PWM channels

[kender_a]

Colleagues,

PIC18F6720 has five (5) CCP/PWM pins, but CCS compiler has functions only for the two different frequencies and duty cycles. I need to configure all PWM pins for different frequency and duty cycle. Is it possible? How can it be done? Code sample will be appreciated the most.

Thanks!

Nick
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This message was ported from CCS's old forum
Original Post ID: 144517141

[R.J.Hamlett]

:=Colleagues,
:=
:=PIC18F6720 has five (5) CCP/PWM pins, but CCS compiler has functions only for the two different frequencies and duty cycles. I need to configure all PWM pins for different frequency and duty cycle. Is it possible? How can it be done? Code sample will be appreciated the most.
:=
:=Thanks!
:=
:=Nick
Have you actually tried it?...
If you look in the 'define' file for the 18F6720, is has define values for CCP channels up to 5, and the 'setup_ccp' function in the manual now shows support for all five channels. The 'set_pwmx_duty' function, though not (yet) documented, also happily works:
.................... setup_CCP5(CCP_PWM);
0038: MOVLW B7
003A: ANDWF FB1,F
003C: BCF F98.4
003E: BCF F8F.4
0040: MOVLW 0C
0042: MOVWF F70
.................... set_pwm5_duty(128);
0044: MOVLW 80
0046: MOVWF F71

Remember the manual often lags the compiler as new features like this are added to chips (they only update the manual every few years).

Best Wishes
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This message was ported from CCS's old forum
Original Post ID: 144517144