-uint8_t matrix_scan(void) {
- static matrix_row_t debouncing_matrix[MATRIX_ROWS];
- for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
- toggle_row(r);
- matrix_row_t state = read_cols();
- if (debouncing_matrix[r] != state) {
- debouncing_matrix[r] = state;
- debouncing_delay = DEBOUNCING_DELAY;
- }
- toggle_row(r);
- }
- if (debouncing_delay >= 0) {
- dprintf("Debouncing delay remaining: %X\n", debouncing_delay);
- --debouncing_delay;
- if (debouncing_delay >= 0) {
- wait_ms(1);
- }
- else {
- for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
- matrix[r] = debouncing_matrix[r];
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ select_row(i);
+ wait_us(30); // without this wait read unstable value.
+ matrix_row_t cols = read_cols();
+ if (matrix_debouncing[i] != cols) {
+ matrix_debouncing[i] = cols;
+ if (debouncing) {
+ debug("bounce!: "); debug_hex(debouncing); debug("\n");