error: Hard Fault Handler

HI,currently i am working on project based on stm32f407 chip.my development work has been stopped since two days as i have stuck in hard fault handler. Please  guide me how to trace the fault ???i tried every possible way i could.but result in nothing.Pls help me out.thanks in advance

Parents
  • Hi kiran1986,

    first of all, you should find the cause of the hard fault. To do so, the contents of the stack frame of the hard fault handler would help you. The following is the hard fault handler code from the freescale Kinetis sample codes (sorry I don't have STM environment).

    /* Exception frame without floating-point storage
    * hard fault handler in C,
    * with stack frame location as input parameter
    */
    void
    hard_fault_handler_c(unsigned int * hardfault_args)
    {
        unsigned int stacked_r0;
        unsigned int stacked_r1;
        unsigned int stacked_r2;
        unsigned int stacked_r3;
        unsigned int stacked_r12;
        unsigned int stacked_lr;
        unsigned int stacked_pc;
        unsigned int stacked_psr;
       
        //Exception stack frame
        stacked_r0 = ((unsigned long) hardfault_args[0]);
        stacked_r1 = ((unsigned long) hardfault_args[1]);
        stacked_r2 = ((unsigned long) hardfault_args[2]);
        stacked_r3 = ((unsigned long) hardfault_args[3]);
       
        stacked_r12 = ((unsigned long) hardfault_args[4]);
        stacked_lr = ((unsigned long) hardfault_args[5]);
        stacked_pc = ((unsigned long) hardfault_args[6]);
        stacked_psr = ((unsigned long) hardfault_args[7]);
       
        printf ("[Hard fault handler]\n");
        printf ("R0 = %x\n", stacked_r0);
        printf ("R1 = %x\n", stacked_r1);
        printf ("R2 = %x\n", stacked_r2);
        printf ("R3 = %x\n", stacked_r3);
        printf ("R12 = %x\n", stacked_r12);
        printf ("LR = %x\n", stacked_lr);
        printf ("PC = %x\n", stacked_pc);
        printf ("PSR = %x\n", stacked_psr);
    #ifndef CW
        printf ("BFAR = %x\n", (*((volatile unsigned long *)(0xE000ED38))));
        printf ("CFSR = %x\n", (*((volatile unsigned long *)(0xE000ED28))));
        printf ("HFSR = %x\n", (*((volatile unsigned long *)(0xE000ED2C))));
        printf ("DFSR = %x\n", (*((volatile unsigned long *)(0xE000ED30))));
        printf ("AFSR = %x\n", (*((volatile unsigned long *)(0xE000ED3C))));
    #else
        printf ("BFAR = %x\n", (*((volatile unsigned int *)(0xE000ED38))));
        printf ("CFSR = %x\n", (*((volatile unsigned int *)(0xE000ED28))));
        printf ("HFSR = %x\n", (*((volatile unsigned int *)(0xE000ED2C))));
        printf ("DFSR = %x\n", (*((volatile unsigned int *)(0xE000ED30))));
        printf ("AFSR = %x\n", (*((volatile unsigned int *)(0xE000ED3C))));
    #endif
        for(;;)
        {}
    }
    
    

    Best regards,
    Yasuhiko Koumoto.

Reply
  • Hi kiran1986,

    first of all, you should find the cause of the hard fault. To do so, the contents of the stack frame of the hard fault handler would help you. The following is the hard fault handler code from the freescale Kinetis sample codes (sorry I don't have STM environment).

    /* Exception frame without floating-point storage
    * hard fault handler in C,
    * with stack frame location as input parameter
    */
    void
    hard_fault_handler_c(unsigned int * hardfault_args)
    {
        unsigned int stacked_r0;
        unsigned int stacked_r1;
        unsigned int stacked_r2;
        unsigned int stacked_r3;
        unsigned int stacked_r12;
        unsigned int stacked_lr;
        unsigned int stacked_pc;
        unsigned int stacked_psr;
       
        //Exception stack frame
        stacked_r0 = ((unsigned long) hardfault_args[0]);
        stacked_r1 = ((unsigned long) hardfault_args[1]);
        stacked_r2 = ((unsigned long) hardfault_args[2]);
        stacked_r3 = ((unsigned long) hardfault_args[3]);
       
        stacked_r12 = ((unsigned long) hardfault_args[4]);
        stacked_lr = ((unsigned long) hardfault_args[5]);
        stacked_pc = ((unsigned long) hardfault_args[6]);
        stacked_psr = ((unsigned long) hardfault_args[7]);
       
        printf ("[Hard fault handler]\n");
        printf ("R0 = %x\n", stacked_r0);
        printf ("R1 = %x\n", stacked_r1);
        printf ("R2 = %x\n", stacked_r2);
        printf ("R3 = %x\n", stacked_r3);
        printf ("R12 = %x\n", stacked_r12);
        printf ("LR = %x\n", stacked_lr);
        printf ("PC = %x\n", stacked_pc);
        printf ("PSR = %x\n", stacked_psr);
    #ifndef CW
        printf ("BFAR = %x\n", (*((volatile unsigned long *)(0xE000ED38))));
        printf ("CFSR = %x\n", (*((volatile unsigned long *)(0xE000ED28))));
        printf ("HFSR = %x\n", (*((volatile unsigned long *)(0xE000ED2C))));
        printf ("DFSR = %x\n", (*((volatile unsigned long *)(0xE000ED30))));
        printf ("AFSR = %x\n", (*((volatile unsigned long *)(0xE000ED3C))));
    #else
        printf ("BFAR = %x\n", (*((volatile unsigned int *)(0xE000ED38))));
        printf ("CFSR = %x\n", (*((volatile unsigned int *)(0xE000ED28))));
        printf ("HFSR = %x\n", (*((volatile unsigned int *)(0xE000ED2C))));
        printf ("DFSR = %x\n", (*((volatile unsigned int *)(0xE000ED30))));
        printf ("AFSR = %x\n", (*((volatile unsigned int *)(0xE000ED3C))));
    #endif
        for(;;)
        {}
    }
    
    

    Best regards,
    Yasuhiko Koumoto.

Children
More questions in this forum