Hello,
Using https://pypi.org/project/pyA64/ project, I am able to drive some GPIO (PE port)
The problem is I can't drive PB0 to PB4. The pins are not listed in the lib.
If I use the manual adress for PB0 to PB4, I still can not drive this ports.
Side note: PL port is said to not be accessible in user space. If I still want to access this port, what is the method ?
Thanks.
What Linux image are you using? Is it the latest Olimage image?
What does:
uname -a
returns.
Hi Lub,
Olimage version A64-OLinuXino-bionic-base-20201217-194545.img
Kernel:
Linux a64-olinuxino 5.8.18-olimex #122632 SMP Wed Dec 16 12:28:30 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux
My script to trigger PB3 (note it works with PE17 attached to the LED):
from pyA64.gpio import gpio
from pyA64.gpio import port
#led = port.PE17
#try to set PB3
#pin = (ord('B')-ord('A'))*32+3
pin = (2-1)*32+3
gpio.init()
gpio.setcfg(pin, gpio.OUTPUT)
gpio.output(pin, 1)
pyA64 version 0.1.0
Tested with a scope on pin PB3
thanks
Quote from: oli_sbr on January 19, 2021, 11:40:31 AMHi Lub,
Olimage version A64-OLinuXino-bionic-base-20201217-194545.img
Kernel:
Linux a64-olinuxino 5.8.18-olimex #122632 SMP Wed Dec 16 12:28:30 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux
My script to trigger PB3 (note it works with PE17 attached to the LED):
from pyA64.gpio import gpio
from pyA64.gpio import port
#led = port.PE17
#try to set PB3
#pin = (ord('B')-ord('A'))*32+3
pin = (2-1)*32+3
gpio.init()
gpio.setcfg(pin, gpio.OUTPUT)
gpio.output(pin, 1)
pyA64 version 0.1.0
Tested with a scope on pin PB3
thanks
Can you execute "olinuxino-overlays" command and tell us, if uart2 overlay is enabled?
uart2 is disabled.
I also disabled LCD and I2C0 overlay, it changes nothing.
Update:
Using A64-OLinuXino-bionic-base-20201217-194545.img
I was able to drive the pins I wanted, using sysfs (read / write in /sys/class/gpio*).
So I think the issue is in the pyA64 project, and not in the kernel config or overlays.
Thanks for the update I was going to test with the sysfs today. The pyA64 project was made for Armbian images and I don't think it was recently updated, probably it is not compatible with latest Olimage images.
OK.
More info that might help other people.
I am using Buildroot as final tool to generate the system.
Since sysfs is deprecated, I am using libgpiod that is available for buildroot.
https://github.com/brgl/libgpiod
Works like a charm :)