mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-29 22:45:51 +00:00
99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/* Copyright 2019
|
|
*
|
|
* 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 <avr/io.h>
|
|
#include <string.h>
|
|
#include "matrix.h"
|
|
#include "pca9555.h"
|
|
#include "quantum.h"
|
|
|
|
#include "debug.h"
|
|
|
|
// PCA9555 slave addresses
|
|
#define IC1 0x20
|
|
#define IC2 0x21
|
|
|
|
//_____Utility funcs___________________________________________________________
|
|
|
|
static void init_pins(void) {
|
|
// init all rows - IC1 port0 input
|
|
pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT); // same as initial state
|
|
|
|
// init all cols high - IC2 all input
|
|
pca9555_set_config(IC1, PCA9555_PORT1, ALL_INPUT); // same as initial state
|
|
pca9555_set_config(IC2, PCA9555_PORT0, ALL_INPUT); // same as initial state
|
|
pca9555_set_config(IC2, PCA9555_PORT1, ALL_INPUT); // same as initial state
|
|
|
|
pca9555_set_output(IC1, PCA9555_PORT0, ALL_LOW);
|
|
}
|
|
|
|
static void select_row(uint8_t row) {
|
|
// For the Southpaw Ext 65% pins 1-6 are used for the rows
|
|
uint8_t pin = row;
|
|
uint8_t mask = 2 << pin;
|
|
|
|
pca9555_set_config(IC1, PCA9555_PORT0, ALL_INPUT & (~mask));
|
|
}
|
|
|
|
static uint32_t read_cols(void) {
|
|
//Read column inputs. Pins 13-31 are used. Split across both ICs but they are sequential
|
|
uint8_t state_1 = 0;
|
|
uint8_t state_2 = 0;
|
|
uint8_t state_3 = 0;
|
|
pca9555_readPins(IC2, PCA9555_PORT0, &state_1);
|
|
pca9555_readPins(IC2, PCA9555_PORT1, &state_2);
|
|
pca9555_readPins(IC1, PCA9555_PORT1, &state_3);
|
|
|
|
uint32_t state = ((((uint32_t)state_3 & 0b01111111) << 12) | ((uint32_t)state_2 << 4) | (((uint32_t)state_1 & 0b11110000) >> 4));
|
|
return ~state;
|
|
}
|
|
|
|
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
|
|
// Store last value of row prior to reading
|
|
matrix_row_t last_row_value = current_matrix[current_row];
|
|
|
|
// Clear data in matrix row
|
|
current_matrix[current_row] = 0;
|
|
|
|
// Select row and wait for row selection to stabilize
|
|
select_row(current_row);
|
|
// Skip the wait_us(30); as i2c is slow enough to debounce the io changes
|
|
|
|
current_matrix[current_row] = read_cols();
|
|
|
|
// No need to Unselect row as the next `select_row` will blank everything
|
|
|
|
return (last_row_value != current_matrix[current_row]);
|
|
}
|
|
|
|
//_____CUSTOM MATRIX IMPLEMENTATION____________________________________________________
|
|
|
|
void matrix_init_custom(void) {
|
|
pca9555_init(IC1);
|
|
pca9555_init(IC2);
|
|
|
|
init_pins();
|
|
}
|
|
|
|
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
|
|
bool changed = false;
|
|
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
|
|
changed |= read_cols_on_row(current_matrix, current_row);
|
|
}
|
|
return changed;
|
|
}
|