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  • bladekel
  • bladekel
22 Jun 2025 09:07 - 22 Jun 2025 09:09

(SOLVED) hal_gpio: Operation not permitted fault cannot be solved

Category: HAL

But I have tried both adding gpio to user and not adding. (They were with fresh image install)
I hav read all that link before writing here but nothing changed.
I am using hal and ini files from another working rpi5. Their user names, file names and locations are same.
If i added hal_gpio to hal file, it gives an error about permission.
I added gpio to user, not worked.
I have created 90-gpio-access file as it described, not worked....
The only thing that I havent tried is SPI... I will try it and write here...
  • AdelRTP
  • AdelRTP
22 Jun 2025 08:09
Replied by AdelRTP on topic Modbus connection issue mesa 7i76eu pktUART

Modbus connection issue mesa 7i76eu pktUART

Category: General LinuxCNC Questions

I try man hm2_modbus
and man mesambccc
not exist in my linuxcnc i have the last version 2.9.4 i see in linuxcnc official site this is the last version, if there is newest version tell me please
 
  • workshop54
  • workshop54
22 Jun 2025 07:28

7i77 +-10V outputs: unexpected voltage with analogena, no output with analogout

Category: Driver Boards

Hi all,I’m running into an issue with my 7i77 analog outputs and could really use some help figuring it out.Setup:
  • 7i94 + 7i77 + 7i84
  • LinuxCNC with Mesa HAL configuration
  • QtDragon GUI
The issue:
  • When I set hm2_7i94.0.7i77.0.1.analogena to True, I measure about 0.3V on all +-10V outputs, even without setting any value on an analogout<>.
  • When I set a value on one of the analogout<> pins (e.g. analogout2 = 0.1) and leave analogena False, I measure no voltage on the corresponding output.
  • What I expected:
    • No voltage at the +-10V outputs just by enabling analogena.
    • A voltage at the specific output only when both analogena is enabled and an analogout<> value is set.
My question:

Is this normal behaviour, or am I missing something in the configuration or wiring? What should I check next to diagnose this? 

 



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