[beagleboard] Re: Threading for Beagle Bone

The code below uses inotify to watch an input pin and trigger when the "value" of the pin changes. Copy the code to inotify.c then: To build it: gcc inotify.c -lpthread -o inotify To run it: ./inotify /sys/class/gpio/gpio26/value In this example gpio26 is set up as an input and

[beagleboard] Re: hardware trouble, BBB can't boot successfully

Have you tried booting with the most recent Debian IoT image? If this works then you can eliminate hardware problems. Is there a reason you want to use a 4 year old kernel? On Friday, December 22, 2017 at 9:50:24 AM UTC-6, vinker vinker wrote: > > Hi， > I got a BBB a few days ago. It

[beagleboard] Is libpruio supported in Debian IoT?

debian@beaglebone:~$ uname -a Linux beaglebone 4.4.91-ti-r133 #1 SMP Tue Oct 10 05:18:08 UTC 2017 armv7l GNU/Linux debian@beaglebone:~$ sudo apt-get install am335x-pru-package [sudo] password for debian: Reading package lists... Done Building dependency tree Reading state information... Done

Re: [beagleboard] Measure frequency of a square wave input without PRU?

As far as I can tell there is no support in the Debian kernel for the eCAP feature. You can use eCAP to output a PWM signal but I can't find anything that supports the eCAP capture feature. On Tuesday, November 28, 2017 at 8:44:53 AM UTC-6, Jason Kridner wrote: > > > > On Nov 28, 2017, at

Re: [beagleboard] Measure frequency of a square wave input without PRU?

I wrote a C program that uses inotify to watch the gpioxx/value file. It can see changes up to 20kHz, so 3kHz should be no problem at all. On Tuesday, November 28, 2017 at 8:44:53 AM UTC-6, Jason Kridner wrote: > > > > On Nov 28, 2017, at 12:50 AM, Drew Fustini > wrote: >

[beagleboard] Re: Using eCap feature in Python

Using C code and the inotify interface, I was able to capture GPIO pulses on "/sys/devices/platform/ocp/44e07000.gpio/gpio/gpio26/value" up to 20kHz. It would be nice to use the eCAP registers though. Thanks for the feedback. On Friday, December 15, 2017 at 2:25:57 PM UTC-6, Dennis Lee

[beagleboard] Using eCap feature in Python

I would like to use the eCap feature to measure the frequency of a square wave, preferably with Python. I see examples for generating a square wave using the BBIO.PWM module but I can't find anything for reading the eCap. The BBIO.Encoder module looks promising. Can I use this to measure the