>-----Original Message-----
>From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] 
>Sent: 05 January 2006 03:56
>To: Microcontroller discussion list - Public.
>Subject: Re: [PIC] CCP Compare Mode Question
>
>
>
>>> So, I can tell the CCP to set or clear a pin on a match. 
>Let's say I 
>>> tell it to set the pin on the match. How do I clear the pin?
>>
>> bcf LATx,CCP_Pin_No
>>
>> I take it you're wondering about creating a pulse of a precisely 
>> planned length without fiddle-farting around with a busy loop? Start 
>> Timer1, setup the CCP module to go high on match, put the 
>appropriate 
>> value for the pulse length of interest into CCPRx, clear 
>TMR1L, clear 
>> TMR1H, clear the CCPx LAT bit.  Once Timer1 is running and the CCP 
>> module is set to go high on match, all you need to do is clear the 
>> TMR1 registers and the appropriate LAT bit.
>>
>
>Thanks for the response! I'm just thinking ahead on a new 
>design. The datasheet seems to imply that the compare flip 
>flop is not the same as the output latch, which is why I did 
>not think a bcf of the latch bit would work. They could, of 
>course, reset both flip flops with the bcf. The datasheet and 
>ap notes just don't make that clear. Thanks for the ideas, 
>though! I'll give it a try in the next couple weeks when I 
>have the hardware ready to go.
>
>Harold

The last time I tried this on a 16F part, you could not set/reset the CCP pin until you had disabled the CCP module itself.  Of course, the 16F does not have a LATx register, so things may be different on the 18F.

Regards

Mike

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