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#include "keymat.h"
#include "keymap.h"
#include "split.h"
#include "pico/types.h"
#include "hardware/gpio.h"
#include "hardware/timer.h"
#include <string.h>
static const uint keymat_row_pins[] = { 4, 5, 6, 7 };
static const uint keymat_col_pins[] = { 29, 28, 27, 26, 22, 20 };
static_assert(ARRLEN(keymat_row_pins) == KEY_ROWS_HALF);
static_assert(ARRLEN(keymat_col_pins) == KEY_COLS);
bool keymat_prev[KEY_ROWS][KEY_COLS];
bool keymat[KEY_ROWS][KEY_COLS];
void
keymat_init(void)
{
uint x, y;
for (x = 0; x < KEY_COLS; x++) {
gpio_init(keymat_col_pins[x]);
gpio_set_dir(keymat_col_pins[x], GPIO_IN);
gpio_pull_up(keymat_col_pins[x]);
}
for (y = 0; y < KEY_ROWS_HALF; y++) {
gpio_init(keymat_row_pins[y]);
gpio_set_dir(keymat_row_pins[y], GPIO_OUT);
}
}
void
keymat_next(void)
{
memcpy(keymat_prev, keymat, sizeof(keymat));
}
void
keymat_scan(void)
{
bool (*keymat_half)[KEY_COLS];
uint x, y;
keymat_half = KEYMAT_HALF(SPLIT_SIDE);
for (y = 0; y < KEY_ROWS_HALF; y++) {
gpio_put(keymat_row_pins[y], 0);
busy_wait_us(5);
for (x = 0; x < KEY_COLS; x++)
keymat_half[y][x] = !gpio_get(keymat_col_pins[x]);
gpio_put(keymat_row_pins[y], 1);
busy_wait_us(5);
}
}
uint32_t
keymat_encode_half(int side)
{
bool (*keymat_half)[KEY_COLS];
uint32_t mask;
uint x, y;
mask = 0;
keymat_half = KEYMAT_HALF(side);
for (y = 0; y < KEY_ROWS_HALF; y++) {
for (x = 0; x < KEY_COLS; x++) {
if (keymat_half[y][x])
mask |= 1 << (y * KEY_COLS + x);
}
}
return mask;
}
void
keymat_decode_half(int side, uint32_t mask)
{
bool (*keymat_half)[KEY_COLS];
uint x, y;
keymat_half = KEYMAT_HALF(side);
for (y = 0; y < KEY_ROWS_HALF; y++) {
for (x = 0; x < KEY_COLS; x++) {
keymat_half[y][x] = (mask >> (y * KEY_COLS + x)) & 1;
}
}
}
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