diff options
Diffstat (limited to 'keyboards/keychron/k3_pro/matrix.c')
| -rw-r--r-- | keyboards/keychron/k3_pro/matrix.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/keyboards/keychron/k3_pro/matrix.c b/keyboards/keychron/k3_pro/matrix.c new file mode 100644 index 0000000000..072cfc3280 --- /dev/null +++ b/keyboards/keychron/k3_pro/matrix.c @@ -0,0 +1,197 @@ +/* Copyright 2023 @ Keychron (https://www.keychron.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 "stdint.h" +#include "hal.h" +#include "gpio.h" +#include "quantum.h" + +#define HC595_STCP B0 +#define HC595_SHCP A1 +#define HC595_DS A7 + +#define DIRECT_COL_NUM 1 + +pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS; +pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; + +static inline void HC595_delay(uint16_t n) { + while (n-- > 0) { + asm volatile("nop" ::: "memory"); + } +} + +#ifdef DRIVE_SHRIFT_REGISTER_WITH_SPI +// clang-format off +const SPIConfig hs_spicfg = { + .circular = false, + .slave = false, + .data_cb = NULL, + .error_cb = NULL, + .ssport = PAL_PORT(HC595_STCP), + .sspad = PAL_PAD(HC595_STCP), + .cr1 = SPI_CR1_BR_1, + .cr2 = SPI_CR2_DS_3 | SPI_CR2_DS_2 | SPI_CR2_DS_1 | SPI_CR2_DS_0 | SPI_CR2_SSOE | SPI_CR2_NSSP +}; +// clang-format on +#endif +static void HC595_output(uint16_t data) { +#ifdef DRIVE_SHRIFT_REGISTER_WITH_SPI + spiSend(&SPID1, 1, &data); +#else + uint8_t i; + uint8_t n = 1; + + for (i = 16; i > 0; i--) { + writePinLow(HC595_SHCP); + + if (data & 0x8000) + writePinHigh(HC595_DS); + else + writePinLow(HC595_DS); + + data <<= 1; + + HC595_delay(n); + + writePinHigh(HC595_SHCP); + HC595_delay(n); + } + + HC595_delay(n); + writePinLow(HC595_STCP); + HC595_delay(n); + writePinHigh(HC595_STCP); +#endif +} + +static inline void setPinOutput_writeLow(pin_t pin) { + ATOMIC_BLOCK_FORCEON { + setPinOutput(pin); + writePinLow(pin); + } +} + +static inline void setPinInputHigh_atomic(pin_t pin) { + ATOMIC_BLOCK_FORCEON { + setPinInputHigh(pin); + } +} + +static inline uint8_t readMatrixPin(pin_t pin) { + if (pin != NO_PIN) { + return readPin(pin); + } else { + return 1; + } +} + +static bool select_col(uint8_t col) { + pin_t pin = col_pins[col]; + + if (col < 1) { + if (pin != NO_PIN) { + setPinOutput_writeLow(pin); + return true; + } + } else { + HC595_output(~(0x01 << (col - 1))); + return true; + } + return false; +} + +static void unselect_col(uint8_t col) { + pin_t pin = col_pins[col]; + + if (col < 1) { + if (pin != NO_PIN) { + setPinInputHigh_atomic(pin); + } + } else { + if (col >= MATRIX_COLS - 1) HC595_output(0xFFFF); + } +} + +static void unselect_cols(void) { + if (col_pins[0] != NO_PIN) setPinInputHigh_atomic(col_pins[0]); + HC595_output(0xFFFF); +} + +void select_all_cols(void) { + if (col_pins[0] != NO_PIN) setPinOutput_writeLow(col_pins[0]); + HC595_output(0x0000); +} + +void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) { + // Select col + if (!select_col(current_col)) { // select col + return; // skip NO_PIN col + } + + HC595_delay(100); + + // For each row... + for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) { + // Check row pin state + if (readMatrixPin(row_pins[row_index]) == 0) { + // Pin LO, set col bit + current_matrix[row_index] |= (MATRIX_ROW_SHIFTER << current_col); + // key_pressed = true; + } else { + // Pin HI, clear col bit + current_matrix[row_index] &= ~(MATRIX_ROW_SHIFTER << current_col); + } + } + + unselect_col(current_col); + HC595_delay(100); +} + +void matrix_init_custom(void) { + for (uint8_t x = 0; x < MATRIX_ROWS; x++) { + if (row_pins[x] != NO_PIN) { + setPinInputHigh_atomic(row_pins[x]); + } + } +#ifdef DRIVE_SHRIFT_REGISTER_WITH_SPI + palSetPadMode(PAL_PORT(HC595_SHCP), PAL_PAD(HC595_SHCP), PAL_MODE_ALTERNATE(5) | PAL_STM32_OSPEED_HIGHEST); /* SCK */ + palSetPadMode(PAL_PORT(HC595_DS), PAL_PAD(HC595_DS), PAL_MODE_ALTERNATE(5) | PAL_STM32_OSPEED_HIGHEST); /* MOSI*/ + palSetPadMode(PAL_PORT(HC595_STCP), PAL_PAD(HC595_STCP), PAL_MODE_ALTERNATE(5) | PAL_STM32_OSPEED_HIGHEST); /* CS*/ + spiStart(&SPID1, &hs_spicfg); +#else + setPinOutput(HC595_DS); + setPinOutput(HC595_STCP); + setPinOutput(HC595_SHCP); +#endif + unselect_cols(); +} + +bool matrix_scan_custom(matrix_row_t current_matrix[]) { + bool matrix_has_changed = false; + + matrix_row_t curr_matrix[MATRIX_ROWS] = {0}; + + // Set col, read rows + for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) { + matrix_read_rows_on_col(curr_matrix, current_col); + } + + matrix_has_changed = memcmp(current_matrix, curr_matrix, sizeof(curr_matrix)) != 0; + if (matrix_has_changed) memcpy(current_matrix, curr_matrix, sizeof(curr_matrix)); + + return matrix_has_changed; +} |