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Compiler/TDA4VM: It seems system dump while the AppUtils_Printf() is called in the task hook function switchFxn

Huang GL
Prodigy 70 points
Part Number: TDA4VM

Tool/software: TI C/C++ Compiler

Dear Sir:

  I want to check task stack in the taskHook switchFxn, and print the warning while the stack used over 90%.

  but the system maybe dump when the AppUtils_Printf() is called in the switchFxn.

  my pdk : psdk_rtos_auto_j7_07_00_00_11

  I am not sure that it is a bug. or the AppUtils_Printf() should not be invoked in the switchFxn.

    --and I find it's ok while AppUtils_Printf() is called in the createFxn.

Regards,

Huanggl

  • 0
    TI__Genius 10355 points

    Hi Huanggi,


    From which core are you trying this? If you are printing from a remote core like DSP/R5F you will need to call board init first which will initialize and allocate memory for the print statements to be stored in memory and the A72 prints the contents of the buffer in UART console.

    Regards,
    Shyam

  • 0
    Guru 41995 points

    I am not familiar with this system, but printf() takes a lot of stack by itself, so you might be running out out stack when you use it to report that you are low on stack.

  • 0 in reply to Shyam Jagannathan
    Prodigy 70 points

    Hi Shyam,

    >From which core are you trying this?

       MCU1_0.

      and only mcu1_0 is running, AppUtils_Printf() output string via UART.

    regards,

    Huanggl

  • 0 in reply to Huang GL
    TI__Guru* 77174 points

    Hi,

    Keith Barkley said:
    I am not familiar with this system, but printf() takes a lot of stack by itself, so you might be running out out stack when you use it to report that you are low on stack.

    Can you try just setting a flag in the hook function when the stack increases over a certain threshold and then print in the main task? Did you try that?

    Regards,

    Karan