Code from PIC18F8722 to PIC18F4550
Hi,
Important Im using 4550 because is what I have at hand, but any pic with 3 simultaneous PWM work for me
I'm experimenting with RGB leds and to test my program I used a 18f8722 VSM because I dont have the model for the 18f4550
I have the code working, mostly by following advice from Bruce (rentron) in different posts across this forum.
I dont know how to translate the 3rd PWM port I use in the 18f8722, here is my code:
Code:
DEFINE OSC 4
' Word vars for 10-bit value of each PWM duty cycle
Duty1 VAR WORD ' Channel #1
Duty2 VAR WORD ' #2
Duty3 VAR WORD ' #3
Rval var word
Gval var word
Bval var word
' Set CCPx pins to outputs
TRISC.2=0 ' CCP1 output
TRISC.1=0 ' CCP2 output (could also be assigned to RB3)
TRISG=0 ' CCP3 output
trisa=%00000111
' Set CCP modules to PWM mode
CCP1CON = %00001100 ' Mode select = PWM
CCP2CON = %00001100 ' Mode select = PWM
CCP3CON = %00001100 ' Mode select = PWM
' Set period up for 1.22kHz PWM freq
PR2 = $7F
' Set TMR2 up for 1:16 prescale & turn it on
T2CON = %00000110 ' TMR2 ON 1:16 prescale
mainloop:
Adcin 0, Bval
serout porta.3,2,[#Bval,"."]
Adcin 1, Rval
serout porta.3,2,[#Rval,"."]
Adcin 2, Gval
serout porta.3,2,[#Gval,"."]
serout porta.3,2,[10,13]
Duty1 = Bval *2
CCP1CON.4 = Duty1.0 ' Setup 10-bit duty cycle as
CCP1CON.5 = Duty1.1 ' a 10-bit word
CCPR1L = Duty1 >> 2
Duty2 = Rval *2
CCP2CON.4 = Duty2.0
CCP2CON.5 = Duty2.1
CCPR2L = Duty2 >> 2
Duty3 = Gval *2
CCP3CON.4 = Duty3.0
CCP3CON.5 = Duty3.1
CCPR3L = Duty3 >> 2
Goto mainloop
End
I dont know how to translate CCP3CON.
Help needed & appreciated.
Thanks
Pablo
