Fixed default maximum frequency calculation in Tone.cpp.

Claudio Indellicati · bitron · commit 5a6dafaf8cda · 2015-04-15T18:00:12.000+02:00
diff --git a/cores/arduino/Tone.cpp b/cores/arduino/Tone.cpp
@@ -21,7 +21,7 @@
 
 #define WAIT_TC16_REGS_SYNC(x) while(x->COUNT16.STATUS.bit.SYNCBUSY);
 
-uint32_t toneMaxFrequency = SystemCoreClock / 2;
+uint32_t toneMaxFrequency = F_CPU / 2;
 uint32_t lastOutputPin = 0xFFFFFFFF;
 
 volatile uint32_t *portToggleRegister;
