matrix_row_t matrix_row = matrix_get_row(r);
for (uint8_t c = 0; c < MATRIX_COLS; c++) {
if (matrix_row & ((matrix_row_t)1<<c)) {
matrix_row_t matrix_row = matrix_get_row(r);
for (uint8_t c = 0; c < MATRIX_COLS; c++) {
if (matrix_row & ((matrix_row_t)1<<c)) {