How to get SPI module up and running

npurtschert

Hi,

https://wiki.up-community.org/Pinout_UP2#SPI_Ports

I runned all the steps described here but still get no SPI devices:

14:02:50 | [email protected]:/opt/gps/ledpython # ls /dev/spi*
ls: cannot access '/dev/spi*': No such file or directory

I am trying to get a python program running and my guess is the SPI configuration:

14:13:40 | ... # python led.py
Traceback (most recent call last):
File "led.py", line 9, in
spi = mraa.Spi(0)
File "/usr/lib/python2.7/dist-packages/mraa.py", line 2100, in init
this = _mraa.new_Spi(*args)
ValueError: Error initialising SPI bus

Could you please help me to get SPI running?

... uname -srv

Linux 4.10.0-42-generic #5000~upboard10-Ubuntu SMP Tue Dec 19 12:58:48 UTC 2017

Kurt

My guess is that you do not have UP specific kernel that supports this. That is if I do the uname -srv I see:
[email protected]:~$ uname -srv
Linux 4.4.0-2-upboard #12-Ubuntu SMP Thu Dec 1 15:01:52 UTC 2016
[email protected]:~$
I am running Ubuntu 16.04 and followed the steps in: https://wiki.up-community.org/Ubuntu
The one I am running is an Original UP board... might be different for UP2 or up core?

But as I mentioned it looks like you are running the generic kernel: inux 4.10.0-42-generic

npurtschert

The weird thing is that in: https://wiki.up-community.org/Ubuntu they have the same as me:

---From the web page---
$ uname -srv
Linux 4.10.0-42-generic #5000~upboard9-Ubuntu SMP Tue Dec 12 11:46:16 UTC 2017

Perhaps I should try this: http://wiki.up-community.org/Ubuntu#Instruction_for_Legacy_Ubuntu_Version_.28only_for_up_board.29 ?

Perhaps there is an Issue with the UP² board?

npurtschert

Well I solved it. In the page: https://wiki.up-community.org/Pinout_UP2#SPI_Ports ist says that following command should be made

sudo ./install_hooks && sudo acpi-add spidev*

what I reallized is that the files were not executable so I made

chmod +x acpi-add acpi-upgrades install_hooks

and then run the command

sudo ./install_hooks && sudo ./acpi-add spidev*

Check! It is not the same as described in the page!

ccalde

Hi @npurtschert ,

That's great! Thanks for the update!

Cloud you please mark this discussion as SOLVED?

Thank you!

npurtschert

@ccalde Sure. How? I don't find any button to do that

ccalde

@npurtschert , it is only redefining the discussion tittle as [RESOLVED] How to get SPI module up and running

Cheers!

m_kramar

I had similar problem and seems like chmod made the difference. Admin should update the wiki page!

DCleri

updated, thanks!