On 2020-04-06 06:17, furkan bodur wrote:
Hello everyone,
I am trying to make an simple HMI system . I am using LittlevGL with BSD
framebuffer. Thanks to Vijay, I made a lot of progress, but I can't
figure it out how to use touchscreen or any input devices. I followed
LVGL docs and tried to work with evdev drivers but it doesn't work.
I used input.h and other necessary headers from rtems-libbsd and my app
successfully compiled but when I run it on the Beagle Black, I am
getting "unable open evdev interface:: No such file or directory" error
in serial screen.
I checked the files in Serial screen and noticed that there is no input
folder in the /dev directory, as in Linux systems. I think that's the
reason of the error, but I don't know where I made the mistake.
Any suggestions for me to use evdev properly?
I can see there is evdev code in libbsd so at least it is present. Are
you able to confirm the evdev code is being built and linked into your
application?
On FreeBSD I have ...
$ ls -las /dev/input
total 1
1 dr-xr-xr-x 2 root wheel 512 Mar 21 08:22 .
1 dr-xr-xr-x 11 root wheel 512 Mar 21 08:22 ..
0 crw------- 1 root wheel 0xc Mar 21 08:22 event0
0 crw------- 1 root wheel 0x29 Mar 21 08:22 event1
0 crw------- 1 root wheel 0x8f Mar 22 13:42 event2
0 crw------- 1 root wheel 0xa3 Mar 21 08:23 event4
but I am not sure how they were created.
Chris
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