursor(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Shows the cursor
|
||||||
|
*/
|
||||||
|
void showCursor(void);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Utility functions (with no associated ASCII or ANSI escape)
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the cursor blink off.
|
||||||
|
*/
|
||||||
|
void blinkCursorOff(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the cursor blink on.
|
||||||
|
*/
|
||||||
|
void blinkCursorOn(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the display off.
|
||||||
|
*/
|
||||||
|
void displayOff(void);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Turns the display on.
|
||||||
|
*/
|
||||||
|
void displayOn(void);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
/**
|
||||||
|
Read a single character from the row and column given (1 based) returning the cursor to
|
||||||
|
its previous original position.
|
||||||
|
*/
|
||||||
|
char readCharFromLCD(uint8_t row, uint8_t column);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Read a line i (ones based) into str.
|
||||||
|
*/
|
||||||
|
void readLCDLine(uint8_t i, char* str);
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Advanced functions for special cases
|
||||||
|
|
||||||
|
/**
|
||||||
|
Read len characters from (from_row, from_column) to (to_row, to_column) returning the cursor
|
||||||
|
to its original position after the read. Upon success (not overflowing the screen), 0 is
|
||||||
|
returned; otherwise non zero will be returned. The str pointer will be updated with the
|
||||||
|
characters read from the screen. Even in the case of failure, str may be partially populated.
|
||||||
|
*/
|
||||||
|
void readCharsFromLCD(uint8_t from_row, uint8_t from_column, uint8_t to_row, uint8_t to_column, char* str, uint8_t len);
|
||||||
|
|
||||||
|
/**
|
||||||
|
Initialize the LCD display via its internal reset circuit.
|
||||||
|
|
||||||
|
Note: this is not the recommended way to initialize the LCD as it is unreliable and depends
|
||||||
|
on the power supply. Preferably the software initialization method should be used (via
|
||||||
|
the initLCD function).
|
||||||
|
*/
|
||||||
|
void initLCDByInternalReset(void);
|
||||||
|
|
||||||
|
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
// Mode and settings sanity check (preprocessor tests of lcdLibConfig.h)
|
||||||
|
//---------------------------------------------------------------------------------------------
|
||||||
|
|
||||||
|
#if !defined(LCD_CHARACTERS_PER_LINE)
|
||||||
|
#error "All modes require LCD_CHARACTERS_PER_LINE to be defined."
|
||||||
|
#elif !defined(LCD_NUMBER_OF_LINES)
|
||||||
|
#error "All modes require LCD_NUMBER_OF_LINES to be defined."
|
||||||
|
#elif !defined(LCD_LINE_BEGINNINGS)
|
||||||
|
#error "All modes require LCD_LINE_BEGINNINGS to be defined."
|
||||||
|
#else
|
||||||
|
|
||||||
|
#if LCD_NUMBER_OF_LINES == 1
|
||||||
|
#define LCD_LINES 0
|
||||||
|
#else
|
||||||
|
#define LCD_LINES (1 << INSTR_FUNC_SET_N)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define LCD_CHARACTERS_PER_SCREEN (LCD_CHARACTERS_PER_LINE * LCD_NUMBER_OF_LINES)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if !defined(LCD_FONT_5x8) &&\
|
||||||
|
!defined(LCD_FONT_5x10)
|
||||||
|
#error "All modes require LCD_FONT_5x8 or LCD_FONT_5x10 to be defined."
|
||||||
|
#elif defined(LCD_FONT_5x8) && \
|
||||||
|
defined(LCD_FONT_5x10)
|
||||||
|
#error "LCD_FONT_5x8 and LCD_FONT_5x10 are mutually exclusive. Choose one."
