+#ifdef DEBUG_MATRIX_FREQ
+ matrix_scan_count++;
+
+ uint32_t timer_now = timer_read32();
+ if (TIMER_DIFF_32(timer_now, matrix_timer)>1000) {
+ print("matrix scan frequency: ");
+ pdec(matrix_scan_count);
+ print("\n");
+
+ matrix_timer = timer_now;
+ matrix_scan_count = 0;
+ }
+#endif
+