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- #include <stdint.h>
- #include <stdbool.h>
- #include "gpio_api.h"
- #include "timer.h"
- #include "wait.h"
- #include "matrix.h"
-
-
- #ifndef DEBOUNCE
- #define DEBOUNCE 5
- #endif
-
- /*
- * Infinity Pinusage:
- * Column pins are input with internal pull-down. Row pins are output and strobe with high.
- * Key is high or 1 when it turns on.
- *
- * col: { PTD1, PTD2, PTD3, PTD4, PTD5, PTD6, PTD7 }
- * row: { PTB0, PTB1, PTB2, PTB3, PTB16, PTB17, PTC4, PTC5, PTD0 }
- */
- static gpio_t col[MATRIX_COLS];
- static gpio_t row[MATRIX_ROWS];
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
- static bool debouncing = false;
- static uint16_t debouncing_time = 0;
-
-
- void matrix_init(void)
- {
- /* Column(sense) */
- gpio_init_in_ex(&col[0], PTD1, PullDown);
- gpio_init_in_ex(&col[1], PTD2, PullDown);
- gpio_init_in_ex(&col[2], PTD3, PullDown);
- gpio_init_in_ex(&col[3], PTD4, PullDown);
- gpio_init_in_ex(&col[4], PTD5, PullDown);
- gpio_init_in_ex(&col[5], PTD6, PullDown);
- gpio_init_in_ex(&col[6], PTD7, PullDown);
-
- /* Row(strobe) */
- gpio_init_out_ex(&row[0], PTB0, 0);
- gpio_init_out_ex(&row[1], PTB1, 0);
- gpio_init_out_ex(&row[2], PTB2, 0);
- gpio_init_out_ex(&row[3], PTB3, 0);
- gpio_init_out_ex(&row[4], PTB16, 0);
- gpio_init_out_ex(&row[5], PTB17, 0);
- gpio_init_out_ex(&row[6], PTC4, 0);
- gpio_init_out_ex(&row[7], PTC5, 0);
- gpio_init_out_ex(&row[8], PTD0, 0);
- }
-
- uint8_t matrix_scan(void)
- {
- for (int i = 0; i < MATRIX_ROWS; i++) {
- matrix_row_t r = 0;
-
- gpio_write(&row[i], 1);
- wait_us(1); // need wait to settle pin state
- for (int j = 0; j < MATRIX_COLS; j++) {
- if (gpio_read(&col[j])) {
- r |= (1<<j);
- }
- }
- gpio_write(&row[i], 0);
-
- if (matrix_debouncing[i] != r) {
- matrix_debouncing[i] = r;
- debouncing = true;
- debouncing_time = timer_read();
- }
- }
-
- if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
- for (int i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- debouncing = false;
- }
- /*
- if (debouncing) {
- if (--debouncing) {
- return 0;
- } else {
- for (int i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
- }
- */
- return 1;
- }
-
- bool matrix_is_on(uint8_t row, uint8_t col)
- {
- return (matrix[row] & (1<<col));
- }
-
- matrix_row_t matrix_get_row(uint8_t row)
- {
- return matrix[row];
- }
-
- void matrix_print(void)
- {
- }
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