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/*
* Copyright 2018-2023 Jack Humbert <jack.humb@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 "matrix.h"
#include <hal_pal.h>
#include <math.h>
#include "wait.h"
// STM32-specific watchdog config calculations
// timeout = 31.25us * PR * (RL + 1)
#define _STM32_IWDG_LSI(us) ((us) / 31.25)
#define STM32_IWDG_PR_US(us) (uint8_t)(log(_STM32_IWDG_LSI(us)) / log(2) - 11)
#define STM32_IWDG_PR_MS(s) STM32_IWDG_PR_US(s * 1000.0)
#define STM32_IWDG_PR_S(s) STM32_IWDG_PR_US(s * 1000000.0)
#define _STM32_IWDG_SCALAR(us) (2 << ((uint8_t)STM32_IWDG_PR_US(us) + 1))
#define STM32_IWDG_RL_US(us) (uint64_t)(_STM32_IWDG_LSI(us)) / _STM32_IWDG_SCALAR(us)
#define STM32_IWDG_RL_MS(s) STM32_IWDG_RL_US(s * 1000.0)
#define STM32_IWDG_RL_S(s) STM32_IWDG_RL_US(s * 1000000.0)
#if !defined(PLANCK_WATCHDOG_TIMEOUT)
# define PLANCK_WATCHDOG_TIMEOUT 1.0
#endif
/* matrix state(1:on, 0:off) */
static pin_t matrix_row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static pin_t matrix_col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
static matrix_row_t matrix_inverted[MATRIX_COLS];
void matrix_init_custom(void) {
// actual matrix setup - cols
for (int i = 0; i < MATRIX_COLS; i++) {
gpio_set_pin_output(matrix_col_pins[i]);
gpio_write_pin_low(matrix_col_pins[i]);
}
// rows
for (int i = 0; i < MATRIX_ROWS; i++) {
gpio_set_pin_input_low(matrix_row_pins[i]);
}
// encoder A & B setup
gpio_set_pin_input_low(B12);
gpio_set_pin_input_low(B13);
#ifndef PLANCK_WATCHDOG_DISABLE
wdgInit();
static WDGConfig wdgcfg;
wdgcfg.pr = STM32_IWDG_PR_S(PLANCK_WATCHDOG_TIMEOUT);
wdgcfg.rlr = STM32_IWDG_RL_S(PLANCK_WATCHDOG_TIMEOUT);
wdgcfg.winr = STM32_IWDG_WIN_DISABLED;
wdgStart(&WDGD1, &wdgcfg);
#endif
}
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
#ifndef PLANCK_WATCHDOG_DISABLE
// reset watchdog
wdgReset(&WDGD1);
#endif
bool changed = false;
// actual matrix
for (int col = 0; col < MATRIX_COLS; col++) {
matrix_row_t data = 0;
// strobe col
gpio_write_pin_high(matrix_col_pins[col]);
// need wait to settle pin state
wait_us(20);
// read row data
for (int row = 0; row < MATRIX_ROWS; row++) {
data |= (gpio_read_pin(matrix_row_pins[row]) << row);
}
// unstrobe col
gpio_write_pin_low(matrix_col_pins[col]);
if (matrix_inverted[col] != data) {
matrix_inverted[col] = data;
}
}
for (int row = 0; row < MATRIX_ROWS; row++) {
matrix_row_t old = current_matrix[row];
current_matrix[row] = 0;
for (int col = 0; col < MATRIX_COLS; col++) {
current_matrix[row] |= ((matrix_inverted[col] & (1 << row) ? 1 : 0) << col);
}
changed |= old != current_matrix[row];
}
return changed;
}
#if defined(ENCODER_ENABLE) || defined(ENCODER_MAP_ENABLE)
#if !defined(PLANCK_ENCODER_SETTLE_PIN_STATE_DELAY)
# define PLANCK_ENCODER_SETTLE_PIN_STATE_DELAY 10
#endif
void encoder_quadrature_init_pin(uint8_t index, bool pad_b) {
}
uint8_t encoder_quadrature_read_pin(uint8_t index, bool pad_b) {
pin_t col_pin = pad_b ? B13 : B12;
gpio_set_pin_output(col_pin);
gpio_write_pin_high(col_pin);
wait_us(PLANCK_ENCODER_SETTLE_PIN_STATE_DELAY);
uint8_t ret = gpio_read_pin(matrix_row_pins[index]) ? 0 : 1;
gpio_set_pin_input_low(col_pin);
return ret;
}
#endif // ENCODER_ENABLE || ENCODER_MAP_ENABLE
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