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#include "keymap.h"
#include "matrix.h"
#include "pico/types.h"
#include "hardware/gpio.h"
#include "hardware/timer.h"
#include <string.h>
static const uint matrix_row_pins[] = { 4, 5, 6, 7 };
static const uint matrix_col_pins[] = { 29, 28, 27, 26, 22, 20 };
static_assert(ARRLEN(matrix_row_pins) == KEY_ROWS);
static_assert(ARRLEN(matrix_col_pins) == KEY_COLS);
bool prev_state_matrix[KEY_COUNT];
bool state_matrix[KEY_COUNT];
void
matrix_init(void)
{
uint x, y;
for (y = 0; y < KEY_ROWS; y++) {
gpio_init(matrix_row_pins[y]);
gpio_set_dir(matrix_row_pins[y], GPIO_IN);
gpio_pull_up(matrix_row_pins[y]);
}
for (x = 0; x < KEY_COLS; x++) {
gpio_init(matrix_col_pins[x]);
gpio_set_dir(matrix_col_pins[x], GPIO_OUT);
}
}
void
scan_matrix(void)
{
bool pressed;
uint x, y;
memcpy(prev_state_matrix, state_matrix, sizeof(state_matrix));
for (y = 0; y < KEY_ROWS; y++) {
for (x = 0; x < KEY_COLS; x++) {
gpio_put(matrix_col_pins[x], 0);
busy_wait_us(5);
pressed = !gpio_get(matrix_row_pins[y]);
state_matrix[y * KEY_COLS + x] = pressed;
gpio_put(matrix_col_pins[x], 1);
busy_wait_us(5);
}
}
}
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