qmk-firmware/keyboards/converter/ibm_5291/matrix.c

285 lines
6.6 KiB
C

/*
Copyright 2018 listofoptions <listofoptions@gmail.com>
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 2 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/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#if defined(__AVR__)
#include <avr/io.h>
#endif
#include <util/delay.h>
#include "wait.h"
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "timer.h"
#include "config.h"
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
#define print_matrix_header() print("\nr/c 01234567\n")
#define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
#define matrix_bitpop(i) bitpop(matrix[i])
#define ROW_SHIFTER ((uint8_t)1)
#define check_bit(var,pos) ((var) & (1<<(pos)))
#define NUM_ROW_PINS 5
#define NUM_COL_PINS 2
static const uint8_t row_pins [NUM_ROW_PINS] = MATRIX_ROW_PINS ;
static const uint8_t col_pins [NUM_ROW_PINS] = MATRIX_COL_PINS ;
#if ( DEBOUNCE > 0 )
static uint16_t debouncing_time ;
static bool debouncing = false ;
#endif
static uint8_t matrix [MATRIX_ROWS] = {0};
#if ( DEBOUNCE > 0 )
static uint8_t matrix_debounce [MATRIX_ROWS] = {0};
#endif
static
inline
void toggle_led(void) {
uint8_t pin = LED_PIN ;
_SFR_IO8((pin >> 4) + 2) ^= _BV(pin & 0xF);
}
static
inline
void init_led(void) {
uint8_t pin = LED_PIN ;
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
static
inline
void init_data(void) {
uint8_t pin = MATRIX_DATA_PIN ;
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // LO
}
static
inline
void init_strobe(void) {
uint8_t pin = MATRIX_STROBE_PIN ;
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
}
static
inline
void init_rows(void) {
for ( uint8_t i = 0 ; i < NUM_ROW_PINS; ++i ) {
uint8_t pin = row_pins[i];
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
}
static
inline
void init_cols(void) {
for ( uint8_t i = 0 ; i < NUM_COL_PINS; ++i ) {
uint8_t pin = col_pins[i];
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
}
static
inline
void select_row(uint8_t current_row) {
for ( uint8_t i = 0 ; i < NUM_ROW_PINS; ++i ) {
uint8_t pin = row_pins[i] ;
if ( check_bit( current_row, i ) ) {
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
} else {
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
}
wait_us(30) ;
}
static
inline
void select_col(uint8_t current_col) {
for ( uint8_t i = 0 ; i < NUM_COL_PINS; ++i ) {
uint8_t pin = col_pins[i] ;
if ( check_bit( current_col, i ) ) {
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
} else {
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
}
}
wait_us(30) ;
}
static
inline
uint8_t matrix_strobe(uint8_t col_index) {
uint8_t strobe_pin = MATRIX_STROBE_PIN ;
uint8_t data_pin = MATRIX_DATA_PIN ;
// set strobe pin low
_SFR_IO8((strobe_pin >> 4) + 2) &= ~_BV(strobe_pin & 0xF);
wait_us(30) ;
// read data
uint8_t data = (_SFR_IO8(data_pin >> 4) & _BV(data_pin & 0xF)) ;
// set strobe pin hi
_SFR_IO8((strobe_pin >> 4) + 2) |= _BV(strobe_pin & 0xF);
uint8_t out = data ? (1 << col_index) : 0 ;
return out ;
}
static
bool matrix_read(uint8_t current_matrix[], uint8_t current_row) {
// Store last value of row prior to reading
uint8_t last_row_value = current_matrix[current_row];
// Clear data in matrix row
current_matrix[current_row] = 0;
select_row(current_row);
// For each col...
for(uint8_t col_index = 0; col_index < MATRIX_COLS; ++col_index) {
select_col(col_index) ;
// strobe the matrix
// Populate the matrix row with the state of the data pin
current_matrix[current_row] |= matrix_strobe(col_index) ;
}
bool test = last_row_value != current_matrix[current_row] ;
return test ;
}
__attribute__ ((weak))
void matrix_init_quantum(void) {
matrix_init_kb();
}
__attribute__ ((weak))
void matrix_scan_quantum(void) {
matrix_scan_kb();
}
__attribute__ ((weak))
void matrix_init_kb(void) {
matrix_init_user();
}
__attribute__ ((weak))
void matrix_scan_kb(void) {
matrix_scan_user();
}
__attribute__ ((weak))
void matrix_init_user(void) {
}
__attribute__ ((weak))
void matrix_scan_user(void) {
}
inline
uint8_t matrix_rows(void) {
return MATRIX_ROWS;
}
inline
uint8_t matrix_cols(void) {
return MATRIX_COLS;
}
inline
uint8_t matrix_get_row(uint8_t row) {
return matrix[row];
}
void matrix_init(void) {
init_led() ;
init_rows() ;
init_cols() ;
init_data() ;
init_strobe() ;
// initialize matrix state: all keys off
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
# if (DEBOUNCE > 0)
matrix_debounce [i] = 0;
# endif
}
matrix_init_quantum() ;
}
uint8_t matrix_scan(void) {
for ( uint8_t current_row = 0; current_row < MATRIX_ROWS; ++current_row ) {
# if (DEBOUNCE > 0)
bool matrix_changed = matrix_read(matrix_debounce, current_row);
if (matrix_changed) {
debouncing = true ;
debouncing_time = timer_read();
}
# else
matrix_read(matrix, current_row);
# endif
}
# if (DEBOUNCE > 0)
if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
matrix[i] = matrix_debounce[i];
}
debouncing = false;
}
# endif
matrix_scan_quantum();
return 1;
}
void matrix_print(void) {
print_matrix_header();
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
phex(row); print(": ");
print_matrix_row(row);
print("\n");
}
}