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alps64: Fix for delay time for matrix scan

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Delay less than 20us can cause false key detection in some situations.
With week internal pull-up takes time to charge stray capacitance of
trace between ground fill(and fingers), perhaps?

In particular, when testing Alps64 PCB without diodes tweezer is used
to close a key and this makes trace longer, more capacitance in result.
This commit is contained in:
tmk 2019-12-28 22:39:54 +09:00
parent 45e45691e0
commit ba4f28a484
1 changed files with 1 additions and 1 deletions
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2
keyboard/alps64/matrix.c
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@ -72,7 +72,7 @@ uint8_t matrix_scan(void)
{ {
for (uint8_t i = 0; i < MATRIX_ROWS; i++) { for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
select_row(i); select_row(i);
_delay_us(1); // delay for settling _delay_us(30); // delay for settling
matrix_row_t cols = read_cols(); matrix_row_t cols = read_cols();
if (matrix_debouncing[i] != cols) { if (matrix_debouncing[i] != cols) {
if (debouncing) { if (debouncing) {