di0ib/tmk_keyboard_custom
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Improve debouncing algorithm

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This commit is contained in:
Kai Ryu 2014-08-11 17:55:04 +09:00
parent 8960e8c9da
commit 73ee96e91f
1 changed files with 11 additions and 29 deletions
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40
keyboard/tentapad/matrix.c
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@ -92,39 +92,21 @@ uint8_t matrix_scan(void)
{ {
matrix_row_t cols = read_cols(); matrix_row_t cols = read_cols();
for (uint8_t col = 0; col < MATRIX_COLS; col++) { for (uint8_t col = 0; col < MATRIX_COLS; col++) {
if ((cols & (1<<col)) != (matrix_debouncing & (1<<col))) { if (debouncing & (1<<col)) {
// state changed if (timer_elapsed(debouncing_last[col]) > DEBOUNCE) {
if (debouncing & (1<<col)) { debouncing &= ~(1<<col);
// debouncing if (!(cols & (1<<col))) {
if (timer_elapsed(debouncing_last[col]) > DEBOUNCE) {
// released
matrix &= ~(1<<col); matrix &= ~(1<<col);
debouncing &= ~(1<<col);
}
else {
// reset debounce time
debouncing_last[col] = timer_read();
}
}
else {
if (cols & (1<<col)) {
// pressed
matrix |= (1<<col);
}
else {
// start debounce
debouncing_last[col] = timer_read();
debouncing |= (1<<col);
} }
} }
} }
else { if ((cols & (1<<col)) != (matrix_debouncing & (1<<col))) {
if (debouncing & (1<<col)) { if (!(debouncing & (1<<col)) && (cols & (1<<col))) {
if (timer_elapsed(debouncing_last[col]) > DEBOUNCE) { matrix |= (1<<col);
// released }
matrix &= ~(1<<col); else {
debouncing &= ~(1<<col); debouncing_last[col] = timer_read();
} debouncing |= (1<<col);
} }
} }
} }