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MSP432P401R: Ramdom faultISR

ANtonio Pezuela
Intellectual 585 points
Part Number: MSP432P401R


Hi,

 My code is faulty. When in I pause the execution I got this error:

/* This is the code that gets called when the processor receives a fault        */
/* interrupt.  This simply enters an infinite loop, preserving the system state */
/* for examination by a debugger.                                               */
static void faultISR(void)
{
    /* Enter an infinite loop. */
    while(1)
    {
    }
}

¿What means? ¿How can I investigate it?

Best regards,

  • 0
    TI__Mastermind 22640 points

    Hello Antonio,

    As the comments in the code mention, the execution has reached the faultISR as the code has performed some illegal operation. For details of the illegal operations that could trigger faultISR, please refer section "1.5.2 Exception Types" in the Technical Reference Manual www.ti.com/.../SLAU356

    Investigating the cause of the fault and trying to identify the root cause can be tricky and time consuming. Sections 1.5 and 1.6 can help in investigating the source of the fault. You could also try to narrow down the section of code that is causing the fault by stepping through or using breakpoints.

    Thanks,
    Sai

    Edit: Updated link.

  • 0
    Guru 26200 points
    Hello Antonio,

    why do you call your issue as a random fault?
    I do believe that your application logic is behind the issue and I will do my best to help you.

    First of all, the Cortex-M architecture uses a uniform mechanism for saving program context information on the stack.
    Could you post the following values from the stack, of course, after you have paused your code within faultISR()?

    SP+00 R0
    SP+04 R1
    SP+08 R2
    SP+12 R3
    SP+16 R12
    SP+20 LR
    SP+24 PC
    SP+28 xPSR

    Very often the PC points to the offending instruction.
    Without a view into your code and into your debugger I cannot do any steps forward.
    If you can post your code, it would be easier to resolve your issue.
    If you cannot, the issue fixing will take longer.
    My zone is GMT+2 summer time.

    Do you use red or black, or custom board?
    Please post details about your environment like versions of CCS, compiler, RTOS, driverlib, ...
  • 0 in reply to Sai Reddy
    Guru 26200 points

    Hello Sai,

    nice to see that I am not the only one.
    Clicking on your link I have got a message:

    Sorry! We couldn't find your page.

    It is because you have placed a dot after an http link.


    It is frustrating issues.
    Hundreds of faulty links on e2e per week, additional questions, answers, extended time to resolved.
    Probably one Java guy took full stack of classes and class loaders to convert a real http address to a form displayed in your post.
    Probably he wrote less instructions to achieve this really good http address representation on e2e forum than I wrote in reply to you.
    Only one thing he has missed, or not missed, is a mandatory dot in English sentence syntax.

    Could you help to improve time to resolved?

  • 0
    Guru 26200 points
    Antonio,

    I am glad that you have so quickly resolved your issue.
    What was the key?
  • 0 in reply to Tomasz Kocon
    Intellectual 585 points
    Tomasz, I will collect my enviroment info and will update this post. Sorry yesterday was late for me.
  • 0 in reply to ANtonio Pezuela
    Guru 26200 points

    Antonio, no problem. 2-3 a.m. is enough.
    Did you experienced task stack overflow or something more tricky?

    I am really interested in resolving you issue without any hints from you.
    Stack overflow is my first assumption, however my goal is to do it methodically.

  • 0 in reply to Tomasz Kocon
    TI__Mastermind 22640 points
    Since the original question of this post is answered, I will close this post. If further assistance is required, please click the link "Ask a related question".

    Thanks,
    Sai

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