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Diffstat (limited to 'keyboards/keychron/common/matrix.c')
| -rwxr-xr-x | keyboards/keychron/common/matrix.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/keyboards/keychron/common/matrix.c b/keyboards/keychron/common/matrix.c new file mode 100755 index 0000000000..8fe7588118 --- /dev/null +++ b/keyboards/keychron/common/matrix.c @@ -0,0 +1,218 @@ +/* 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 "quantum.h" + +#ifndef HC595_STCP +# define HC595_STCP B0 +#endif +#ifndef HC595_SHCP +# define HC595_SHCP A1 +#endif +#ifndef HC595_DS +# define HC595_DS A7 +#endif + +#ifndef HC595_START_INDEX +# define HC595_START_INDEX 0 +#endif +#ifndef HC595_END_INDEX +# define HC595_END_INDEX 15 +#endif +#ifndef HC595_OFFSET_INDEX +# define HC595_OFFSET_INDEX 0 +#endif + +#if defined(HC595_START_INDEX) && defined(HC595_END_INDEX) +# if ((HC595_END_INDEX - HC595_START_INDEX + 1) > 16) +# define SIZE_T uint32_t +# define UNSELECT_ALL_COL 0xFFFFFFFF +# define SELECT_ALL_COL 0x00000000 +# elif ((HC595_END_INDEX - HC595_START_INDEX + 1) > 8) +# define SIZE_T uint16_t +# define UNSELECT_ALL_COL 0xFFFF +# define SELECT_ALL_COL 0x0000 +# else +# define SIZE_T uint8_t +# define UNSELECT_ALL_COL 0xFF +# define SELECT_ALL_COL 0x00 +# endif +#endif + +pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS; +pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; + +static inline uint8_t readMatrixPin(pin_t pin) { + if (pin != NO_PIN) { + return readPin(pin); + } else { + return 1; + } +} + +static inline void setPinOutput_writeLow(pin_t pin) { + setPinOutput(pin); + writePinLow(pin); +} + +static inline void setPinOutput_writeHigh(pin_t pin) { + setPinOutput(pin); + writePinHigh(pin); +} + +static inline void HC595_delay(uint16_t n) { + while (n-- > 0) { + asm volatile("nop" ::: "memory"); + } +} + +static void HC595_output(SIZE_T data, bool bit_flag) { + uint8_t n = 1; + + ATOMIC_BLOCK_FORCEON { + for (uint8_t i = 0; i < (HC595_END_INDEX - HC595_START_INDEX + 1); i++) { + if (data & 0x1) { + writePinHigh(HC595_DS); + } else { + writePinLow(HC595_DS); + } + writePinHigh(HC595_SHCP); + HC595_delay(n); + writePinLow(HC595_SHCP); + HC595_delay(n); + if (bit_flag) { + break; + } else { + data = data >> 1; + } + } + writePinHigh(HC595_STCP); + HC595_delay(n); + writePinLow(HC595_STCP); + HC595_delay(n); + } +} + +static void select_col(uint8_t col) { + if (col < HC595_START_INDEX || col > HC595_END_INDEX) { + setPinOutput_writeLow(col_pins[col]); + } else { + if (col == HC595_START_INDEX) { + HC595_output(0x00, true); + if (col < HC595_OFFSET_INDEX) { + HC595_output(0x01, true); + } + } + } +} + +static void unselect_col(uint8_t col) { + if (col < HC595_START_INDEX || col > HC595_END_INDEX) { +#ifdef MATRIX_UNSELECT_DRIVE_HIGH + setPinOutput_writeHigh(col_pins[col]); +#else + setPinInputHigh(col_pins[col]); +#endif + } else { + HC595_output(0x01, true); + } +} + +static void unselect_cols(void) { + for (uint8_t col = 0; col < MATRIX_COLS; col++) { + if (col < HC595_START_INDEX || col > HC595_END_INDEX) { +#ifdef MATRIX_UNSELECT_DRIVE_HIGH + setPinOutput_writeHigh(col_pins[col]); +#else + setPinInputHigh(col_pins[col]); +#endif + } else { + if (col == HC595_START_INDEX) { + HC595_output(UNSELECT_ALL_COL, false); + } + break; + } + } +} + +void select_all_cols(void) { + for (uint8_t col = 0; col < MATRIX_COLS; col++) { + if (col < HC595_START_INDEX || col > HC595_END_INDEX) { + setPinOutput_writeLow(col_pins[col]); + } else { + if (col == HC595_START_INDEX) { + HC595_output(SELECT_ALL_COL, false); + } + break; + } + } +} + +static void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col, matrix_row_t row_shifter) { + // Select col + select_col(current_col); // select col + HC595_delay(200); + + // 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] |= row_shifter; + } else { + // Pin HI, clear col bit + current_matrix[row_index] &= ~row_shifter; + } + } + + // Unselect col + unselect_col(current_col); + HC595_delay(200); // wait for all Row signals to go HIGH +} + +void matrix_init_custom(void) { + setPinOutput(HC595_DS); + setPinOutput(HC595_STCP); + setPinOutput(HC595_SHCP); + + for (uint8_t x = 0; x < MATRIX_ROWS; x++) { + if (row_pins[x] != NO_PIN) { + setPinInputHigh(row_pins[x]); + } + } + + unselect_cols(); +} + +bool matrix_scan_custom(matrix_row_t current_matrix[]) { + matrix_row_t curr_matrix[MATRIX_ROWS] = {0}; + + // Set col, read rows + matrix_row_t row_shifter = MATRIX_ROW_SHIFTER; + for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++, row_shifter <<= 1) { + matrix_read_rows_on_col(curr_matrix, current_col, row_shifter); + } + + bool changed = memcmp(current_matrix, curr_matrix, sizeof(curr_matrix)) != 0; + if (changed) memcpy(current_matrix, curr_matrix, sizeof(curr_matrix)); + + return changed; +} + +void suspend_wakeup_init_kb(void) { + // code will run on keyboard wakeup + clear_keyboard(); +} |