Hello,
I’m using a Beaglebone Black with a custom cape attached to it.
I created a device tree overlay for it (see the attached mycape.dts), which is almost working fine, except that I won’t receive any events using the C poll() function.
When I load the dts all Inputs/Outpus are muxed and exported automatically to the sysfs as expected. But only the “edge-file” gives me a none, instead of both.
I didn’t find any documentation for this. I only found the two options “count-rising-edge” and “count-falling-edge” which should enable the interrupts for this pin. But so far, it does not work for me…
So is there any way I can tell the device tree that I want to watch for both edges?
Trying to set the edge manually after loading the device tree overlay only gives me a write error: “Device or resource busy”.
If I remove the GPIO Part:
In0 { //GPIO-1[12] gpio-name = "Input0"; gpio = <&gpio2 12 0x00>; input; active-low; count-rising-edge; count-falling-edge; };Code hier eingeben...
and export & configure the inputs manually, the events are working!
So I think my C-Code should be fine…
I hope anyone can help me with this…
Thank you very much!
With best regards,
Sebastian
mycape.dts.txt (1.51 KB)