PWM on PIC16F88

[mister_e]

DARGH! Maybe not, just read the datasheet and the PM >INC file CCPMX should set ON.

CCPMX_ON equ 2FFF0000h ; X0 XXXX XXXX XXXX
CCPMX_OFF equ 2FFF1000h ; X1 XXXX XXXX XXXX

in datasheet... you'll find
<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=709&stc=1&d=1136747056 ">

NOW, what about

@ DEVICE MCLR_OFF, INTRC_OSC, WDT_ON, LVP_OFF, BOD_OFF, PWRT_ON, PROTECT_ON, CCPMX_ON
OSCCON=$60 ' use internal 4MHZ osc
PAUSE 100 ' start-up delay
TRISB=0
DEFINE CCP1_REG PORTB 
DEFINE CCP1_BIT 3 
HPWM 1,1000,128
HERE: GOTO HERE

[peterdeco1]

Thanks Steve but I think Melanie is right - time for a lot of beer. Followed your code exactly and the PWM still comes out on RB0. Do you have any other ideas I can try when I get sober?

[mister_e]

i'll check that later tonight with my own stuff.

[mister_e]

well i just tried that one...

@ DEVICE MCLR_ON, INTRC_OSC, WDT_ON, LVP_OFF, BOD_OFF, PWRT_ON, PROTECT_OFF, CCPMX_ON
OSCCON=$60 ' use internal 4MHZ osc
PAUSE 100 ' start-up delay
TRISB=0
DEFINE CCP1_REG PORTB 
DEFINE CCP1_BIT 3 
HPWM 1,128,1000
HERE: GOTO HERE

no big difference on the previous,just correcting the way i wrote HPWM, enable the MCLR and remove CodeProtect... it's working on RB3 as it's suppose to.

BTW i'd attach the .HEX file to dump on your PIC. Let's assume that it could be a compiler problem... maybe.

let us know.

PS just rename .txt to .hex

[peterdeco1]

Hi Steve. I copied your code exactly and it still outputs only on RB0. I suspect my programmer and/or software is the problem. There is an option "CCP1 on RB3" that works on the 16F818 but the option is "grayed out" when I program the 16F88. I guess it will not allow the use of RB3. I think it's time to get the latest hardware/software from Microchip. Thank you for your help.

[peterdeco1]

That was it. My software was forcing CCP1 onto RB0, while MPLAB software shows "CCP1 ON RB3". Thanks Everybody.

[Dick Ivers]

peterdeco1,

What programmer software and hardware are you using that causes the problem? We would all like to know. We want to avoid running in to the same difficulties.