hpwm more than 2 ch possible in pbp?????????

[oscar]

im so duhhhhhhhhhh.. lol the no ccp3 mystery is sloved... i somehow had another chip type selected!!!!!

question.... would their be any reason with the code u gave me bruce as to why ch2 hpwm2 that is flickers when at a low value?


thanx

oscar

[Bruce]

What exactly do you mean by flicker?

[mister_e]

is this LED flickering happen only with channel2 ? what about if you change the frequency?

[oscar]

hiya lads...

hmmmmm ch3 ie the one i couldnt get to work in the firsr place works 100% nice smooth dimming etc.. ch2 flickers like mad !! the code is the exact same for all 3 ch's with the exception of register names etc.

me thinks this is not possible...................... i have gone through everything here 10 times over.!!!

[Bruce]

What happens if you enable only 1 channel at a time?

I.E. CCP1CON=0 : CCP3CON=0

Does channel 2 still flicker?

Are you sure it's not the circuit channel 2 is connected
to that's causing the flicker?

[oscar]

yet again tis me thats at fault.... many thanx to bruce for his code example. the mistake i was making was that i was calling the hpwm routine which seemed to be causing a conflict. instead i just wrote the duty val directly to the port ie portb.5=duty5 ... simple! lol this took many hours of hair loss and alcohol !!!!!!. only 1 teeny weeny prob left lol... i cant get the ch's to go to full off . they get to say 9% and stay there. so a faint glow is visible but apart from that everything is aok. dimming is as smooth as a babys ass and im a happy bunny.( irish saying).. many many thanks to bruce n the rest of u guys.. slainte...

thanx
oscar.

[peu]

Im refloating this thread because I have a question:

I tried the example provided by Bruce succesfully, but now I want to use ON Interrupt on portb changes.

The problem I encounter is that CCP3 uses RB5 and the interrupt is triggered by changes in the portb.4 to portb.7

What can be done?

Thanks