1 files changed, 125 insertions, 8 deletions

diff --git a/quantum/matrix.c b/quantum/matrix.c
index 566d9ff34..ed4643f81 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -21,15 +21,43 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "matrix.h"
 #include "debounce.h"
 #include "quantum.h"
+#ifdef SPLIT_KEYBOARD
+#    include "split_common/split_util.h"
+#    include "split_common/transactions.h"
+
+#    ifndef ERROR_DISCONNECT_COUNT
+#        define ERROR_DISCONNECT_COUNT 5
+#    endif  // ERROR_DISCONNECT_COUNT
+
+#    define ROWS_PER_HAND (MATRIX_ROWS / 2)
+#else
+#    define ROWS_PER_HAND (MATRIX_ROWS)
+#endif
+
+#ifdef DIRECT_PINS_RIGHT
+#    define SPLIT_MUTABLE
+#else
+#    define SPLIT_MUTABLE const
+#endif
+#ifdef MATRIX_ROW_PINS_RIGHT
+#    define SPLIT_MUTABLE_ROW
+#else
+#    define SPLIT_MUTABLE_ROW const
+#endif
+#ifdef MATRIX_COL_PINS_RIGHT
+#    define SPLIT_MUTABLE_COL
+#else
+#    define SPLIT_MUTABLE_COL const
+#endif
 
 #ifdef DIRECT_PINS
-static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
+static SPLIT_MUTABLE pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
 #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
 #    ifdef MATRIX_ROW_PINS
-static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+static SPLIT_MUTABLE_ROW pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
 #    endif  // MATRIX_ROW_PINS
 #    ifdef MATRIX_COL_PINS
-static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+static SPLIT_MUTABLE_COL pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 #    endif  // MATRIX_COL_PINS
 #endif
 
@@ -37,10 +65,19 @@ static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 extern matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
 extern matrix_row_t matrix[MATRIX_ROWS];      // debounced values
 
+#ifdef SPLIT_KEYBOARD
+// row offsets for each hand
+uint8_t thisHand, thatHand;
+#endif
+
 // user-defined overridable functions
 __attribute__((weak)) void matrix_init_pins(void);
 __attribute__((weak)) void matrix_read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
 __attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
+#ifdef SPLIT_KEYBOARD
+__attribute__((weak)) void matrix_slave_scan_kb(void) { matrix_slave_scan_user(); }
+__attribute__((weak)) void matrix_slave_scan_user(void) {}
+#endif
 
 static inline void setPinOutput_writeLow(pin_t pin) {
     ATOMIC_BLOCK_FORCEON {
@@ -192,7 +229,7 @@ __attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[]
     matrix_output_select_delay();
 
     // For each row...
-    for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
+    for (uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++) {
         // Check row pin state
         if (readMatrixPin(row_pins[row_index]) == 0) {
             // Pin LO, set col bit
@@ -217,6 +254,37 @@ __attribute__((weak)) void matrix_read_rows_on_col(matrix_row_t current_matrix[]
 #endif
 
 void matrix_init(void) {
+#ifdef SPLIT_KEYBOARD
+    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;
+#endif
+
     // initialize key pins
     matrix_init_pins();
 
@@ -226,17 +294,62 @@ void matrix_init(void) {
         matrix[i]     = 0;
     }
 
-    debounce_init(MATRIX_ROWS);
+    debounce_init(ROWS_PER_HAND);
 
     matrix_init_quantum();
+
+#ifdef SPLIT_KEYBOARD
+    split_post_init();
+#endif
 }
 
+#ifdef SPLIT_KEYBOARD
+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_kb();
+    }
+
+    return changed;
+}
+#endif
+
 uint8_t matrix_scan(void) {
     matrix_row_t curr_matrix[MATRIX_ROWS] = {0};
 
 #if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
     // Set row, read cols
-    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
         matrix_read_cols_on_row(curr_matrix, current_row);
     }
 #elif (DIODE_DIRECTION == ROW2COL)
@@ -249,8 +362,12 @@ uint8_t matrix_scan(void) {
     bool changed = memcmp(raw_matrix, curr_matrix, sizeof(curr_matrix)) != 0;
     if (changed) memcpy(raw_matrix, curr_matrix, sizeof(curr_matrix));
 
-    debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
-
+#ifdef SPLIT_KEYBOARD
+    debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed);
+    changed = (changed || matrix_post_scan());
+#else
+    debounce(raw_matrix, matrix, ROWS_PER_HAND, changed);
     matrix_scan_quantum();
+#endif
     return (uint8_t)changed;
 }