• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 101 subscribers
  • Views 561 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DM3725 Arm IRQ interrupt problem with continuous data reading

paddu padmaja
Intellectual 290 points

hi all,

 i implemented arm interrupt generation code in ccs 5.1, but if i continuously receive data through interrupt it stuck at data abort or prefetch abort how can i resolve my issue?? i am using UART3_IRQ interrupt. Same hang problem faced in x-load code also in linux .... plz help me..

thanks in advance

  • 0
    TI__Guru 65405 points
    Hi Paddu,

    Could you add some log messages which could be useful for investigating of the issue.

    BR
    Tsvetolin Shulev
  • 0 in reply to Cvetolin Shulev-XID
    Intellectual 290 points
    hi Shulev,

    whenever it get data abort or prefetch abort i handled data abort and prefetch abort in that wehn it goes to where it stuck at that instruction it seems that INTCPS_SIR_IRQ register address is corrupted. Means when i debug code in CCS, after data abort is occur in data abort returns to where it stuck at that instruction INTCPS_SIR_IRQ register address is copied to some core registers like R12 , so when we put cursor at that asm instructio nR12 is shows some wrong address. So if it reads from wrong address it went again to undefined or something else.. i am giving the my interrupt handler code see once and tell me if any bug..

    #define INTCPS_SIR_IRQ 0x48200040
    __interrupt void Irq_iSR(){

    // asm(" STMFD SP!, {R0-R12, LR}");

    asm(" MRS R11, SPSR");

    if((INREGL(INTCPS_SIR_IRQ)) == 74){ //UART3_IRQ ,M_IRQ 74
    Char = *RHR_REG;

    UARTRxBuf[WrCnt_UART++]= Char;
    WrCnt_UART&= 0x3FF;
    }

    OUTREGL(0x01,0x48200048);//INTCPS_CONTROL

    // asm(" MOV R0, #0");
    // asm(" MCR P15, #0, R0, C7, C10, #4");

    asm(" MSR SPSR, R11");
    // asm(" LDMFD SP!, {R0-R12, LR}");

    // asm(" MRS R11,SPSR");
    asm(" MSR CPSR_c, R11");
    asm(" MOV PC, LR");

    }

    thanks

    BR

    padmaja