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63 lines
1.8 KiB
63 lines
1.8 KiB
#include <string.h>
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#include "config.h"
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#include "matrix.h"
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#include "timer.h"
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#include "quantum.h"
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#ifndef DEBOUNCING_DELAY
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# define DEBOUNCING_DELAY 5
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#endif
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//Debouncing counters
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typedef uint8_t debounce_counter_t;
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#define DEBOUNCE_COUNTER_MODULO 250
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#define DEBOUNCE_COUNTER_INACTIVE 251
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static debounce_counter_t *debounce_counters;
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void debounce_init(uint8_t num_rows)
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{
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debounce_counters = malloc(num_rows*MATRIX_COLS);
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memset(debounce_counters, DEBOUNCE_COUNTER_INACTIVE, num_rows*MATRIX_COLS);
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}
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void update_debounce_counters(uint8_t num_rows, uint8_t current_time)
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{
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for (uint8_t row = 0; row < num_rows; row++)
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{
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for (uint8_t col = 0; col < MATRIX_COLS; col++)
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{
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if (debounce_counters[row*MATRIX_COLS + col] != DEBOUNCE_COUNTER_INACTIVE)
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{
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if (TIMER_DIFF(current_time, debounce_counters[row*MATRIX_COLS + col], DEBOUNCE_COUNTER_MODULO) >= DEBOUNCING_DELAY) {
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debounce_counters[row*MATRIX_COLS + col] = DEBOUNCE_COUNTER_INACTIVE;
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}
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}
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}
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}
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}
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void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time)
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{
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for (uint8_t row = 0; row < num_rows; row++)
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{
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matrix_row_t delta = raw[row] ^ cooked[row];
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for (uint8_t col = 0; col < MATRIX_COLS; col++)
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{
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if (debounce_counters[row*MATRIX_COLS + col] == DEBOUNCE_COUNTER_INACTIVE && (delta & (1<<col)))
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{
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debounce_counters[row*MATRIX_COLS + col] = current_time;
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cooked[row] ^= (1 << col);
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}
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}
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}
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}
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void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed)
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{
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uint8_t current_time = timer_read() % DEBOUNCE_COUNTER_MODULO;
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update_debounce_counters(num_rows, current_time);
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transfer_matrix_values(raw, cooked, num_rows, current_time);
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}
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