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#include "matrix.h"
#include "gpio.h"
static uint8_t read_rows(void) {
return (readPin(C7) ? 0 : 1) |
(readPin(B1) ? 0 : 2) |
(readPin(B2) ? 0 : 4) |
(readPin(C6) ? 0 : 8) |
(readPin(B4) ? 0 : 16) |
(readPin(B5) ? 0 : 32);
}
static void select_col(uint8_t col) {
writePinLow(D3);
writePin(D4, (col & 1));
writePin(D5, (col & 2));
writePin(D6, (col & 4));
writePin(D7, (col & 8));
}
static void unselect_cols(void) {
writePinHigh(D3);
}
void matrix_init_custom(void) {
/* 74HC154 col pin configuration
* pin: D3 D7 D6 D5 D4
* row: off 0 x x x x
* 0 1 0 0 0 0
* 1 1 0 0 0 1
* 2 1 0 0 1 0
* 3 1 0 0 1 1
* 4 1 0 1 0 0
* 5 1 0 1 0 1
* 6 1 0 1 1 0
* 7 1 0 1 1 1
* 8 1 1 0 0 0
* 9 1 1 0 0 1
* 10 1 1 0 1 0
* 11 1 1 0 1 1
* 12 1 1 1 0 0
* 13 1 1 1 0 1
* 14 1 1 1 1 0
* 15 1 1 1 1 1
*/
setPinOutput(D3);
writePinHigh(D3);
setPinOutput(D4);
setPinOutput(D5);
setPinOutput(D6);
setPinOutput(D7);
/* Row pin configuration
*
* row: 0 1 2 3 4 5
* pin: C7 B1 B2 C6 B4 B5
*
*/
setPinInputHigh(C7);
setPinInputHigh(B1);
setPinInputHigh(B2);
setPinInputHigh(C6);
setPinInputHigh(B4);
setPinInputHigh(B5);
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool changed = false;
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
select_col(col);
matrix_io_delay();
uint8_t rows = read_rows();
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
bool prev_bit = current_matrix[row] & ((matrix_row_t)1 << col);
bool curr_bit = rows & (1 << row);
if (prev_bit != curr_bit) {
current_matrix[row] ^= ((matrix_row_t)1 << col);
changed = true;
}
}
unselect_cols();
}
return changed;
}
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