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- unable to get gpio to work on Raspberry Pi 5 using latest image
unable to get gpio to work on Raspberry Pi 5 using latest image
- galrub
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05 Feb 2025 21:33 #320796
by galrub
unable to get gpio to work on Raspberry Pi 5 using latest image was created by galrub
Hello I am using the latgest build, rpi-5-debian-bookworm-6.12.11-arm64-ext4-2025-01-27-0140.img, on a RP 5, logged in with user 'cnc'
runing:
any ideas?
I notice some disccusions about this matter in the forum but non of the ideas there helped me,
I tried 'sudo gpasswd -a cnc gpio' but got the reply that cnc is already a member of gpio.
any help will be most welcomed.
runing:
uname -a
Linux raspberrypi 6.12.11 #1 SMP PREEMPT_RT Mon Jan 27 00:10:15 AEDT 2025 aarch64 GNU/Linux
halcmd -I
loadrt hal_gpio inputs=GPIO18,GPIO23,GPIO24,GPIO25,GPIO8 outputs=GPIO4,GPIO17,GPIO27,GPIO22,GPIO10,GPIO9,GPIO26
Note: Using POSIX realtime
hal_gpio: Failed to register input pin collection
hal_gpio: rtapi_app_main: Operation not permitted (-1)
<stdin>:1: waitpid failed /usr/bin/rtapi_app hal_gpio
<stdin>:1: /usr/bin/rtapi_app exited without becoming ready
<stdin>:1: insmod for hal_gpio failed, returned -1
loadrt hal_pi_gpio exclude=0xC3C03 dir=0x312839C
The Pi model 23 is not known to work with this driver but will be assumed to be be using the RPi2+ layout 40 pin connector
HAL_PI_GPIO: can't open /dev/gpiomem: 2 - No such file or directory
If the error is 'permission denied' then try adding the user who runs
LinuxCNC to the gpio group: sudo gpasswd -a username gpio
HAL_PI_GPIO: can't open /dev/mem: 13 - Permission denied
hal_pi_gpio: rtapi_app_main: Operation not permitted (-1)
<stdin>:2: waitpid failed /usr/bin/rtapi_app hal_pi_gpio
<stdin>:2: /usr/bin/rtapi_app exited without becoming ready
<stdin>:2: insmod for hal_pi_gpio failed, returned -1
any ideas?
I notice some disccusions about this matter in the forum but non of the ideas there helped me,
I tried 'sudo gpasswd -a cnc gpio' but got the reply that cnc is already a member of gpio.
any help will be most welcomed.
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- andypugh
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09 Feb 2025 18:44 #321090
by andypugh
Replied by andypugh on topic unable to get gpio to work on Raspberry Pi 5 using latest image
It is possible that hal_gpio is not working because libgpiod is not installed
What does: sudo apt-get install libgpiod say?
What does: sudo apt-get install libgpiod say?
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- unknown
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09 Feb 2025 23:02 - 09 Feb 2025 23:19 #321128
by unknown
Replied by unknown on topic unable to get gpio to work on Raspberry Pi 5 using latest image
It does work, 2 users have had a couple of users have confirmed it.
I've also confirmed myself that loading of the driver as given in the docs also works.
Taking GPIO8 out of the input list allows the driver to load correctly. Which makes sense as GPIO08 as well as GPIO07 seemed to be claimed.
section lifted from gpioinfo
"GPIO7" "spi0 CS1" output active-low [used]
"GPIO8" "spi0 CS0" output active-low [used]
Commenting out spi out in /boot/broadcom/config.txt "fixes" the issue.
I've also confirmed myself that loading of the driver as given in the docs also works.
Taking GPIO8 out of the input list allows the driver to load correctly. Which makes sense as GPIO08 as well as GPIO07 seemed to be claimed.
section lifted from gpioinfo
"GPIO7" "spi0 CS1" output active-low [used]
"GPIO8" "spi0 CS0" output active-low [used]
Commenting out spi out in /boot/broadcom/config.txt "fixes" the issue.
halcmd: loadrt hal_gpio inputs=GPIO18,GPIO23,GPIO24,GPIO25,GPIO8 outputs=GPIO4,GPIO17,GPIO27,GPIO22,GPIO10,GPIO9,GPIO26
Note: Using POSIX realtime
halcmd: show pin
Component Pins:
Owner Type Dir Value Name
4 bit IN FALSE hal_gpio.GPIO10-out
4 bit IN FALSE hal_gpio.GPIO17-out
4 bit OUT FALSE hal_gpio.GPIO18-in
4 bit OUT FALSE hal_gpio.GPIO18-in-not
4 bit IN FALSE hal_gpio.GPIO22-out
4 bit OUT FALSE hal_gpio.GPIO23-in
4 bit OUT FALSE hal_gpio.GPIO23-in-not
4 bit OUT FALSE hal_gpio.GPIO24-in
4 bit OUT FALSE hal_gpio.GPIO24-in-not
4 bit OUT FALSE hal_gpio.GPIO25-in
4 bit OUT FALSE hal_gpio.GPIO25-in-not
4 bit IN FALSE hal_gpio.GPIO26-out
4 bit IN FALSE hal_gpio.GPIO27-out
4 bit IN FALSE hal_gpio.GPIO4-out
4 bit OUT FALSE hal_gpio.GPIO8-in
4 bit OUT FALSE hal_gpio.GPIO8-in-not
4 bit IN FALSE hal_gpio.GPIO9-out
4 s32 OUT 0 hal_gpio.read.time
4 s32 OUT 0 hal_gpio.write.time
Last edit: 09 Feb 2025 23:19 by unknown.
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