PWM using the 12F683

[pescador]

So is this command needed If I'm using any output pin? Does setting the OSC mode to 8Mhz do anything for the PWM as far as resolution or is 4Mhz good enough? (I'm dimming LEDs).

CCP1CON = %00001100 ' CCP1, PWM mode

and

OSCCON = %01110001 ' Internal 8MHz osc.
DEFINE OSC 8

[richard]

easy way

;pic12f683
#CONFIG
cfg = _INTOSCIO
cfg&= _WDT_ON
cfg&= _PWRTE_OFF
cfg&= _MCLRE_ON
cfg&= _CP_OFF
cfg&= _CPD_OFF
cfg&= _BOD_ON
cfg&= _IESO_ON
cfg&= _FCMEN_ON
  __CONFIG cfg
#ENDCONFIG


DEFINE OSC  8
OSCCON=$70
CMCON0    = 7
TRISIO   = %111011      ;gp2= output

ANSEL    =0
; hpwm Channel, Dutycycle, Frequency
  
hpwm     1,128,600   ;       50% 600 hz
 
mainloop:

; do stuff

goto mainloop

to do it manually

 TRISIO   = %111011      ;gp2= output
    t2con=5       ; set up timer/pr2  for frequency and pwm  bits   ; note this is not equivalent to above  resulting freq is ? [you work it out]
    PR2 = 255;
    CCPR1L = pulswidth     ; set pulsewidth high bits
    ccp1con=12             ; set ccp reg and or pulsewidth  low bits