Simple PWM Module Example
Posted: Sat Apr 04, 2015 8:35 pmI am dusting off my firewing hardware (Pic24) and was wondering if there is a simple PWM library example?
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Posted: Sat Apr 04, 2015 8:35 pmRe: Simple PWM Module Example
Posted: Mon Apr 06, 2015 7:08 amHave you tried looking at here http://www.firewing.info/forum/viewtopic.php?f=7&t=156&p=901&hilit=pwm#p900 ?
Re: Simple PWM Module Example
Posted: Mon Apr 06, 2015 4:02 pmYou could also check here http://www.firewing.info/pmwiki.php?n=Library.PWM
Re: Simple PWM Module Example
Posted: Mon Apr 06, 2015 4:20 pmb.o.g, Ah great link. I saw the first post about the other forum reference. However, the library reference was exactly what I was looking for! Thanx Ryan
Re: Simple PWM Module Example
Posted: Mon Apr 06, 2015 4:57 pmNo problem, it's a simple library to use with only 4 routines 
without going off topic how's the RGB123 Ryan? I still have mine 
without going off topic how's the RGB123 Ryan? I still have mine Re: Simple PWM Module Example
Posted: Mon Apr 06, 2015 5:09 pmb.o.g. thanks for the help. Firewing looks like its growing into an awesome platform. A few more examples and I think getting started will be alot easier. I've been doing most of my development on the BBB and linux debian these days. It's both good and bad 
. RGB-123 is going pretty well. It's really all about managing production schedules and new control methods. We are looking to develop an "enterprise" (wank word alert) solution that's alot less DIY here in the near future.
and bad . RGB-123 is going pretty well. It's really all about managing production schedules and new control methods. We are looking to develop an "enterprise" (wank word alert) solution that's alot less DIY here in the near future.Re: Simple PWM Module Example
Posted: Wed Apr 08, 2015 9:49 amI did update the PWM library module but have not released it yet, if someone wants to test. Basically, it allows you to use
and it should calculate and set all pre-scale and max duty available automatically. Much easier to use. I've attached versions for PIC18, PIC24 and PIC32. The main library folders can be found under
- Code: Select all
Pwm.SetFrequency(<freq-value>)
and it should calculate and set all pre-scale and max duty available automatically. Much easier to use. I've attached versions for PIC18, PIC24 and PIC32. The main library folders can be found under
- Code: Select all
C:\ProgramData\Mecanique\Firewing\Library\lib.imports\MCU08\Pwm.bas
C:\ProgramData\Mecanique\Firewing\Library\lib.imports\MCU16\Pwm.bas
C:\ProgramData\Mecanique\Firewing\Library\lib.imports\MCU32\Pwm.bas
Re: Simple PWM Module Example
Posted: Sat Nov 11, 2017 1:06 pmDoes this work in the last update of Firewing?
OK I just import this PWM.bas.....
Thanks
OK I just import this PWM.bas.....
Thanks
Re: Simple PWM Module Example
Posted: Sat Nov 11, 2017 1:44 pmOK I have replaced the original pwm.bas with this one in the library.
Have used Pwm.setfrquency(1000) in my program and loading Adc.Read(A2) into the PWM
But the PWM signal is only adjusting a fraction of the duty.
Is this setting the PWM as 16bit and not 10bit as it originally was? Hence the shorter duty scale?
Have used Pwm.setfrquency(1000) in my program and loading Adc.Read(A2) into the PWM
But the PWM signal is only adjusting a fraction of the duty.
Is this setting the PWM as 16bit and not 10bit as it originally was? Hence the shorter duty scale?
Re: Simple PWM Module Example
Posted: Mon Nov 13, 2017 9:54 amThe number of bits is determined by the system clock freq and the pwm freq.
After calling SetFrequency(), a call to MaxDuty() will return the max value you can use to set the duty cycle in Write().
If you're using Adc.Read(A2) to set the duty cycle, make sure it's no larger than MaxDuty().
After calling SetFrequency(), a call to MaxDuty() will return the max value you can use to set the duty cycle in Write().
If you're using Adc.Read(A2) to set the duty cycle, make sure it's no larger than MaxDuty().