AVR-Chat

Hello,

I need to generate a pulse of some length and plan to use Timer 1 on a ATMega644p in normal mode (0).

So I set 

 TCCR1A = 0b10100000; //This sets PD5/4 do be OC1A/B, to be cleared on Compare-Match
//                ||||||||
//                ||||||--WGM11, WGM10 (00) Normal Mode. Also set WGM13:2 in TCCRnB to 00
//                ||||--   Reserved, must be 0
//                ||--    COM1B1, COM1B0: 10 = Clear OC1B on Compare Match. Set at Pulse Start
//                --       COM1A1, COM1A0: 10 = Clear OC1A on Compare Match. Set at Pulse Start

    PORTD |= _BV(PD4) | _BV(PD5);    //OC1B, OC1A as  outputs 

The plan is to set OC1A/B (PD5/4) High before I start the timer and have the timer clear them on Compare Match.

My problem is: How do I set OC1A/B to High, as they no longer "respond" to commands sent to Port D?
I tried:
PORTD |= _BV(PD4) | _BV(PD5); to no avail.

Any help appreciated, thanks.

Cat
 		 	   		  

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