62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/**
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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 lcd_instr.h
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* @author Collin J. Doering <collin.doering@rekahsoft.ca>
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* @date Oct 26, 2015
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* @brief Constant macro definitions of HD44780 compatible character LCD instruction set
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*/
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/*
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LCD character display instructions
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*/
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// Simple instructions with no options
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#define CMD_INIT 0x30
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#define CMD_INIT_FOUR_BIT 0x20
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#define CMD_CLEAR_DISPLAY 0x01
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#define CMD_RETURN_HOME 0x02
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// Entry Set instruction and associated options
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#define INSTR_ENTRY_SET 0x04
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#define INSTR_ENTRY_SET_ID 1
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#define INSTR_ENTRY_SET_S 0
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// Display control instruction and associated options
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#define INSTR_DISPLAY 0x08
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#define INSTR_DISPLAY_D 2
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#define INSTR_DISPLAY_C 1
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#define INSTR_DISPLAY_B 0
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// Cursor or display shift instruction and associated options
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#define INSTR_MOV_SHIFT 0x10
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#define INSTR_MOV_SHIFT_SC 3
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#define INSTR_MOV_SHIFT_RL 2
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// Function set instruction and associated options
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#define INSTR_FUNC_SET 0x20
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#define INSTR_FUNC_SET_DL 4
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#define INSTR_FUNC_SET_N 3
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#define INSTR_FUNC_SET_F 2
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// Set CG RAM address instruction
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#define INSTR_CGRAM_ADDR 0x60
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// Set DD RAM address instruction
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#define INSTR_DDRAM_ADDR 0x80
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