AVR Freaks

Hello,

I did not find the way to report the bug, try to confirm here.

I created a breathing LED lighting program by TCD & RTC together.

I found 2 issues not reasonable.

1) Must define the CMPBCLR even if I just used the CMPA;

    In ONE RAMP mode, to set CMPASET & CMPACLR is enough if just using CMPA.

    But, refer to the code below,it will not work without "TCD0.CMPBCLR = tcd_CMPBCLR; " for "ebmRed" mode.

void ledBreathingBegin(EbreathMode bm){
	breathMode = bm;
	
    ledBreathingStop();
	
    if(breathMode==ebmBlue || breathMode == ebmBlueAndRed){
	    cmpbsetInc = false;
	    cmpbset = 0;
		TCD0.CMPBSET = cmpValue[cmpbset];
		TCD0.CMPBCLR = tcd_CMPBCLR;
	}
	
    if(breathMode==ebmRed || breathMode == ebmBlueAndRed){
	    cmpasetInc = false;
	    cmpaset = 0;
		TCD0.CMPBCLR = tcd_CMPBCLR;       //???ebmRed will not work without this sentence,why???
		TCD0.CMPASET = cmpValue[cmpaset];
		TCD0.CMPACLR = tcd_CMPBCLR;
    }

	while ((TCD0.STATUS & TCD_CMDRDY_bm) == 0);
	TCD0.CTRLE |= TCD_SYNC_bm; //sync register values 

	TCD_begin(); 
	RTC_INT_ENABLE; 
}

2) Can't stop output to pin even if you disable the TCD.

I have to set the CMPxSET to CMPxCLR to stop output before disable TCD.

void ledBreathingStop(void){
	RTC_INT_DISABLE;
	
	TCD0.CMPBSET = tcd_CMPBCLR; //try to switch off led, can't switch off by OUTCLR command
	TCD0.CMPASET = tcd_CMPBCLR;
	while ((TCD0.STATUS & TCD_CMDRDY_bm) == 0);
	TCD0.CTRLE |= TCD_SYNC_bm; //must send CMD through CTRLE register,otherwise TCD don't sync
	
	TCD_stop();
}

I think it is some kind of bug.