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-rw-r--r--keyboards/stm32_f072_onekey/matrix.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/keyboards/stm32_f072_onekey/matrix.c b/keyboards/stm32_f072_onekey/matrix.c
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+/*
+Copyright 2012 Jun Wako <wakojun@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 "ch.h"
+#include "hal.h"
+
+/*
+ * scan matrix
+ */
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "wait.h"
+
+#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];
+
+static matrix_row_t read_cols(void);
+static void init_cols(void);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+#define LED_ON() do { palSetPad(GPIOC, GPIOC_LED_BLUE) ;} while (0)
+#define LED_OFF() do { palClearPad(GPIOC, GPIOC_LED_BLUE); } while (0)
+#define LED_TGL() do { palTogglePad(GPIOC, GPIOC_LED_BLUE); } while (0)
+
+void matrix_init(void)
+{
+ // initialize row and col
+ unselect_rows();
+ init_cols();
+
+ // initialize matrix state: all keys off
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ matrix[i] = 0;
+ matrix_debouncing[i] = 0;
+ }
+
+ //debug
+ debug_matrix = true;
+ LED_ON();
+ wait_ms(500);
+ LED_OFF();
+}
+
+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();
+ if (matrix_debouncing[i] != cols) {
+ matrix_debouncing[i] = cols;
+ if (debouncing) {
+ debug("bounce!: "); debug_hex(debouncing); debug("\n");
+ }
+ debouncing = DEBOUNCE;
+ }
+ unselect_rows();
+ }
+
+ if (debouncing) {
+ if (--debouncing) {
+ wait_ms(1);
+ } else {
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = matrix_debouncing[i];
+ }
+ }
+ }
+
+ return 1;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & ((matrix_row_t)1<<col));
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+ return matrix[row];
+}
+
+void matrix_print(void)
+{
+ print("\nr/c 0123456789ABCDEF\n");
+ for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+ phex(row); print(": ");
+ pbin_reverse16(matrix_get_row(row));
+ print("\n");
+ }
+}
+
+/* Column pin configuration
+ */
+static void init_cols(void)
+{
+ // don't need pullup/down, since it's pulled down in hardware
+ palSetPadMode(GPIOA, GPIOA_BUTTON, PAL_MODE_INPUT);
+}
+
+/* Returns status of switches(1:on, 0:off) */
+static matrix_row_t read_cols(void)
+{
+ return ((palReadPad(GPIOA, GPIOA_BUTTON)==PAL_LOW) ? 0 : (1<<0));
+ // | ((palReadPad(...)==PAL_HIGH) ? 0 : (1<<1))
+}
+
+/* Row pin configuration
+ */
+static void unselect_rows(void)
+{
+ // palSetPadMode(GPIOA, GPIOA_PIN10, PAL_MODE_INPUT); // hi-Z
+}
+
+static void select_row(uint8_t row)
+{
+ (void)row;
+ // Output low to select
+ // switch (row) {
+ // case 0:
+ // palSetPadMode(GPIOA, GPIOA_PIN10, PAL_MODE_OUTPUT_PUSHPULL);
+ // palSetPad(GPIOA, GPIOA_PIN10, PAL_LOW);
+ // break;
+ // }
+}