Hi all.
After some experimentation, I've found that it's not the emulator that
is causing the PWM problem - the same thing happens on the real chip
too.
I'm hoping someone can help me here, I'm stumped. What happens is this,
on initilisation, the PWM starts off fine, both channels pump it out,
correct duty cycle and all. When I go to change the duty cycle however,
the output flatlines. But the ICEPIC shows all the registers are
correctly set up. Here's the initialisation code :

; Setup PWM registers
 BANKSEL PR2
 movlw 0x3F
 movwf PR2

 BANKSEL TMR2
 clrf TMR2

 movlw 0x0E
 BANKSEL CCPR1L
 movwf CCPR1L
 ;clrf CCPR1L

 BANKSEL CCPR2L
 movwf CCPR2L
 ;clrf CCPR2L

 BANKSEL TRISC
 bcf  TRISC,1
 bcf  TRISC,2

 BANKSEL T2CON
 movlw 0x05
 movwf T2CON

 BANKSEL CCP1CON
 movlw 0x0F
 movwf CCP1CON
 BANKSEL CCP2CON
 movwf CCP2CON

 PAGESEL MainLoop
 call MainLoop


And here is the code that changes the duty cycle :

 BANKSEL PWM_Data
 movf PWM_Data,W
 BANKSEL CCPR1L
 movwf CCPR1L

 movlw 0x0F

 BANKSEL CCP1CON
 clrf CCP1CON
 movwf CCP1CON

 BANKSEL CCP2CON
 clrf CCP2CON
 movwf CCP2CON

 PAGESEL MainLoop
 goto MainLoop


Anyone spot anything ?


--
Mark Dennehy, B.A., B.A.I.  Email : Mark.Dennehy@cs.tcd.ie
Research Student,
Computer Vision and Robotics Research Group,
Computer Science Dept., Trinity College Dublin