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Diffstat (limited to 'keyboards/rgbkb/mun/matrix.c')
| -rw-r--r-- | keyboards/rgbkb/mun/matrix.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/keyboards/rgbkb/mun/matrix.c b/keyboards/rgbkb/mun/matrix.c new file mode 100644 index 0000000000..497ab041f4 --- /dev/null +++ b/keyboards/rgbkb/mun/matrix.c @@ -0,0 +1,156 @@ +/* + * ---------------------------------------------------------------------------- + * "THE BEER-WARE LICENSE" (Revision 42): + * <https://github.com/KarlK90> wrote this file. As long as you retain this + * notice you can do whatever you want with this stuff. If we meet some day, and + * you think this stuff is worth it, you can buy me a beer in return. KarlK90 + * ---------------------------------------------------------------------------- + */ + +#include <stdint.h> +#include <stdbool.h> +#include <string.h> +#include "util.h" +#include "matrix.h" +#include "debounce.h" +#include "quantum.h" +#include "split_util.h" +#include "config.h" +#include "transactions.h" + +#define ERROR_DISCONNECT_COUNT 5 +#define ROWS_PER_HAND (MATRIX_ROWS / 2) + +static const pin_t row_pins[ROWS_PER_HAND] = MATRIX_ROW_PINS; +static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; + +/* matrix state(1:on, 0:off) */ +extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values +extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values + +// row offsets for each hand +uint8_t thisHand, thatHand; + +// user-defined overridable functions +__attribute__((weak)) void matrix_slave_scan_kb(void) { matrix_slave_scan_user(); } +__attribute__((weak)) void matrix_slave_scan_user(void) {} + +static void init_pins(void) { + for (size_t i = 0; i < MATRIX_COLS; i++) { + setPinInputHigh(col_pins[i]); + } + for (size_t i = 0; i < ROWS_PER_HAND; i++) { + setPinOutput(row_pins[i]); + writePinHigh(row_pins[i]); + } +} + +void matrix_init(void) { + split_pre_init(); + + thisHand = isLeftHand ? 0 : (ROWS_PER_HAND); + thatHand = ROWS_PER_HAND - thisHand; + + // initialize key pins + init_pins(); + + // initialize matrix state: all keys off + memset(raw_matrix, 0, sizeof(raw_matrix)); + memset(matrix, 0, sizeof(matrix)); + + debounce_init(ROWS_PER_HAND); + + matrix_init_quantum(); + + split_post_init(); +} + +bool matrix_post_scan(void) { + bool changed = false; + if (is_keyboard_master()) { + static uint8_t error_count; + + matrix_row_t slave_matrix[ROWS_PER_HAND] = {0}; + if (!transport_master(matrix + thisHand, slave_matrix)) { + error_count++; + + if (error_count > ERROR_DISCONNECT_COUNT) { + // reset other half if disconnected + memset(&matrix[thatHand], 0, sizeof(slave_matrix)); + memset(slave_matrix, 0, sizeof(slave_matrix)); + + changed = true; + } + } else { + error_count = 0; + + if (memcmp(&matrix[thatHand], slave_matrix, sizeof(slave_matrix)) != 0) { + memcpy(&matrix[thatHand], slave_matrix, sizeof(slave_matrix)); + changed = true; + } + } + + matrix_scan_quantum(); + } else { + transport_slave(matrix + thatHand, matrix + thisHand); + + matrix_slave_scan_kb(); + } + + return changed; +} + +uint8_t matrix_scan(void) { + bool local_changed = false; + matrix_row_t current_matrix[ROWS_PER_HAND]; + + for (size_t row_idx = 0; row_idx < ROWS_PER_HAND; row_idx++) { + /* Drive row pin low. */ + ATOMIC_BLOCK_FORCEON { writePinLow(row_pins[row_idx]); } + matrix_output_select_delay(); + + /* Read all columns in one go, aka port scanning. */ + uint16_t porta = palReadPort(GPIOA); + uint16_t portb = palReadPort(GPIOB); + + /* Order of pins on the mun is: A0, B11, B0, B10, B12, B2, A8 + Pin is active low, therefore we have to invert the result. */ + matrix_row_t cols = ~(((porta & (0x1 << 0)) >> 0) // A0 (0) + | ((portb & (0x1 << 11)) >> 10) // B11 (1) + | ((portb & (0x1 << 0)) << 2) // B0 (2) + | ((portb & (0x1 << 10)) >> 7) // B10 (3) + | ((portb & (0x1 << 12)) >> 8) // B12 (4) + | ((portb & (0x1 << 2)) << 3) // B2 (5) + | ((porta & (0x1 << 8)) >> 2)); // A8 (6) + + /* Reverse the order of columns for left hand as the board is flipped. */ + // if (isLeftHand) { + // #if defined(__arm__) + // /* rbit assembly reverses bit order of 32bit registers. */ + // uint32_t temp = cols; + // __asm__("rbit %0, %1" : "=r"(temp) : "r"(temp)); + // cols = temp >> 24; + // #else + // /* RISC-V bit manipulation extension not present. Use bit-hack. + // https://graphics.stanford.edu/~seander/bithacks.html#ReverseByteWith32Bits */ + // cols = (matrix_row_t)(((cols * 0x0802LU & 0x22110LU) | (cols * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16); + // #endif + // } + + current_matrix[row_idx] = cols; + + /* Drive row pin high again. */ + ATOMIC_BLOCK_FORCEON { writePinHigh(row_pins[row_idx]); } + matrix_output_unselect_delay(row_idx, row_pins[row_idx] != 0); + } + + if (memcmp(raw_matrix, current_matrix, sizeof(current_matrix)) != 0) { + memcpy(raw_matrix, current_matrix, sizeof(current_matrix)); + local_changed = true; + } + + debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, local_changed); + + bool remote_changed = matrix_post_scan(); + return (uint8_t)(local_changed || remote_changed); +} |