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-rw-r--r--tmk_core/common.mk17
-rw-r--r--tmk_core/common/debounce.c22
-rw-r--r--tmk_core/common/debounce.h21
-rw-r--r--tmk_core/common/debounce/debounce_eager_pk.c124
-rw-r--r--tmk_core/common/debounce/debounce_sym_g.c59
-rw-r--r--tmk_core/common/debounce/readme.md28
-rw-r--r--tmk_core/common/keyboard.c22
7 files changed, 276 insertions, 17 deletions
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index 3e407f1573..72b2d3cc86 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -1,4 +1,5 @@
COMMON_DIR = common
+DEBOUNCE = $(COMMON_DIR)/debounce
ifeq ($(PLATFORM),AVR)
PLATFORM_COMMON_DIR = $(COMMON_DIR)/avr
else ifeq ($(PLATFORM),CHIBIOS)
@@ -9,6 +10,7 @@ endif
TMK_COMMON_SRC += $(COMMON_DIR)/host.c \
$(COMMON_DIR)/keyboard.c \
+ $(COMMON_DIR)/debounce.c \
$(COMMON_DIR)/action.c \
$(COMMON_DIR)/action_tapping.c \
$(COMMON_DIR)/action_macro.c \
@@ -39,7 +41,20 @@ ifeq ($(PLATFORM),TEST)
TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
endif
-
+# Debounce Modules. If implemented in matrix.c, don't use these.
+ifeq ($(strip $(CUSTOM_MATRIX)), yes)
+ # Do nothing. Custom matrix code.
+else ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
+ # Do nothing, debouncing is inside matrix.c inside split_common
+else ifeq ($(strip $(DEBOUNCE_ALGO)), manual)
+ # Do nothing. do your debouncing in matrix.c
+else ifeq ($(strip $(DEBOUNCE_ALGO)), sym_g)
+ TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
+else ifeq ($(strip $(DEBOUNCE_ALGO)), eager_pk)
+ TMK_COMMON_SRC += $(DEBOUNCE)/debounce_eager_pk.c
+else # default algorithm
+ TMK_COMMON_SRC += $(DEBOUNCE)/debounce_sym_g.c
+endif
# Option modules
ifeq ($(strip $(BOOTMAGIC_ENABLE)), yes)
diff --git a/tmk_core/common/debounce.c b/tmk_core/common/debounce.c
new file mode 100644
index 0000000000..406d2d0f38
--- /dev/null
+++ b/tmk_core/common/debounce.c
@@ -0,0 +1,22 @@
+/*
+Copyright 2017 Alex Ong<the.onga@gmail.com>
+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 <http://www.gnu.org/licenses/>.
+*/
+#include "debounce.h"
+#include "matrix.h"
+//Default implementation - no debouncing
+__attribute__((weak)) void matrix_debounce_init(void) {}
+__attribute__((weak)) void matrix_debounce(void) {}
+__attribute__((weak)) matrix_row_t matrix_debounce_get_row(uint8_t row)
+{
+ return matrix_get_row(row);
+}
diff --git a/tmk_core/common/debounce.h b/tmk_core/common/debounce.h
new file mode 100644
index 0000000000..fe3effab32
--- /dev/null
+++ b/tmk_core/common/debounce.h
@@ -0,0 +1,21 @@
+#ifndef DEBOUNCE_H
+#define DEBOUNCE_H
+#include <stdbool.h>
+#include <stdint.h>
+#include "matrix.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+ /* called to initialize any data stores your implementation has*/
+ void matrix_debounce_init(void);
+ /* call this every keyboard_task to debounce the matrix*/
+ void matrix_debounce(void);
+ /* matrix state on row */
+ matrix_row_t matrix_debounce_get_row(uint8_t row);
+ /* whether a switch is on */
+ bool matrix_debounce_is_on(uint8_t row, uint8_t col);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/tmk_core/common/debounce/debounce_eager_pk.c b/tmk_core/common/debounce/debounce_eager_pk.c
new file mode 100644
index 0000000000..984da0570a
--- /dev/null
+++ b/tmk_core/common/debounce/debounce_eager_pk.c
@@ -0,0 +1,124 @@
+/*
+Copyright 2017 Alex Ong<the.onga@gmail.com>
+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 <http://www.gnu.org/licenses/>.
+*/
+
+/*
+Basic per-key algorithm. Uses an 8-bit counter per key.
+After pressing a key, it immediately changes state, and sets a counter.
+No further inputs are accepted until DEBOUNCE milliseconds have occurred.
