raspi-gpio | Dump the state of the BCM270x GPIOs
kandi X-RAY | raspi-gpio Summary
kandi X-RAY | raspi-gpio Summary
Dump the state of the BCM270x GPIOs
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QUESTION
I'm trying to enable pull-ups on Raspberry pi and the easier way to do it it's executing raspi-gpio set
, the problem is that for some reason I can't do it with call_usermodehelper
(it doesn't throw any error, but it does nothing).
As an alternative I've been looking at raspi-gpio source code and I have a functional C code that enables pull-ups (this code prints the GPIO CPU and enable GPIO26's pull-ups):
...ANSWER
Answered 2021-Oct-03 at 22:51Mmap was accessing to "/dev/mem", after some more questions I've found that that file connects user-space with kernel-space (and LKM it's on kernel space, so no need to access to it). In this case, ioremap
does the job.
Here's the final code:
QUESTION
From meta-raspberrypi I am using the rpi-hwup-image.bb recipe to build the image in which I have appended raspi-gpio_git recipe, but i am reciving the following error:
...ANSWER
Answered 2021-Jun-21 at 21:38_git is the version, just use raspi-gpio.
QUESTION
I got a bit stuck debugging a yocto build problem. I encountered this while updating from yocto warrior (2.7) to yocto dunfell (3.1) The build fails during the building of the rootfs, all steps before seem to work:
...ANSWER
Answered 2021-Feb-17 at 07:55I found it out myself (interesting how asking questions helps you thinking...):
The issue was in the systemd
recipe itself and related to the systemd-compat-units
recipe. I was able to fix it with this in my layer's recipes-core/systemd/systemd_%.bbappend
:
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