Pic18f2320

[mpgmike]

The following is used on a PIC16F1824. Check your Data Sheet to double check the Special Function Registers as applicable to your chip:

; --- *** Timer 2 SFRs, Used for PWM Period *** --------------------------------
T2CON       =   %01111011               ;.2 = 1/0
PR2         =   %11111111
PIE1.1      =   0                       ;TMR2IE


; --- *** CCP1 PWM SFRs *** ----------------------------------------------------
CCP1CON     =   %00001100


DutyCycle   VAR WORD
CCPR1L      =   DutyCycle.LOWBYTE
;HIGHBYTE comes from bits in CCP1CON


;Fill in other pertinent set-up data.


Label:
    PIR1.1 = 0                      ;TMR2IF
    PIE1.1 = 1                      ;TMR2IE
    T2CON = %01111111               ;Turns TMR2 ON
do
    loop while PIR1.1 = 0           ;TMR2IF
    PIR1.1 = 0                      ;TMR2IF
    DutyCycle = ;desired PWM

Hope this helps.

[suded]

Hi Mike,
Thanks for your help, I need to use directly from PBP, I have an older version.
I'm thinking of using a single PWM PIC like PIC18F1320 to control two analogue values then use sample and hold get two outputs.
Regards,
Suded

[mpgmike]

Frequency is controlled by the scaler in T2CON and the value of PR2. The setting I'm using provides for the slowest frequency possible with my OSC speed; PR2 = $FF. The reason I do this the long way is PBP3 will actually toggle PR2 between 2 values to deliver the frequency requested in the HPWM command (HPWM 1,DutyCycle,Frequency). I needed a consistent cycle-to-cycle period timing and couldn't achieve it with HPWM.