+*/
+
+#include "debounce.h"
+#include "matrix.h"
+#include "timer.h"
+
+#ifndef DEBOUNCE
+ #define DEBOUNCE 5
+#endif
+
+
+#if (MATRIX_COLS <= 8)
+# define ROW_SHIFTER ((uint8_t)1)
+#elif (MATRIX_COLS <= 16)
+# define ROW_SHIFTER ((uint16_t)1)
+#elif (MATRIX_COLS <= 32)
+# define ROW_SHIFTER ((uint32_t)1)
+#endif
+
+
+
+#define debounce_counter_t uint8_t
+
+static matrix_row_t matrix_debounced[MATRIX_ROWS];
+static debounce_counter_t debounce_counters[MATRIX_ROWS*MATRIX_COLS];
+
+#define DEBOUNCE_ELAPSED 251
+#define MAX_DEBOUNCE (DEBOUNCE_ELAPSED - 1)
+
+void update_debounce_counters(uint8_t current_time);
+void transfer_matrix_values(uint8_t current_time);
+
+void matrix_debounce_init(void)
+{
+ for (uint8_t r = 0; r < MATRIX_ROWS; r++)
+ {
+ matrix_debounced[r] = 0;
+ }
+
+ int i = 0;
+ for (uint8_t r = 0; r < MATRIX_ROWS; r++)
+ {
+ for (uint8_t c = 0; c < MATRIX_COLS; c++)
+ {
+ debounce_counters[i++] = DEBOUNCE_ELAPSED;
+ }
+ }
+}
+
+void matrix_debounce(void)
+{
+ uint8_t current_time = timer_read() % MAX_DEBOUNCE;
+ update_debounce_counters(current_time);
+ transfer_matrix_values(current_time);
+}
+
+//If the current time is > debounce counter, set the counter to enable input.
+void update_debounce_counters(uint8_t current_time)
+{
+ debounce_counter_t *debounce_pointer = debounce_counters;
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++)
+ {
+ for (uint8_t col = 0; col < MATRIX_COLS; col++)
+ {
+ if (*debounce_pointer != DEBOUNCE_ELAPSED)
+ {
+ if (TIMER_DIFF(current_time, *debounce_pointer, MAX_DEBOUNCE) >=
+ DEBOUNCING_DELAY) {
+ *debounce_pointer = DEBOUNCE_ELAPSED;
+ }
+ }
+ debounce_pointer++;
+ }
+ }
+}
+
+// upload from raw_matrix to final matrix;
+void transfer_matrix_values(uint8_t current_time)
+{
+ debounce_counter_t *debounce_pointer = debounce_counters;
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++)
+ {
+ matrix_row_t existing_row = matrix_debounced[row];
+ matrix_row_t raw_row = matrix_get_row(row);
+
+ for (uint8_t col = 0; col < MATRIX_COLS; col++)
+ {
+ matrix_row_t col_mask = (ROW_SHIFTER << col);
+ bool final_value = raw_row & col_mask;
+ bool existing_value = existing_row & col_mask;
+ if (*debounce_pointer == DEBOUNCE_ELAPSED &&
+ (existing_value != final_value))
+ {
+ *debounce_pointer = current_time;
+ existing_row ^= col_mask; //flip the bit.
+ }
+ debounce_pointer++;
+ }
+ matrix_debounced[row] = existing_row;
+ }
+}
+
+matrix_row_t matrix_debounce_get_row(uint8_t row)
+{
+ return matrix_debounced[row];
+}
diff --git a/tmk_core/common/debounce/debounce_sym_g.c b/tmk_core/common/debounce/debounce_sym_g.c
new file mode 100644
index 0000000000..2fb7a589d7
--- /dev/null
+++ b/tmk_core/common/debounce/debounce_sym_g.c
@@ -0,0 +1,59 @@
+/*
+Copyright 2017 Alex Ong<the.onga@gmail.com>
+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 <http://www.gnu.org/licenses/>.
+*/
+
+/*
+Basic global debounce algorithm. Used in 99% of keyboards at time of implementation
+When no state changes have occured for DEBOUNCE milliseconds, we push the state.
