Internal pull-up

[Noone]

Hi,
I'm not able to use internal pull-up for GPIO-pins.

With Python code:

Code Select Expand

from pyA64.gpio import gpio
from pyA64.gpio import port
gpio.init()
gpio.setcfg(port.PE12, gpio.INPUT)
gpio.pullup(port.PE12, gpio.PULLUP)
gpio.input(port.PE12)
I always get '0' if nothing is connected to the line. With external pull-up everything works.

I'm I missing something here?

[LubOlimex]

Maybe it is not good enough for your application. What is the value of the external pull up that you connect? Maybe the internal has different value.

Did you try with other GPIO ports?

[Noone]

If I leave pin fully unconnected, pull-up is still not working. I tested with ports defined in

Code Select Expand

from pyA64.gpio import port
I'm using image
A64-OLinuXino-focal-minimal-20210127-100834.img

[LubOlimex]

What is the value of the external pull up that you connect? Maybe the internal has different value?

What do you expect is the value of the internal pull-up is?

[Noone]

Problem solved

Documentation linked from A64-OLinuXino product page is outdated.

Document (revision G, December 2022) behind the link (https://github.com/OLIMEX/OLINUXINO/blob/master/DOCUMENTS/OLIMAGE/Olimage-guide.pdf gives outdated instructions for Python.

Pull-ups (and everything else) work well with python3-gpiod https://pypi.org/project/gpiod/.

Brgs,
 Noone