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Raspberry Pi 3 Freescale Xtrinic KITMMA955xLEVM

Former Member

How do I communicate with a Freescale Xtrinic KITMMA955xLEVM evaluation board from a Raspberry Pi via USB?

I'm running LINUX and using Python 3.4

All the evaluation kit documentation points to the SensorToolBox software which is windows based.

It's not what I want anyway because I am looking to use the data in a robotics project.

I've connected the Xtrinic to the Raspberry Pi and it's picking up the USB port.

I have installed a Python USB pack and got a far as detecting whether it's plugged in but how do I read the data?

Everything I've found relating to the MMA9551 shows it plugged into the Raspberry Pi GPIO.

It must be possible to drive the evaluation board using the USB.

 

Can anyone help?

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  • 0

    What you say is true. The kit is nice for playing with the chip from Windows, but NXP does not tell how it communicates with the kit. Possible options:

    1. Take off sensor chip to use on GPIO pin. Since this looks like a SMT and small, not recommended.
    2. Try Windows 10 IOT on Raspberry Pi 3. Problem although this approach works, I would guess the application will not run under IOT.
    3. Find software to intercept USB communications while running the Windows application. This is like detective work and may yield results. Then you need to roll your own code to mimic this. Can you program in Python?

    Clem

Reply
  • 0

    What you say is true. The kit is nice for playing with the chip from Windows, but NXP does not tell how it communicates with the kit. Possible options:

    1. Take off sensor chip to use on GPIO pin. Since this looks like a SMT and small, not recommended.
    2. Try Windows 10 IOT on Raspberry Pi 3. Problem although this approach works, I would guess the application will not run under IOT.
    3. Find software to intercept USB communications while running the Windows application. This is like detective work and may yield results. Then you need to roll your own code to mimic this. Can you program in Python?

    Clem

Children
  • 0 in reply to clem57

    Thanks Clem for your prompt response.

     

    I was hoping for a protocol document, this is going to be much more difficult.

    I think I will run SensorToolBox on a PC with a USB monitor/analyser.

    This should allow me to determine the protocol and to reverse engineer the software interface.

     

    Yes I can program in Python. I've written serial interfaces before and they are never ease.

     

    I'll post the results once I have made some progress.

     

    Mike