+*/
+#include "debounce.h"
+#include "matrix.h"
+#include "timer.h"
+#ifndef DEBOUNCE
+ #define DEBOUNCE 5
+#endif
+static matrix_row_t matrix_debounced[MATRIX_ROWS];
+static bool debouncing = false;
+static uint16_t debouncing_time;
+
+void matrix_debounce_init(void)
+{
+ for (uint8_t r = 0; r < MATRIX_ROWS; r++)
+ {
+ matrix_debounced[r] = 0;
+ }
+}
+
+void matrix_debounce(void)
+{
+ for (uint8_t r = 0; r < MATRIX_ROWS; r++)
+ {
+ matrix_row_t raw = matrix_get_row(r);
+ if (raw != matrix_debounced[r])
+ {
+ debouncing = true;
+ debouncing_time = timer_read();
+ }
+ }
+ if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
+ for (int i = 0; i < MATRIX_ROWS; i++) {
+ matrix_debounced[i] = matrix_get_row(i);
+ }
+ debouncing = false;
+ }
+}
+
+matrix_row_t matrix_debounce_get_row(uint8_t row)
+{
+ return matrix_debounced[row];
+}
diff --git a/tmk_core/common/debounce/readme.md b/tmk_core/common/debounce/readme.md
new file mode 100644
index 0000000000..1a77d44df5
--- /dev/null
+++ b/tmk_core/common/debounce/readme.md
@@ -0,0 +1,28 @@
+Debounce algorithms belong in this folder.
+Here are a few ideas
+
+1) Global vs Per-Key vs Per-Row
+ * Global - one timer for all keys. Any key change state affects global timer
+ * Per key - one timer per key
+ * Per row - one timer per row
+
+2) Eager vs symmetric vs assymetric
+ * Eager - any key change is reported immediately. All further inputs for DEBOUNCE ms are ignored.
+ * Symmetric - wait for no changes for DEBOUNCE ms before reporting change
+ * Assymetric - wait for different times depending on key-down/key-up. E.g. Eager key-down, DEBOUNCE ms key up.
+
+3) Timestamp vs cycles
+ * old old old code waits n cycles, decreasing count by one each matrix_scan
+ * newer code stores the millisecond the change occurred, and does subraction to figure out time elapsed.
+ * Timestamps are superior, i don't think cycles will ever be used again once upgraded.
+
+The default algorithm is symmetric and global.
+Here are a few that could be implemented:
+
+debounce_sym_g.c
+debounce_sym_pk.c
+debounce_sym_pr.c
+debounce_sym_pr_cycles.c //currently used in ergo-dox
+debounce_eager_g.c
+debounce_eager_pk.c
+debounce_eager_pr.c //could be used in ergo-dox!
diff --git a/tmk_core/common/keyboard.c b/tmk_core/common/keyboard.c
index 13b3cb4c0c..fe626efb35 100644
--- a/tmk_core/common/keyboard.c
+++ b/tmk_core/common/keyboard.c
@@ -18,6 +18,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <stdint.h>
#include "keyboard.h"
#include "matrix.h"
+#include "debounce.h"
#include "keymap.h"
#include "host.h"
#include "led.h"
@@ -157,6 +158,7 @@ void keyboard_init(void) {
MCUCR |= _BV(JTD);
#endif
matrix_init();
+ matrix_debounce_init();
#ifdef PS2_MOUSE_ENABLE
ps2_mouse_init();
#endif
@@ -206,9 +208,6 @@ void keyboard_init(void) {
void keyboard_task(void)
{
static matrix_row_t matrix_prev[MATRIX_ROWS];
-#ifdef MATRIX_HAS_GHOST
- // static matrix_row_t matrix_ghost[MATRIX_ROWS];
-#endif
static uint8_t led_status = 0;
matrix_row_t matrix_row = 0;
matrix_row_t matrix_change = 0;
@@ -217,24 +216,15 @@ void keyboard_task(void)
#endif
matrix_scan();
+ matrix_debounce();
+
if (is_keyboard_master()) {
for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
- matrix_row = matrix_get_row(r);
+ matrix_row = matrix_debounce_get_row(r);
matrix_change = matrix_row ^ matrix_prev[r];
if (matrix_change) {
#ifdef MATRIX_HAS_GHOST
- if (has_ghost_in_row(r, matrix_row)) {
- /* Keep track of whether ghosted status has changed for
- * debugging. But don't update matrix_prev until un-ghosted, or
- * the last key would be lost.
- */
- //if (debug_matrix && matrix_ghost[r] != matrix_row) {
- // matrix_print();
- //}
- //matrix_ghost[r] = matrix_row;
- continue;
- }
- //matrix_ghost[r] = matrix_row;
+ if (has_ghost_in_row(r, matrix_row)) continue;
#endif
if (debug_matrix) matrix_print();
for (uint8_t c = 0; c < MATRIX_COLS; c++) {