SBC: Rockpro64 v2.1 4Gb
OS: ubuntu 18.04 minimal w / Mate' DE
Linux rockpro64 4.4.190-1233-rockchip-ayufan-gd3f1be0ed310 #1 SMP
Wed Aug 28 08:59:34 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
I'm working with the libgpiod library and noticed there is no GPIO
character device on the RockPro64. The GPIO character device exists
on the Odroid XU4, N2 & the Pi 3B. Is this unique to the Rockchip
family of ARM processors?
TIA,
/Faradn
~ Rockpro64 ~ Odroid N2 ~ Odroid XU4 ~ Pi 3B ~
(03-21-2020, 04:41 PM)tllim Wrote: [ -> ] (03-18-2020, 12:27 PM)Faradn Wrote: [ -> ]SBC: Rockpro64 v2.1 4Gb
OS: ubuntu 18.04 minimal w / Mate' DE
Linux rockpro64 4.4.190-1233-rockchip-ayufan-gd3f1be0ed310 #1 SMP
Wed Aug 28 08:59:34 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
I'm working with the libgpiod library and noticed there is no GPIO
character device on the RockPro64. The GPIO character device exists
on the Odroid XU4, N2 & the Pi 3B. Is this unique to the Rockchip
family of ARM processors?
TIA,
/Faradn
~ Rockpro64 ~ Odroid N2 ~ Odroid XU4 ~ Pi 3B ~
https://forum.frank-mankel.org/topic/292...p64-gpio/2
SBC: Rockpro64 v2.1 4Gb
OS: ubuntu 18.04 minimal w / Mate' DE
Linux rockpro64 4.4.190-1233-rockchip-ayufan-gd3f1be0ed310 #1 SMP
Wed Aug 28 08:59:34 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
Thank you TlLim.
My interest is with the libgoiod [C] library.
Hope all is well with you and yours.
TIA,
~ Rockpro64 ~ Odroid N2 ~ Odroid XU4 ~ Pi 3B ~
https://www.youtube.com/watch?v=ljOoGyCso8s
Hello,
According to this article:
https://www.beyondlogic.org/an-introduct...pberry-pi/
the new chardev GPIO interface has been introduced as of Linux 4.8.
I am using a recent Linux release from Mrfixit2001, and it has kernel 4.4.207.
Maybe it is necessary to wait for newer releases, to get the new GPIO interface?
Best regards,
Gienek.
(04-20-2020, 04:31 AM)Gienek Wrote: [ -> ]Hello,
According to this article:
https://www.beyondlogic.org/an-introduct...pberry-pi/
the new chardev GPIO interface has been introduced as of Linux 4.8.
I am using a recent Linux release from Mrfixit2001, and it has kernel 4.4.207.
Maybe it is necessary to wait for newer releases, to get the new GPIO interface?
Best regards,
Gienek.
Thanks
.
I'm now running Manjaro Arm v20.04 with kernel 5.6.0 and all (4)
gpiochip character devices exist.
/Faradn
O! I did not know about such difference between Linux releases for ROCKPro64.
Have you already gathered experience about performance of this new interface? It is very interresting!
I am using a set of own C-functions to handle GPIO. This is very fast and simple, but I miss one functionality: A possibility of async reaction to interrupt from GPIO. I have no clue, how to achieve this in purely user-space process.
Does this new interface allow for something, like select() which returns when GPIO pin changes state?
BR,
Gienek.
(04-21-2020, 06:41 AM)Gienek Wrote: [ -> ]O! I did not know about such difference between Linux releases for ROCKPro64.
Have you already gathered experience about performance of this new interface? It is very interresting!
I am using a set of own C-functions to handle GPIO. This is very fast and simple, but I miss one functionality: A possibility of async reaction to interrupt from GPIO. I have no clue, how to achieve this in purely user-space process.
Does this new interface allow for something, like select() which returns when GPIO pin changes state?
BR,
Gienek.
I'm using libgpiod-1.4.1.
Works very well on my Odroid N2.
Will begin testing on my RockPro64 shortly.
/Faradn