diff --git a/keyboards/spiderisland/split78/config.h b/keyboards/spiderisland/split78/config.h
index a7ec160faf..e15e5d193d 100644
--- a/keyboards/spiderisland/split78/config.h
+++ b/keyboards/spiderisland/split78/config.h
@@ -33,3 +33,5 @@ along with this program. If not, see .
#define BACKLIGHT_PIN D4
#define BACKLIGHT_LEVELS 3
#define BACKLIGHT_BREATHING
+
+#define DEBOUNCE 50
diff --git a/keyboards/spiderisland/split78/matrix.c b/keyboards/spiderisland/split78/matrix.c
index b5c7028fdf..71e154e5b7 100644
--- a/keyboards/spiderisland/split78/matrix.c
+++ b/keyboards/spiderisland/split78/matrix.c
@@ -105,9 +105,17 @@ void matrix_init_custom(void) {
}
+static i2c_status_t mcp23018_status = I2C_STATUS_SUCCESS;
+
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
bool matrix_has_changed = false;
+#if defined(RIGHT_HALF)
+ if (mcp23018_status != I2C_STATUS_SUCCESS) {
+ mcp23018_status = mcp23018_init();
+ }
+#endif
+
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[row];
@@ -124,7 +132,9 @@ bool matrix_scan_custom(matrix_row_t current_matrix[]) {
// as 0x75 would be no keys pressed
uint8_t data = 0x7F;
// Receive the columns from right half
- i2c_receive(TWI_ADDR_WRITE, &data, 1, I2C_TIMEOUT);
+ if (mcp23018_status == I2C_STATUS_SUCCESS) {
+ mcp23018_status = i2c_receive(TWI_ADDR_WRITE, &data, 1, I2C_TIMEOUT);
+ }
#endif
cols |= ((~(PINA | 0x80)) & 0x7F);
@@ -146,7 +156,9 @@ void matrix_set_row_status(uint8_t row) {
//Set the remote row on port A
txdata[0] = (GPIOA);
txdata[1] = ( 0xFF & ~(1<|