|
||||||
|
#elif defined(LCD_FONT_5x8)
|
||||||
|
#define LCD_FONT 0
|
||||||
|
#elif defined(LCD_FONT_5x10)
|
||||||
|
#define LCD_FONT (1 << INSTR_FUNC_SET_F)
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if !defined (LCD_RS) || \
|
||||||
|
!defined (LCD_RS_PORT) || \
|
||||||
|
!defined (LCD_RS_DDR) || \
|
||||||
|
!defined (LCD_RW) || \
|
||||||
|
!defined (LCD_RW_PORT) || \
|
||||||
|
!defined (LCD_RW_DDR) || \
|
||||||
|
!defined (LCD_ENABLE) || \
|
||||||
|
!defined (LCD_ENABLE_PORT) || \
|
||||||
|
!defined (LCD_ENABLE_DDR)
|
||||||
|
#error "All modes require LCD_RS[,_PORT,_DDR], LCD_RW[,_PORT,_DDR], and LCD_ENABLE[,_PORT,_DDR] be defined."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if defined (EIGHT_BIT_ARBITRARY_PIN_MODE) && \
|
||||||
|
defined (FOUR_BIT_MODE)
|
||||||
|
#error "EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE are mutually exclusive. Choose one."
|
||||||
|
#elif defined (EIGHT_BIT_ARBITRARY_PIN_MODE) || \
|
||||||
|
defined (FOUR_BIT_MODE)
|
||||||
|
|
||||||
|
// EIGHT_BIT_ARBITRARY_PIN_MODE specific requirements
|
||||||
|
#ifdef EIGHT_BIT_ARBITRARY_PIN_MODE
|
||||||
|
#if !defined (LCD_DBUS0) || \
|
||||||
|
!defined (LCD_DBUS0_PORT) || \
|
||||||
|
!defined (LCD_DBUS0_DDR) || \
|
||||||
|
!defined (LCD_DBUS0_PIN) || \
|
||||||
|
!defined (LCD_DBUS1) || \
|
||||||
|
!defined (LCD_DBUS1_PORT) || \
|
||||||
|
!defined (LCD_DBUS1_DDR) || \
|
||||||
|
!defined (LCD_DBUS1_PIN) || \
|
||||||
|
!defined (LCD_DBUS2) || \
|
||||||
|
!defined (LCD_DBUS2_PORT) || \
|
||||||
|
!defined (LCD_DBUS2_DDR) || \
|
||||||
|
!defined (LCD_DBUS2_PIN) || \
|
||||||
|
!defined (LCD_DBUS3) || \
|
||||||
|
!defined (LCD_DBUS3_PORT) || \
|
||||||
|
!defined (LCD_DBUS3_DDR) || \
|
||||||
|
!defined (LCD_DBUS3_PIN)
|
||||||
|
#error "EIGHT_BIT_ARBITRARY_PIN_MODE require that LCD_DBUS*[,_PORT,_DDR,_PIN] be defined."
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
|
|
||||||
|
// Requirements for EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE
|
||||||
|
#if !defined (LCD_DBUS4) || \
|
||||||
|
!defined (LCD_DBUS4_PORT) || \
|
||||||
|
!defined (LCD_DBUS4_DDR) || \
|
||||||
|
!defined (LCD_DBUS4_PIN) || \
|
||||||
|
!defined (LCD_DBUS5) || \
|
||||||
|
!defined (LCD_DBUS5_PORT) || \
|
||||||
|
!defined (LCD_DBUS5_DDR) || \
|
||||||
|
!defined (LCD_DBUS5_PIN) || \
|
||||||
|
!defined (LCD_DBUS6) || \
|
||||||
|
!defined (LCD_DBUS6_PORT) || \
|
||||||
|
!defined (LCD_DBUS6_DDR) || \
|
||||||
|
!defined (LCD_DBUS6_PIN) || \
|
||||||
|
!defined (LCD_DBUS7) || \
|
||||||
|
!defined (LCD_DBUS7_PORT) || \
|
||||||
|
!defined (LCD_DBUS7_DDR) || \
|
||||||
|
!defined (LCD_DBUS7_PIN)
|
||||||
|
