HPWM problems

Hello,

does anybody know the usage of CCP1(PWM) modul in PIC16F876?

I have some problems, which I can not solve by myself.

1. I can reach frequency 100Hz on channel 1 only by 455KHZ resonator (HPWM pin,var,850). Does it exist some software solution (i.e. with timer settings by 4 MHZ clock)?

2. I would like to synhronize beginning of PWM pulse with outside frequency 50 HZ. Can CCP modul be activated with outside pin (INT)? I have tried to set register CCP1CON=11, but times of activation were not constant.
Can anybody explain all other settings for HPWM?

Thank you for your help in advance.

Samo, Slovenia

If you want to serve such slow frequencies, it might be better to do it by software with a INT-routine and timers.

You want to do a dimmer for 50Hz ?

Hi Samo,

Check this link;
http://www.picbasic.co.uk/forum/showthread.php?t=4994

and download the nice program of mister_e's.

It will give you what you need.


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Yes bigWumps, this will be a used for 50 Hz heater regulator. Do you have any working schema for this application?

Samo