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  • Wagon56
  • Wagon56
06 Feb 2025 20:00
Raspberry Pi5 GPIO setup was created by Wagon56

Raspberry Pi5 GPIO setup

Category: Configuration Tools

Hello everyone, ive been trying to set up linuxcnc to work with my Raspberrypi 5 for a week or two now, ive gotten to a point where i can load the hal_pi_gpio driver with no errors showing up, i have a config running in linuxcnc and i can see in halshow that the pins are activating and deactivating, the issue i have is that the pins only activate and deactivate in the software and not physically, i cannot measure any difference on the physical pin itself, i can use gpioset command to set the pins to high or low manually and that works well, but as soon as i try setting it to high/low using halcmd it just doesnt change state, i would greatly appreciate some assistance in setting this up correctly.

The hal file below was given as an example somewhere online, dont remember exactly where i got it but it is as mentioned supposed to work considering that halshow shows the pins and the fact that they should be changing state.
  • Grad
  • Grad
06 Feb 2025 16:00
Replied by Grad on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

I do not know how you guys even got so far: i have a Raspberry Pi 5 Modell B, 4x 2,4 GHz, 4 GB DDR4 and created images of v. 2.9.4 to SD card & USB drive with 3 different burning software including balenaEtcher. When i boot the RPi5 the drives are not recognized (as bootable) at all. With an image of vanilla Ubuntu it works just fine.
  • jairobbo
  • jairobbo
06 Feb 2025 08:33
Replied by jairobbo on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

You are absolutely right. I was extremely happy to see it run successfully :)
Now I need only connect the right PIN's since between hal_pi_gpio and hal_gpio the pin numbering is physical / BMC.

Anyway I appreciate your effort to help out
JAiro
  • unknown
  • unknown
06 Feb 2025 07:35 - 06 Feb 2025 07:39
Replied by unknown on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

On the loadrt line you are trying to assign GPIO12 twice
loadrt hal_gpio inputs=GPIO3,GPIO5,GPIO6,GPIO4
outputs=GPIO12,GPIO23,GPIO16,GPIO11,GPIO20,GPIO10,GPIO24,GPIO19,GPIO21,GPIO12,GPIO26,GPIO13

The you have done this, trying to use GOIO12 twice
net xstep stepgen.0.step => hal_gpio.GPIO12-out
net adir stepgen.3.dir => hal_gpio.GPIO12-out
You need to fix these issues
You may need to increase your base period over 10000, I tried 15000.
And as you did not supply your postgui_call_list.hal I had to comment out that line, to get everything to load.
  • jairobbo
  • jairobbo
06 Feb 2025 06:26
Replied by jairobbo on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

These are my HAL and INI files:

drive.google.com/drive/folders/1ZyTfg1zN...FlzQlUXC?usp=sharing
  • jairobbo
  • jairobbo
06 Feb 2025 06:24
Replied by jairobbo on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

that is remarkable, because I flashed the latest image for pi5 for the second time and double checked my HAL and INI files. (the 'help' was indeed misplaced, and set this discussion on the wrong leg)

This is my loadrt command:

loadrt hal_gpio inputs=GPIO3,GPIO5,GPIO6,GPIO4 outputs=GPIO12,GPIO23,GPIO16,GPIO11,GPIO20,GPIO10,GPIO24,GPIO19,GPIO21,GPIO12,GPIO26,GPIO13

I will try to attach my ful config below.

this is from the report:

Debug file information:
Note: Using POSIX realtime
Failed to register output pin collection
hal_gpio: rtapi_app_main: Operation not permitted (-1)
./my-mill.hal:7: waitpid failed /usr/bin/rtapi_app hal_gpio
./my-mill.hal:7: /usr/bin/rtapi_app exited without becoming ready
./my-mill.hal:7: insmod for hal_gpio failed, returned -1
4465
Stopping realtime threads
Unloading hal components
Note: Using POSIX realtime

I ready that there is still tricky stuff related to get the pi5 going with hal_grpio, but I don't know exactly what it is.

kind regards,
Jairo
  • behai
  • behai
06 Feb 2025 01:58
Replied by behai on topic PNCConf, Mesa 7I96S: "You are using a simulated-realtime version of LinuxCNC..."

PNCConf, Mesa 7I96S: "You are using a simulated-realtime version of LinuxCNC..."

Category: PnCConf Wizard

Actually I've just had another thought, what version of RPi imager are you using and what particular OS ?
I'm not a windows user and some people have had issues with RPi imager ?
Do you uncompress the downloaded file or just point RPi imager to the compressed file ?

Cheers
Rob
 

Hi Rob,

Thank you for your help and new information: I have missed the two links you posted on the previous reply.

I am using Ubuntu 24.04 Noble Wombat and Raspberry Pi Imager V1.8.5 to write image.

I downloaded the linuxcnc.org/iso/rpi-4-debian-bookworm-6...25-01-27-0404.img.xz and use it as is.

I did check the kernel with uname -a, and the output is Linux raspberrypi 6.12.11 #1 SMP PREEMPT_RT Mon Jan 27 02:47:25 AEDT 2025 aarch64 GNU/Linux.

