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diff --git a/keyboards/halfcliff/matrix.c b/keyboards/halfcliff/matrix.c
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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);
+}