force the use of defined object TimerTcc0 to avoid problems with xiao mcu

src/uClock.cpp

@@ -39,10 +39,10 @@ IntervalTimer _uclockTimer;
 #if defined(SEEED_XIAO_M0)
 // 24 bits timer
 #include <TimerTCC0.h>
-#define _uclockTimer TimerTcc0
+// uses TimerTcc0
 // 16 bits timer
 //#include <TimerTC3.h>
-//#define _uclockTimer TimerTc3
+// uses TimerTc3
 #endif
 
 #if defined(ARDUINO_ARCH_AVR)
@@ -82,10 +82,10 @@ void uclockInitTimer()
 	#endif
 
 	#if defined(SEEED_XIAO_M0)
-		_uclockTimer.initialize(init_clock);
+		TimerTcc0.initialize(init_clock);
 
 		// attach to generic uclock ISR
-		_uclockTimer.attachInterrupt(uclockISR);
+		TimerTcc0.attachInterrupt(uclockISR);
 	#endif
 }
 #endif
@@ -211,7 +211,7 @@ void uClockClass::setTimerTempo(float bpm)
 	#endif
 
 	#if defined(SEEED_XIAO_M0)
-		_uclockTimer.setPeriod(tick_us_interval);
+		TimerTcc0.setPeriod(tick_us_interval);
 	#endif
 #endif
 }