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Change pwm 18f4431

 
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jacob
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Change pwm 18f4431
PostPosted: Sat Aug 08, 2009 6:19 am     Reply with quote
Hi...I wanna move PWM0,1 to PWM6,7.
I tried to change PWMCON0 (01010000) for enable all PWM.
It's still out at PWM0,1 ....... I have no idea how it work.
Code:

MOVLW    0x00
MOVWF    PTCON0

MOVLW    0xC0
MOVWF    PTCON1

MOVLW    0x20
MOVWF    PWMCON0

MOVLW    0x01
MOVWF    PWMCON1

MOVLW    0b00001110   
MOVWF    DTCON

CLRF     PTMRL
CLRF     PTMRH

MOVLW    0x00           
MOVWF    PTPERH

MOVLW    0xFF           
MOVWF    PTPERL

MOVLW    0xFF
MOVWF    OVDCOND

MOVLW    0x00
MOVWF    OVDCONS

Thanks a lot.....!!! Crying or Very sad
Ttelmah
Guest
PostPosted: Sat Aug 08, 2009 7:30 am     Reply with quote
You can't.....
Look at Fig17-1.
PWM 6/7, are the outputs for channel 3. You can't move the channel 0 outputs 'to' these.
You need to enable/use channel3, to get outputs on these pins.

Best Wishes
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Aug 08, 2009 10:59 am     Reply with quote
This post shows how to enable PWM on the six channels of the 18F4431:
http://www.ccsinfo.com/forum/viewtopic.php?t=37206&start=2

Also, this is a C forum for the CCS compiler. If you're programming
in MPASM, then you should ask your questions in the Microchip PWM
forum:
http://www.microchip.com/forums/tt.aspx?forumid=36

Or, in the Microchip 16-bit core (i.e., 18F PICs) forum:
http://www.microchip.com/forums/tt.aspx?forumid=7
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