HPWM8 on 18f45k42?

[Jim Gregory]

The 18F2X/4X/5XK42 devices have four 10-bit hardware PWMs. They are PWM5, PWM6, PWM7, and PWM8. GCB only supports PWM1-7. Would it be much work to add PWM8? I'm working on a project where it would be useful.

-Jim
~ sent from my pedal-powered computer (pedalpc.com) ~

[Anobium]

A day or two. I had not spotten that those devices had PWM8.

Check back on Monday.

[Jim Gregory]

No hurry. Thanks!

[Anobium]

I just found a few moments to load and test. All ok.

Download from here. https://sourceforge.net/p/gcbasic/code/HEAD/tree/GCBASIC/trunk/include/lowlevel/pwm.h?format=raw

I have updated the Help to cover PMW8, we do not need a demo as this is the same as the other PWM channels.

Some example code using PMW8 on PPS/RA0. Use PPS to change the output port. Works as expected on the scope.

   'Chip Settings
    #chip 18F25K42, 64
    'Generated by PIC PPS Tool for Great Cow Basic
    'PPS Tool version: 0.0.5.24
    'PinManager data: v1.75
    'Generated for 18f25k42
    '
    'Template comment at the start of the config file
    '
    #startup InitPPS, 85
    #define PPSToolPart 18f25k42

    Sub InitPPS

            'Module: PWM8
            RA0PPS = 0x0010    'PWM8 > RA0

    End Sub
    'Template comment at the end of the config file



    DIR porta Out

    HPWM 8, 50, dutyvalue, 2
    wait 10 ms

    do

        'use for-loop to show the duty changing a 10bit value
        dim dutyvalue as word
        for dutyvalue = 0 to 1023
            HPWMUpdate 8, dutyvalue
            wait 10 ms
        next

    loop

[Jim Gregory]

Wow, you're incredibly fast! I was just going to write back and say it wasn't necessary--I figured out how to implement it using the CCP PWMs :-/