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-rw-r--r--keyboards/ergodox/ez/matrix.c62
1 files changed, 37 insertions, 25 deletions
diff --git a/keyboards/ergodox/ez/matrix.c b/keyboards/ergodox/ez/matrix.c
index 43f5152591..21b60a542e 100644
--- a/keyboards/ergodox/ez/matrix.c
+++ b/keyboards/ergodox/ez/matrix.c
@@ -53,11 +53,14 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef DEBOUNCE
# define DEBOUNCE 5
#endif
-static uint8_t debouncing = DEBOUNCE;
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+// Debouncing: store for each key the number of scans until it's eligible to
+// change. When scanning the matrix, ignore any changes in keys that have
+// already changed in the last DEBOUNCE scans.
+static uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
static matrix_row_t read_cols(uint8_t row);
static void init_cols(void);
@@ -113,7 +116,9 @@ void matrix_init(void)
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
- matrix_debouncing[i] = 0;
+ for (uint8_t j=0; j < MATRIX_COLS; ++j) {
+ debounce_matrix[i * MATRIX_COLS + j] = 0;
+ }
}
#ifdef DEBUG_MATRIX_SCAN_RATE
@@ -134,14 +139,36 @@ void matrix_power_up(void) {
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
matrix[i] = 0;
- matrix_debouncing[i] = 0;
}
#ifdef DEBUG_MATRIX_SCAN_RATE
matrix_timer = timer_read32();
matrix_scan_count = 0;
#endif
+}
+
+// Returns a matrix_row_t whose bits are set if the corresponding key should be
+// eligible to change in this scan.
+matrix_row_t debounce_mask(uint8_t row) {
+ matrix_row_t result = 0;
+ for (uint8_t j=0; j < MATRIX_COLS; ++j) {
+ if (debounce_matrix[row * MATRIX_COLS + j]) {
+ --debounce_matrix[row * MATRIX_COLS + j];
+ } else {
+ result |= (1 << j);
+ }
+ }
+ return result;
+}
+// Report changed keys in the given row. Resets the debounce countdowns
+// corresponding to each set bit in 'change' to DEBOUNCE.
+void debounce_report(matrix_row_t change, uint8_t row) {
+ for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
+ if (change & (1 << i)) {
+ debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
+ }
+ }
}
uint8_t matrix_scan(void)
@@ -178,26 +205,12 @@ uint8_t matrix_scan(void)
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
select_row(i);
wait_us(30); // without this wait read unstable value.
- matrix_row_t cols = read_cols(i);
- if (matrix_debouncing[i] != cols) {
- matrix_debouncing[i] = cols;
- if (debouncing) {
- debug("bounce!: "); debug_hex(debouncing); debug("\n");
- }
- debouncing = DEBOUNCE;
- }
- unselect_rows();
- }
+ matrix_row_t mask = debounce_mask(i);
+ matrix_row_t cols = (read_cols(i) & mask) | (matrix[i] & ~mask);
+ debounce_report(cols ^ matrix[i], i);
+ matrix[i] = cols;
- if (debouncing) {
- if (--debouncing) {
- wait_us(1);
- // this should be wait_ms(1) but has been left as-is at EZ's request
- } else {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
+ unselect_rows();
}
matrix_scan_quantum();
@@ -205,9 +218,8 @@ uint8_t matrix_scan(void)
return 1;
}
-bool matrix_is_modified(void)
+bool matrix_is_modified(void) // deprecated and evidently not called.
{
- if (debouncing) return false;
return true;
}