Thank you Ketul and Worth Burruss that would be really useful for testing. I am adding these suggestion to my proposal https://goo.gl/cGCXbS. Any other suggestions are welcome. :-)
On Thu, Mar 24, 2016 at 10:54 AM, Ketul Shah <ketulshah1...@gmail.com> wrote: > Hi Punit, > > Apart from what Worth Burruss suggested, > > First of all setting on off timing and testing on LED would be OK for > primary testing. > > You can always test your PWM signals on DSO/CRO to have a clear picture of > what is happening over signals. > > And if you can manage to have second BBB you can test signals on it too:- > http://hackaday.com/2015/02/19/turn-your-beagleboneblack-in-to-a-14-channel-100msps-logic-analyzer/ > > Also thinking towards a bit application side, > > Using PWM signals you can very DC motor speed using motor driver IC. > RGB Led would be a great visual to test it and many more.... > > Hope this helps for your further testing... > > Ketul > > On 23 March 2016 at 19:51, Worth Burruss <wo...@motioncontrol.org> wrote: >> >> On 23 Mar 2016 at 0:57, punit vara wrote: >> >> > Hi Worth Burruss, >> > >> > This year I proposed a plan (https://goo.gl/cGCXbS) to develop Beagle >> > bone black BSP which includes PWM drivers as well as I2C driver. Could >> > you please suggest me testing methods to test PWM on BBB ? >> > >> > Regards, >> > Punit >> > >> >> Punit, >> >> I will preface this with my solutions tend to be overly complex and I do >> not know specifically >> what is available to use to test with in the BBB. So this may not be what >> you are looking for. >> It also depends on the frequency of your PWM signals. >> >> When I think of test on hardware, I want to know it is working the way I >> think it is working >> (proving correctness). For PWM, this means the duty cycle is correct. I >> would be using >> another hardware counter timer to measure the High time followed by the >> Low time and doing >> the math to prove that the times are correct for the programmed duty >> cycle. >> >> As an alternate, with appropriate selection of PWM frequency and software >> timers, you can >> do the High and low counting using the timers. >> >> As for me, I would find it hard to see the change in an LED's intensity >> except in a crude >> fashion, so would not meet my personal goal of proving correctness. But >> you may be >> thinking of ON and OFF times in seconds, In which case an LED and maybe a >> stop watch >> would be appropriate. >> >> Hopefully this gives you some ideas. >> >> Thank you, >> >> Worth Burruss >> >> >> >> >> _______________________________________________ >> devel mailing list >> devel@rtems.org >> http://lists.rtems.org/mailman/listinfo/devel > > _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
