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- /*
- Copyright 2012 Jun Wako <wakojun@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 <stdint.h>
- #include <stdbool.h>
- #include "util.h"
- #include "matrix.h"
- #include "debounce.h"
- #include "quantum.h"
- #include "split_util.h"
- #include "config.h"
- #include "transport.h"
-
- #define ERROR_DISCONNECT_COUNT 5
-
- #define ROWS_PER_HAND (MATRIX_ROWS / 2)
-
- static pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
- static pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
- static 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_init_kb(void) { matrix_init_user(); }
-
- __attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
-
- __attribute__((weak)) void matrix_init_user(void) {}
-
- __attribute__((weak)) void matrix_scan_user(void) {}
-
- __attribute__((weak)) void matrix_slave_scan_user(void) {}
-
- matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
-
- void matrix_print(void) {}
-
- 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); }
- }
-
- // matrix code
- static void select_row(uint8_t row) { setPinOutput_writeLow(row_pins[row]); }
-
- static void unselect_row(uint8_t row) { setPinInputHigh_atomic(row_pins[row]); }
-
- static void unselect_rows(void) {
- for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
- setPinInputHigh_atomic(row_pins[x]);
- }
- }
-
- static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
- // Start with a clear matrix row
- matrix_row_t current_row_value = 0;
-
- // Select row
- select_row(current_row);
- wait_us(30);
-
- // For each col...
- for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
- // Select the col pin to read (active low)
- uint8_t pin_state = readPin(col_pins[col_index]);
-
- // Populate the matrix row with the state of the col pin
- current_row_value |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
- }
-
- // Unselect row
- unselect_row(current_row);
- if (current_row + 1 < MATRIX_ROWS) {
- wait_us(30); // wait for row signal to go HIGH
- }
-
- // If the row has changed, store the row and return the changed flag.
- if (current_matrix[current_row] != current_row_value) {
- current_matrix[current_row] = current_row_value;
- return true;
- }
- return false;
- }
-
- static void select_col(uint8_t col) { setPinOutput_writeLow(col_pins[col]); }
-
- static void unselect_col(uint8_t col) { setPinInputHigh_atomic(col_pins[col]); }
-
- static void unselect_cols(void) {
- for (uint8_t x = 0; x < MATRIX_COLS; x++) {
- setPinInputHigh_atomic(col_pins[x]);
- }
- }
-
- static void init_pins(void) {
- unselect_rows();
- for (uint8_t x = 0; x < MATRIX_COLS; x++) {
- setPinInputHigh_atomic(col_pins[x]);
- }
- unselect_cols();
- for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
- setPinInputHigh_atomic(row_pins[x]);
- }
- }
-
- static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
- bool matrix_changed = false;
-
- // Select col
- select_col(current_col);
- wait_us(30);
-
- // For each row...
- for (uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++) {
- // Store last value of row prior to reading
- matrix_row_t last_row_value = current_matrix[row_index];
- matrix_row_t current_row_value = last_row_value;
-
- // Check row pin state
- if (readPin(row_pins[row_index]) == 0) {
- // Pin LO, set col bit
- current_row_value |= (MATRIX_ROW_SHIFTER << current_col);
- } else {
- // Pin HI, clear col bit
- current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col);
- }
-
- // Determine if the matrix changed state
- if ((last_row_value != current_row_value)) {
- matrix_changed |= true;
- current_matrix[row_index] = current_row_value;
- }
- }
-
- // Unselect col
- unselect_col(current_col);
- if (current_col + 1 < MATRIX_COLS) {
- wait_us(30); // wait for col signal to go HIGH
- }
-
- return matrix_changed;
- }
-
- void matrix_init(void) {
- split_pre_init();
-
- // Set pinout for right half if pinout for that half is defined
- if (!isLeftHand) {
- #ifdef DIRECT_PINS_RIGHT
- const pin_t direct_pins_right[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS_RIGHT;
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- for (uint8_t j = 0; j < MATRIX_COLS; j++) {
- direct_pins[i][j] = direct_pins_right[i][j];
- }
- }
- #endif
- #ifdef MATRIX_ROW_PINS_RIGHT
- const pin_t row_pins_right[MATRIX_ROWS] = MATRIX_ROW_PINS_RIGHT;
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- row_pins[i] = row_pins_right[i];
- }
- #endif
- #ifdef MATRIX_COL_PINS_RIGHT
- const pin_t col_pins_right[MATRIX_COLS] = MATRIX_COL_PINS_RIGHT;
- for (uint8_t i = 0; i < MATRIX_COLS; i++) {
- col_pins[i] = col_pins_right[i];
- }
- #endif
- }
-
- thisHand = isLeftHand ? 0 : (ROWS_PER_HAND);
- thatHand = ROWS_PER_HAND - thisHand;
-
- // initialize key pins
- init_pins();
-
- // initialize matrix state: all keys off
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- raw_matrix[i] = 0;
- matrix[i] = 0;
- }
-
- 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
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- matrix[thatHand + i] = 0;
- slave_matrix[i] = 0;
- }
-
- changed = true;
- }
- } else {
- error_count = 0;
-
- for (int i = 0; i < ROWS_PER_HAND; ++i) {
- if (matrix[thatHand + i] != slave_matrix[i]) {
- matrix[thatHand + i] = slave_matrix[i];
- changed = true;
- }
- }
- }
-
- matrix_scan_quantum();
- } else {
- transport_slave(matrix + thatHand, matrix + thisHand);
-
- matrix_slave_scan_user();
- }
-
- return changed;
- }
-
- uint8_t matrix_scan(void) {
- bool local_changed = false;
- static matrix_row_t temp_raw_matrix[MATRIX_ROWS]; // temp raw values
-
- // Set row, read cols
- for (uint8_t current_row = 0; current_row < ROWS_PER_HAND/2; current_row++) {
- local_changed |= read_cols_on_row(raw_matrix, current_row);
- }
-
- // Set col, read rows
- for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
- local_changed |= read_rows_on_col(temp_raw_matrix, current_col);
- //Updated key matrix on lines 6-10 (or lines 16-20)
- if(local_changed) {
- for (uint8_t i = ROWS_PER_HAND/2; i < ROWS_PER_HAND; i++) {
- raw_matrix[i] = temp_raw_matrix[i];
- }
- }
- }
-
- debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, local_changed);
-
- bool remote_changed = matrix_post_scan();
- return (uint8_t)(local_changed || remote_changed);
- }
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