reset timer properly for more accurate timing

timer.c

@@ -103,8 +103,12 @@ void setTimer(uint32_t delay)
 	// we also then calculate the timer ceiling required. (ie what the counter counts to)
 	// the result is the timer counts up to the appropriate time and then fires an interrupt.
 
-	setTimerCeiling(getTimerCeiling(delay));
-	setTimerResolution(getTimerResolution(delay));
+	setTimerResolution(0);													// stop timer
+	TCNT1 = 0;																			// reset timer
+	GTCCR = MASK(PSRSYNC);													// reset prescaler - affects timer 0 too but since it's doing PWM, it's not using the prescaler
+
+	setTimerCeiling(getTimerCeiling(delay));				// set timeout
+	setTimerResolution(getTimerResolution(delay));	// restart timer with proper prescaler
 }
 
 // delay( microseconds )