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SOLVED - dsPIC33fj64GS610 - PWM generation

 
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joseph20480



Joined: 21 Dec 2011
Posts: 42

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SOLVED - dsPIC33fj64GS610 - PWM generation
PostPosted: Sun Mar 20, 2016 9:08 am     Reply with quote
Hi,

I'm trying to generate a pwm signal but nothing...
I use for that an Explorer 16 dev. board + dsPIC33fj64gs610.

I give you my code:
Code:

setup_timer3(TMR_INTERNAL|TMR_DIV_BY_1|TMR_CONTINUE_IDLE);
setup_capture(1, capture_off);
setup_compare(1,COMPARE_PWM_FAULT|COMPARE_TIMER3);
set_pwm_duty(1,1000); ;

If you see a big mistake, tell me please !

Last edited by joseph20480 on Mon Mar 21, 2016 2:02 am; edited 1 time in total
Ttelmah



Joined: 11 Mar 2010
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PostPosted: Sun Mar 20, 2016 10:02 am     Reply with quote
You are not giving the timer a 'time'. Second value for the setup, is the count at which it is to reset. So assuming (say) a 50% duty cycle:

setup_timer3(TMR_INTERNAL|TMR_DIV_BY_1, 2000);

Without this it'll default to 65535, so the actual pulse would be tiny.

I'm ignoring idle at the moment.

Then you have fault enabled. With this, the PWM will go off, unless the fault pin is in the clear state. Is it?. (OCFA).
joseph20480



Joined: 21 Dec 2011
Posts: 42

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PostPosted: Mon Mar 21, 2016 2:05 am     Reply with quote
sure.....
thanks !
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