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-rw-r--r--quantum/debounce/eager_pr.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/quantum/debounce/eager_pr.c b/quantum/debounce/eager_pr.c
index 173ad15ee9..d12931fddb 100644
--- a/quantum/debounce/eager_pr.c
+++ b/quantum/debounce/eager_pr.c
@@ -36,6 +36,16 @@ static bool counters_need_update;
#define DEBOUNCE_ELAPSED 251
#define MAX_DEBOUNCE (DEBOUNCE_ELAPSED - 1)
+static uint8_t wrapping_timer_read(void) {
+ static uint16_t time = 0;
+ static uint8_t last_result = 0;
+ uint16_t new_time = timer_read();
+ uint16_t diff = new_time - time;
+ time = new_time;
+ last_result = (last_result + diff) % (MAX_DEBOUNCE + 1);
+ return last_result;
+}
+
void update_debounce_counters(uint8_t num_rows, uint8_t current_time);
void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time);
@@ -48,7 +58,7 @@ void debounce_init(uint8_t num_rows) {
}
void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
- uint8_t current_time = timer_read() % MAX_DEBOUNCE;
+ uint8_t current_time = wrapping_timer_read();
bool needed_update = counters_need_update;
if (counters_need_update) {
update_debounce_counters(num_rows, current_time);