-// matrix state buffer(1:on, 0:off)
-static uint8_t *matrix;
-static uint8_t *matrix_debouncing;
-static uint8_t matrix0[MATRIX_ROWS];
-static uint8_t matrix1[MATRIX_ROWS];
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];