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- /*
- Copyright 2012 Jun Wako <[email protected]>
-
- 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;
- }
-
- /* generic STM32F103C8T6 board */
- #ifdef BOARD_GENERIC_STM32_F103
- #define LED_ON() do { palClearPad(GPIOC, GPIOC_LED) ;} while (0)
- #define LED_OFF() do { palSetPad(GPIOC, GPIOC_LED); } while (0)
- #define LED_TGL() do { palTogglePad(GPIOC, GPIOC_LED); } while (0)
- #endif
-
- /* Maple Mini */
- #ifdef BOARD_MAPLEMINI_STM32_F103
- #define LED_ON() do { palSetPad(GPIOB, 1) ;} while (0)
- #define LED_OFF() do { palClearPad(GPIOB, 1); } while (0)
- #define LED_TGL() do { palTogglePad(GPIOB, 1); } while (0)
- #endif
-
- 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)
- {
- #ifdef BOARD_MAPLEMINI_STM32_F103
- // don't need pullup/down, since it's pulled down in hardware
- palSetPadMode(GPIOB, 8, PAL_MODE_INPUT);
- #else
- palSetPadMode(GPIOB, 8, PAL_MODE_INPUT_PULLDOWN);
- #endif
- }
-
- /* Returns status of switches(1:on, 0:off) */
- static matrix_row_t read_cols(void)
- {
- return ((palReadPad(GPIOB, 8)==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;
- // }
- }
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