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output_bit & delay question

 
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javi.ar



Joined: 17 Feb 2006
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output_bit & delay question
PostPosted: Mon Jul 24, 2006 3:08 pm     Reply with quote
Hi:

I have a question (newbie of course) regarding output_bit,
I need to place hex "words" bytes on a pin, this should be 1 = 50us high & 50us low and 0 = 100us high & 100us low.
Is the only chance to use the delay_us() command for keeping the port high & low in conjuntion with output_bit. I�ve tried with PWM and compare but I had no succeded (yet).

Thanks a lot.
Iam using 18f452 with 4MHZ XTAL and 8MHZ clock. but none of this is mandatory... just testing and learning, the goal is develop a dcc command / decoder for scale trains . Thanks a lot in advance as usual...
PCM programmer



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PostPosted: Mon Jul 24, 2006 5:00 pm     Reply with quote
Quote:
Is the only chance to use the delay_us() command for keeping the port high & low ?

Look at the CCP and ECCP Tips 'n Tricks document from Microchip.
See Tip #8 for an idea of the general concept.
http://ww1.microchip.com/downloads/en/DeviceDoc/41214a.pdf
javi.ar



Joined: 17 Feb 2006
Posts: 59
Location: Argentina

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PostPosted: Mon Jul 24, 2006 5:36 pm     Reply with quote
Thanks a lot...
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