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Diffstat (limited to 'keyboards/handwired/xealous/debounce.c')
| -rw-r--r-- | keyboards/handwired/xealous/debounce.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/keyboards/handwired/xealous/debounce.c b/keyboards/handwired/xealous/debounce.c new file mode 100644 index 0000000000..65a99f27f2 --- /dev/null +++ b/keyboards/handwired/xealous/debounce.c @@ -0,0 +1,63 @@ +#include <string.h> +#include "config.h" +#include "matrix.h" +#include "timer.h" +#include "quantum.h" + +#ifndef DEBOUNCING_DELAY +# define DEBOUNCING_DELAY 5 +#endif + +//Debouncing counters +typedef uint8_t debounce_counter_t; +#define DEBOUNCE_COUNTER_MODULO 250 +#define DEBOUNCE_COUNTER_INACTIVE 251 + +static debounce_counter_t *debounce_counters; + +void debounce_init(uint8_t num_rows) +{ + debounce_counters = malloc(num_rows*MATRIX_COLS); + memset(debounce_counters, DEBOUNCE_COUNTER_INACTIVE, num_rows*MATRIX_COLS); +} + +void update_debounce_counters(uint8_t num_rows, uint8_t current_time) +{ + for (uint8_t row = 0; row < num_rows; row++) + { + for (uint8_t col = 0; col < MATRIX_COLS; col++) + { + if (debounce_counters[row*MATRIX_COLS + col] != DEBOUNCE_COUNTER_INACTIVE) + { + if (TIMER_DIFF(current_time, debounce_counters[row*MATRIX_COLS + col], DEBOUNCE_COUNTER_MODULO) >= DEBOUNCING_DELAY) { + debounce_counters[row*MATRIX_COLS + col] = DEBOUNCE_COUNTER_INACTIVE; + } + } + } + } +} + +void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time) +{ + for (uint8_t row = 0; row < num_rows; row++) + { + matrix_row_t delta = raw[row] ^ cooked[row]; + + for (uint8_t col = 0; col < MATRIX_COLS; col++) + { + if (debounce_counters[row*MATRIX_COLS + col] == DEBOUNCE_COUNTER_INACTIVE && (delta & (1<<col))) + { + debounce_counters[row*MATRIX_COLS + col] = current_time; + cooked[row] ^= (1 << col); + } + } + } +} + +void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) +{ + uint8_t current_time = timer_read() % DEBOUNCE_COUNTER_MODULO; + + update_debounce_counters(num_rows, current_time); + transfer_matrix_values(raw, cooked, num_rows, current_time); +}
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