AND I HAVE BEEN ABLE TO GET PNCCONF's Test/Tune Axis to test the X-axis motor: thank you again Rob.

-- For PNCCONF to work, we need to use menu-config to set Locale to en US.UTF8, after setting the locale, I had to restart the machine, otherwise the locale does not seem to take effect immediately.

To verify the machine locale, on a terminal window, run the locale.

Best regards,

...behai.


 
  • PeanutBlade
  • PeanutBlade
05 Feb 2025 22:19
Replied by PeanutBlade on topic LinuxCNC with raspberry Pi5. Ethercat and step/dir interface.

LinuxCNC with raspberry Pi5. Ethercat and step/dir interface.

Category: General LinuxCNC Questions

Thank you for all the feedback.
I think I will go fully EtherCAT for this machine to simplify the design and avoid multiple communication interfaces in a single machine.Mesa Ethernet or FlexiHAL controllers seem like a perfect fit for my second machine.
  • galrub
  • galrub
05 Feb 2025 21:33
unable to get gpio to work on Raspberry Pi 5 using latest image was created by galrub

unable to get gpio to work on Raspberry Pi 5 using latest image

Category: Advanced Configuration

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:
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.
  • unknown
  • unknown
05 Feb 2025 21:20
Replied by unknown on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

The permissions for user CNC include group membership for gpio which is required. You do not need to change anything.
If you copy and paste the loading of the module from the man page it will work.
The problem was when you tried to load the module you inserted the word help. The driver wouldn't load because of "invalid parameter help".
Undo whatever you have done regarding udev. Reboot.
The permissions and group membership are setup whilst building the image.
Once again reread the man page, try loading the driver as shown in the example on the man page. If that doesn't work copy and paste the text on the terminal.
Remember with Linux that every character matters. Don't take any shortcuts and if something doesn't work as expected check what you typed and recheck your understanding of what should happen.
  • jairobbo
  • jairobbo
05 Feb 2025 20:55
Replied by jairobbo on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

no of course, I apologize, but there is I believe a problem related to hal_gpio.
I read the man page and there were some discrepancies in my code, I was hoping the permissions fix from the man page would be the fix, but it wasn't

Good luck to all!
  • unknown
  • unknown
05 Feb 2025 14:34
Replied by unknown on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

I'll have to leave this to Rod & others. It's not something I could really test other than the installation bit.
  • zmrdko
  • zmrdko's Avatar
05 Feb 2025 13:57
Replied by zmrdko on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

regarding EtherCAT driver for rpi5 ethernet:

gitlab.com/etherlab.org/ethercat/-/issues/104

RPi 5 uses the

macb
driver (Cadence GEM) and not
genet
. So I guess you have to use a Raspberry Pi 4 if you want a native driver.

  • behai
  • behai
05 Feb 2025 11:51
PNCConf, Mesa 7I96S: "You are using a simulated-realtime version of LinuxCNC..." was created by behai

PNCConf, Mesa 7I96S: "You are using a simulated-realtime version of LinuxCNC..."

Category: PnCConf Wizard

Hi,

Please help with the following problem. On PNCConf when I click the button Test/Tune Axis to test my X-axis, the following message appears:

[
You are using a simulated-realtime version of LinuxCNC, so testing/tuning of hardware is unavailable.
]

WHAT DOES THIS MEAN, PLEASE?

My environment is as follow:

Mesa 7I96S, power supply is MEAN-WELL MDR-10-5 ( 5V, 2A ).
7I96S IP is addres is 10.10.10.10, I can ping it. And PNCConf has been able to discover the card.

Computer: Raspberry PI 4B

Operating system: Debian Bookworm 12,
Kernel: "Linux picnc 6.6.59-rt45-v8-behai-rt-build+ #1 SMP PREEMPT_RT Sat Nov  2 10:20:46 AEDT 2024 aarch64 GNU/Linux"

PNCConf: BETA Version 1
LinuxCNC: 2.9.3

ONLY ONE closed-loop Nema23 driver CL57T: Which I configure to be the X-axis.

The wiring of CL57T to 7I96S is as below. This has been suggested by Mr. PCW.

[
7I96S       CL57T
+5V          PUL+
STEP0-    PUL-
+5V         DIR+
DIR0-      DIR-

CL57T's SW3 Set for 5V mode.
]

Even though I have only one motor and one driver, I still have to configure Y, tandem Y2 and Z axes as per the screenshot below:

File Attachment:


On the X Motor page, clicking on the Test/Tune Axis button, the above mentioned message appears:

File Attachment:


Please note: I built the kernel myself. I have also built LinuxCNC from the source myself back in November, 2024.

What have I done wrong, and how to fix it, please?

Thank you and best regards,

...behai.
 
  • rodw
  • rodw's Avatar
05 Feb 2025 11:39
Replied by rodw on topic LinuxCNC on Raspberry Pi 5

LinuxCNC on Raspberry Pi 5

Category: Installing LinuxCNC

Don't overthink it.
The drivers in Ethercat refer to optimised RT Ethernet NIC drivers. There is a generic driver we use and then some hardware specific ones for install and broadcom, I assumed there would be generic driver support.
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