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TMS320F28034: Application issues.

Reed
Expert 2010 points
Part Number: TMS320F28034


Tool/software:

Hi Team,

When using F28034, the touch screen communicates with F28034 through LIN port, and the panel communicates with F28034 through SCI port. During on-site operation, there may be a system crash, no output from the frequency converter, no motor rotation, the touch screen cannot read machine data, and the panel buttons do not respond. The only option is to power on again, but it can still work normally when powered on. Please help analyze what the reason is.
Attached touch screen and panel communication interface circuit:

  • 0
    TI__Mastermind 23990 points

    Hello Reed,

    Thanks for your inquiry. I have several initial questions and suggestions to help me understand the context:

    1. Is this an existing design that has been working before, but has changed in design (hardware/software) and/or behavior? Or is this LIN/SCI design under development and has not run correctly before?
    2. To clarify, are you using the LIN in SCI mode on F2803x? Can you please elaborate on what LIN/SCI settings you are configuring (multibuffer mode, specific interrupts, error interrupt settings, etc.).
    3. In general, it is quite difficult to tell what could be going wrong with the only described symptom being that the system/motor does not work. There are many different sources that could cause this (hardware connections, other devices, software configurations, user code). Have you been able to do a debug of the code? Can you connect to the device and step through the code, view register values, etc.? Are you able to isolate the F28034 communications to run your LIN/SCI in internal loopback mode to verify that the module is working on its own and that the issue is when interfacing with the system/panel? Please also describe any steps that have already been taken to narrow down the cause a bit more.
    4. Is the F28034 device still on/running normally when the error occurs? Or do you see a reset happen or any other indication of error (XRSn pulse, power rail monitoring, etc.)?
    5. Please note that we do not support schematic reviews on E2E, please reach out to your local field applications engineer (FAE) to inquire about this.

    Best Regards,

    Allison