#error "Both EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE require that LCD_DBUS*[,_PORT,_DDR,_PIN] be defined."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
// Set LCD_BF automatically for both EIGHT_BIT_ARBITRARY_PIN_MODE and FOUR_BIT_MODE
|
||||||
|
#undef LCD_BF
|
||||||
|
#define LCD_BF LCD_DBUS7
|
||||||
|
|
||||||
|
#else
|
||||||
|
#if !defined (LCD_DBUS_PORT) || \
|
||||||
|
!defined (LCD_DBUS_DDR) || \
|
||||||
|
!defined (LCD_DBUS_PIN) || \
|
||||||
|
!defined (LCD_BF)
|
||||||
|
#error "Default mode requires that LCD_DBUS_[PORT,DDR,PIN] and LCD_BF be defined."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#undef LCD_DBUS7_PORT
|
||||||
|
#define LCD_DBUS7_PORT LCD_DBUS_PORT
|
||||||
|
#undef LCD_DBUS7_DDR
|
||||||
|
#define LCD_DBUS7_DDR LCD_DBUS_DDR
|
||||||
|
#undef LCD_DBUS7_PIN
|
||||||
|
#define LCD_DBUS7_PIN LCD_DBUS_PIN
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#endif /* LCD_LIB_H */
|
|
@ -1 +0,0 @@
|
||||||
../../lcd_instr.h
|
|
|
@ -0,0 +1,61 @@
|
||||||
|
/**
|
||||||
|
* (C) Copyright Collin J. Doering 2015
|
||||||
|
*
|
||||||
|
* This program is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @file lcd_instr.h
|
||||||
|
* @author Collin J. Doering <collin.doering@rekahsoft.ca>
|
||||||
|
* @date Oct 26, 2015
|
||||||
|
* @brief Constant macro definitions of HD44780 compatible character LCD instruction set
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
LCD character display instructions
|
||||||
|
*/
|
||||||
|
|
||||||
|
// Simple instructions with no options
|
||||||
|
#define CMD_INIT 0x30
|
||||||
|
#define CMD_INIT_FOUR_BIT 0x20
|
||||||
|
#define CMD_CLEAR_DISPLAY 0x01
|
||||||
|
#define CMD_RETURN_HOME 0x02
|
||||||
|
|
||||||
|
// Entry Set instruction and associated options
|
||||||
|
#define INSTR_ENTRY_SET 0x04
|
||||||
|
#define INSTR_ENTRY_SET_ID 1
|
||||||
|
#define INSTR_ENTRY_SET_S 0
|
||||||
|
|
||||||
|
// Display control instruction and associated options
|
||||||
|
#define INSTR_DISPLAY 0x08
|
||||||
|
#define INSTR_DISPLAY_D 2
|
||||||
|
#define INSTR_DISPLAY_C 1
|
||||||
|
#define INSTR_DISPLAY_B 0
|
||||||
|
|
||||||
|
// Cursor or display shift instruction and associated options
|
||||||
|
#define INSTR_MOV_SHIFT 0x10
|
||||||
|
#define INSTR_MOV_SHIFT_SC 3
|
||||||
|
#define INSTR_MOV_SHIFT_RL 2
|
||||||
|
|
||||||
|
// Function set instruction and associated options
|
||||||
|
#define INSTR_FUNC_SET 0x20
|
||||||
|
#define INSTR_FUNC_SET_DL 4
|
||||||
|
#define INSTR_FUNC_SET_N 3
|
||||||
|
#define INSTR_FUNC_SET_F 2
|
||||||
|
|
||||||
|
// Set CG RAM address instruction
|
||||||
|
#define INSTR_CGRAM_ADDR 0x60
|
||||||
|
|
||||||
|
// Set DD RAM address instruction
|
||||||
|
#define INSTR_DDRAM_ADDR 0x80
|
Loading…
Reference in New Issue