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Anyone got PiFace Control & Display 2 working with RPi 2 Model B?

e14 Contributor

Installed as per instructions here but getting a Python error related to GPIO25 when trying to run sysinfo.py

 

pi@raspberrypi ~ $ sudo python3 /usr/share/doc/python3-pifacecad/examples/sysinfo.py

Traceback (most recent call last):

  File "/usr/lib/python3/dist-packages/pifacecommon/interrupts.py", line 363, in bring_gpio_interrupt_into_userspace

    with open(GPIO_INTERRUPT_DEVICE_VALUE):

IOError: [Errno 2] No such file or directory: '/sys/devices/virtual/gpio/gpio25/value'

 

During handling of the above exception, another exception occurred:

 

Traceback (most recent call last):

  File "/usr/share/doc/python3-pifacecad/examples/sysinfo.py", line 61, in <module>

    cad = pifacecad.PiFaceCAD()

  File "/usr/lib/python3/dist-packages/pifacecad/core.py", line 50, in __init__

    self.init_board()

  File "/usr/lib/python3/dist-packages/pifacecad/core.py", line 87, in init_board

    self.enable_interrupts()

  File "/usr/lib/python3/dist-packages/pifacecad/core.py", line 59, in enable_interrupts

    self.gpio_interrupts_enable()

  File "/usr/lib/python3/dist-packages/pifacecommon/interrupts.py", line 210, in gpio_interrupts_enable

    bring_gpio_interrupt_into_userspace()

  File "/usr/lib/python3/dist-packages/pifacecommon/interrupts.py", line 368, in bring_gpio_interrupt_into_userspace

    export_file.write(str(GPIO_INTERRUPT_PIN))

IOError: [Errno 16] Device or resource busy

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    EDIT: I suspect the problem may be related to the version of Raspian I was using: 2015-01-31-raspbian. I took the SD card out of the RPi 2 Model B and placed it into an older RPi which was known to work with the PiFace CAD 2. A similar error occurred as in the previous post. After downgrading the version of Raspian on the same older model RPi the PiFace CAD 2 then worked. Not sure what to do know whether to wait and see if Raspian gets an update or if the problem lies elsewhere? It would be useful to know if anyone else is having the same problem or if they have PiFace CAD 2 working on RPi 2 Model B running 2015-01-31-raspbian.

  • 0 in reply to e14 Contributor

    Hi Brett,

     

    Thank goodness!

     

    I had a working project. I built a new sd card to increase storage and then the project didn't work showing a very similar error you show above! I thought the piface had failed while I was building the new sd card.

     

    Thanks for posting this. I hope something is sorted soon. Did you say you can downgrade the Raspbian version?

     

    I hope something is sorted soon as I need to finish this project asap and now nothing works!

     

    Chris.

Reply
  • 0 in reply to e14 Contributor

    Hi Brett,

     

    Thank goodness!

     

    I had a working project. I built a new sd card to increase storage and then the project didn't work showing a very similar error you show above! I thought the piface had failed while I was building the new sd card.

     

    Thanks for posting this. I hope something is sorted soon. Did you say you can downgrade the Raspbian version?

     

    I hope something is sorted soon as I need to finish this project asap and now nothing works!

     

    Chris.

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