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Alternate PWM Pin assignment for PIC12F1822

 
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dave_s



Joined: 18 Aug 2011
Posts: 8

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Alternate PWM Pin assignment for PIC12F1822
PostPosted: Mon Oct 10, 2011 8:21 am     Reply with quote
How do I assign PWM output to PIN_A5?
The code below still outputs PWM on PIN_A2 (default).
Code:

#byte APFCON = getenv("SFR:APFCON")
#bit CCP1SEL = APFCON.0

void main()
{
CCP1SEL = 1;
}
Ttelmah



Joined: 11 Mar 2010
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PostPosted: Mon Oct 10, 2011 9:15 am     Reply with quote
If you are using the CCP setup after this, it'll override the setting. It has it's own setting to use this:
Code:

   setup_ccp1(CCP1_A5); //Put CCP1 output on A5


Best Wishes
dave_s



Joined: 18 Aug 2011
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PostPosted: Mon Oct 10, 2011 10:14 am     Reply with quote
Using the setting below does not output any PWM on either pin.
Does the timer need to be redirected?

setup_ccp1(CCP1_A5); //Put CCP1 output on A5
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Mon Oct 10, 2011 12:37 pm     Reply with quote
1. Post your compiler version.

2. Post a short but complete (compilable) pwm test program that shows
the failure.

This is an example of a short but compilable test program:
http://www.ccsinfo.com/forum/viewtopic.php?t=45185&start=1
You need to post something similar to that (especially that it's short).
Ttelmah



Joined: 11 Mar 2010
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PostPosted: Mon Oct 10, 2011 2:58 pm     Reply with quote
As with several other chips, _you_ have to set the TRIS if you switch the PWM to the alternate pin. The default code sets it up for the default pin, but doesn't handle it when switched to the alternative.....

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