this thing is kicking my tail!

[llilrex]

I am trying to program a PIC18F4431 to do PWM outputs. and I am haveing a problem with the terminology.

PWM period = PWM Time Base Peroid Regester (PTPER)

so what the heck is PWM Time Base Register (PTMR)?

the datasheet isnt clear on this, when reading it I assumed that the time base regester controlled the period of the PWM cycle but reading further down the Time Base Period Register does it! I am so confused perhaps someone can elaborate on the difference. it would be much apreciated. thank you

[llilrex]

alright I feel stupid! the PTMR is the timer register and PTPER defines the period. whew I was starting to panic!

[FunnyNYPD]

Don't be upset, PICs is not user friendly on PWM and timer functions.
Enjoy your PIC fly.

[llilrex]

Yea the pic has thrown me for a loop a few times. its messed up because I am not new to them, but anyway that wasn’t the worst problem I have run into them with. Thanks for the encouragement

[James Routledge]

Do you really need to be writing data to those two registers?
I have written a Bipolar controller for a 16 series PIC and only needed to configure Timer2, and do the steps outlined in paragraph 15.5.3 of the datasheet and you should be home and dry.

I get the feeling that the registers you are talking about are used by the PIC itself during the PWM process and shouldn't be fiddled with.