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