Adaptive debounce logic

The debounce filtering reports a key/switch change directly, without any extra delay. After that the debounce logic will filter all further changes, until the key/switch reports the same state for the given count of scans.
So a perfect switch will get a short debounce period and a bad key will get a much longer debounce period. The result is an adaptive debouncing period for each switch.

This value defines how often the same key/switch state has to be detected in successive reads until the next key state can be reported.
In other words this value defines the minimum debouncing period for a switch.

1 files changed, 10 insertions, 7 deletions

diff --git a/keyboards/ergodox_ez/config.h b/keyboards/ergodox_ez/config.h
index 7a350183b..ee768853a 100644
--- a/keyboards/ergodox_ez/config.h
+++ b/keyboards/ergodox_ez/config.h
@@ -85,17 +85,20 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define RGBW 1
 
-/* "debounce" is measured in keyboard scans. Some users reported
- * needing values as high as 15, which was at the time around 50ms.
+/*
+ * The debounce filtering reports a key/switch change directly,
+ * without any extra delay. After that the debounce logic will filter
+ * all further changes, until the key/switch reports the same state for
+ * the given count of scans.
+ * So a perfect switch will get a short debounce period and
+ * a bad key will get a much longer debounce period.
+ * The result is an adaptive debouncing period for each switch.
+ *
  * If you don't define it here, the matrix code will default to
  * 5, which is now closer to 10ms, but still plenty according to
  * manufacturer specs.
- *
- * Default is quite high, because of reports with some production
- * runs seeming to need it. This may change when configuration for
- * this is more directly exposed.
  */
-#define DEBOUNCE    15
+#define DEBOUNCE    10
 
 #define USB_MAX_POWER_CONSUMPTION 500