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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 "gpio.h"
- #include "hal_pal.h"
- #include "hal_pal_lld.h"
- #include "quantum.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)
-
- /* 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];
-
- int8_t encoder_LUT[] = {0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0};
- uint8_t encoder_state[8] = {0};
- int8_t encoder_pulses[8] = {0};
- uint8_t encoder_value[8] = {0};
-
- void matrix_init_custom(void) {
- // actual matrix setup - cols
- for (int i = 0; i < MATRIX_COLS; i++) {
- setPinOutput(matrix_col_pins[i]);
- }
-
- // rows
- for (int i = 0; i < MATRIX_ROWS; i++) {
- setPinInputLow(matrix_row_pins[i]);
- }
-
- // encoder A & B setup
- setPinInputLow(B12);
- setPinInputLow(B13);
-
- // setup watchdog timer for 1 second
- wdgInit();
-
- static WDGConfig wdgcfg;
- wdgcfg.pr = STM32_IWDG_PR_S(1.0);
- wdgcfg.rlr = STM32_IWDG_RL_S(1.0);
- wdgcfg.winr = STM32_IWDG_WIN_DISABLED;
- wdgStart(&WDGD1, &wdgcfg);
- }
-
- bool encoder_update(uint8_t index, uint8_t state) {
- bool changed = false;
- uint8_t i = index;
-
- encoder_pulses[i] += encoder_LUT[state & 0xF];
-
- if (encoder_pulses[i] >= ENCODER_RESOLUTION) {
- encoder_value[index]++;
- changed = true;
- #ifdef ENCODER_MAP_ENABLE
- encoder_exec_mapping(index, false);
- #else // ENCODER_MAP_ENABLE
- encoder_update_kb(index, false);
- #endif // ENCODER_MAP_ENABLE
- }
- if (encoder_pulses[i] <= -ENCODER_RESOLUTION) {
- encoder_value[index]--;
- changed = true;
- #ifdef ENCODER_MAP_ENABLE
- encoder_exec_mapping(index, true);
- #else // ENCODER_MAP_ENABLE
- encoder_update_kb(index, true);
- #endif // ENCODER_MAP_ENABLE
- }
- encoder_pulses[i] %= ENCODER_RESOLUTION;
- #ifdef ENCODER_DEFAULT_POS
- encoder_pulses[i] = 0;
- #endif
- return changed;
- }
-
- bool matrix_scan_custom(matrix_row_t current_matrix[]) {
- // reset watchdog
- wdgReset(&WDGD1);
-
- bool changed = false;
-
- // actual matrix
- for (int col = 0; col < MATRIX_COLS; col++) {
- matrix_row_t data = 0;
-
- // strobe col
- writePinHigh(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 |= (readPin(matrix_row_pins[row]) << row);
- }
-
- // unstrobe col
- writePinLow(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];
- }
-
- // encoder-matrix functionality
-
- // set up C/rows for encoder read
- for (int i = 0; i < MATRIX_ROWS; i++) {
- setPinOutput(matrix_row_pins[i]);
- writePinHigh(matrix_row_pins[i]);
- }
-
- // set up A & B for reading
- setPinInputHigh(B12);
- setPinInputHigh(B13);
-
- for (int i = 0; i < MATRIX_ROWS; i++) {
- writePinLow(matrix_row_pins[i]);
- wait_us(10);
- uint8_t new_status = (palReadPad(GPIOB, 12) << 0) | (palReadPad(GPIOB, 13) << 1);
- if ((encoder_state[i] & 0x3) != new_status) {
- encoder_state[i] <<= 2;
- encoder_state[i] |= new_status;
- encoder_update(i, encoder_state[i]);
- }
- writePinHigh(matrix_row_pins[i]);
- }
-
- // revert A & B to matrix state
- setPinInputLow(B12);
- setPinInputLow(B13);
-
- // revert C/rows to matrix state
- for (int i = 0; i < MATRIX_ROWS; i++) {
- setPinInputLow(matrix_row_pins[i]);
- }
-
- return changed;
- }
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