How to generate pwm signal on the pin c5 ?

mahdifahime · Joined: 05 Jan 2013 Posts: 22

I want to generate pwm signal on the pin C5 but I can't. Crying or Very sad

Please help me.

temtronic · Posted: Sun Jan 06, 2013 1:52 pm

hmmm..according to my PIC16F72 datasheet, the CCP1 pin is RC2 NOT RC5....

mahdifahime · Joined: 05 Jan 2013 Posts: 22

I understand that the CCP1 pin is RC2 but I want to use RC5 instead of RC2

temtronic · Posted: Sun Jan 06, 2013 2:42 pm

In that case ,you'll have to write your own PWM code.
Details you'll have to work out are frequency (Hz...KHz), resolution(# of bits) and range (0%-100% PWM).

I'm pretty sure CCS does supply an example in the 'examples' folder of the compiler.

Simplest software PWM doesn't use an ISR which means nothing else can be done. Using an ISR allows for 'multitasking'. Choice is yours.

hth
jay

mahdifahime · Joined: 05 Jan 2013 Posts: 22

But i saw that generate pwm on portb or portc or porta. How to generate!!!!!??????
Even in language basic can generate pwm on port sightly

Ttelmah · Joined: 11 Mar 2010 Posts: 19510

You cannot, on this chip.
Many of the later chips with things like the ECCP module, support 'pulse steering', allowing you to route the CCP signal to specific other pins, but the 16F72, _only_ supports one hardware PWM output, on pin C2.
As others have said, you can (at a much lower frequency) perform software PWM on any pin. There is an example for servo control in the code library, but all will involve a lot of processor time.
You have read something incorrect, or incorrectly.

Best Wishes

mahdifahime · Joined: 05 Jan 2013 Posts: 22

It mean I can't do it?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Use software PWM on pin C5. Example:
http://www.ccsinfo.com/forum/viewtopic.php?t=37807&start=3