Enable VREF on K66

fixes #145

teensy3/analog.c

@@ -134,7 +134,7 @@ void analog_init(void)
 {
 	uint32_t num;
 
-	#if defined(__MK20DX128__) || defined(__MK20DX256__)
+	#if defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
 	VREF_TRM = 0x60;
 	VREF_SC = 0xE1;		// enable 1.2 volt ref
 	#endif