From b829a1d2648abd0751e9d3505554547faf643425 Mon Sep 17 00:00:00 2001
From: Simon Arlott <70171+nomis@users.noreply.github.com>
Date: Wed, 9 Jun 2021 08:23:21 +0100
Subject: Avoid 8-bit timer overflows in debounce algorithms (#12240)
* Add fast_timer_t that is 16-bit or 32-bit based on architecture
A 16-bit timer will overflow sooner but be faster to compare on AVR.
* Avoid 8-bit timer overflows in debounce algorithms
Count down remaining elapsed time instead of trying to do 8-bit timer
comparisons.
Add a "none" implementation that is automatically used if DEBOUNCE is
0 otherwise it will break the _pk/_pr count down.
* Avoid unnecessary polling of the entire matrix in sym_eager_pk
The matrix only needs to be updated when a debounce timer expires.
* Avoid unnecessary polling of the entire matrix in sym_eager_pr
The matrix only needs to be updated when a debounce timer expires.
The use of the "needed_update" variable is trying to do what
"matrix_need_update" was added to fix but didn't work because it only
applied when all keys finished debouncing.
* Fix sym_defer_g timing inconsistency compared to other debounce algorithms
DEBOUNCE=5 should process the key after 5ms, not 6ms
* Add debounce tests
---
quantum/debounce/none.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 quantum/debounce/none.c
(limited to 'quantum/debounce/none.c')
diff --git a/quantum/debounce/none.c b/quantum/debounce/none.c
new file mode 100644
index 0000000000..b03892bc5b
--- /dev/null
+++ b/quantum/debounce/none.c
@@ -0,0 +1,31 @@
+/* Copyright 2021 Simon Arlott
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include "matrix.h"
+#include "quantum.h"
+#include
+
+void debounce_init(uint8_t num_rows) {}
+
+void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
+ for (int i = 0; i < num_rows; i++) {
+ cooked[i] = raw[i];
+ }
+}
+
+bool debounce_active(void) { return false; }
+
+void debounce_free(void) {}
--
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