diff options
Diffstat (limited to 'keyboards/stm32_f072_onekey/matrix.c')
| -rw-r--r-- | keyboards/stm32_f072_onekey/matrix.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/keyboards/stm32_f072_onekey/matrix.c b/keyboards/stm32_f072_onekey/matrix.c new file mode 100644 index 0000000000..a05b38cd4c --- /dev/null +++ b/keyboards/stm32_f072_onekey/matrix.c @@ -0,0 +1,163 @@ +/* +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; + // } +} |