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koeda
koeda
Associate
November 18, 2018
Question

I want to know why it stops with HardFault_Handler.

  • November 18, 2018
  • 2 replies
  • 1057 views

Hello

It may stop with the interrupt routine of HardFault_Handler.

MCU: STM32F446VCTx

Tools: CubeMX

IDE: IAR Embedded Workbench IDE

This routine is in stm32f4xx_it.c.

void HardFault_Handler(void)
{
 /* USER CODE BEGIN HardFault_IRQn 0 */
 
 /* USER CODE END HardFault_IRQn 0 */
 while (1)
 {
 }
 /* USER CODE BEGIN HardFault_IRQn 1 */
 
 /* USER CODE END HardFault_IRQn 1 */
}
 
 

Currently the status of the following registers is confirmed.

CFSR: Settable Fault Status Register INVSTATE bit is 1.

BFAR: The bus fault address register is 0xE000EDF8.

Registers above seem to be involved.

If you have detailed information, please explain the comment.

Attention, I am Japanese. This content is based on Google translation.

This topic has been closed for replies.

2 replies

Tesla DeLorean
Tesla DeLorean
Guru
November 18, 2018

Check you have adequate heap and stack to accommodate what you are doing.

Try to identify the instructions that are faulting, a while(1) loop is not very helpful for that.

In Keil I have this

HardFault_Handler\
 PROC
 EXPORT HardFault_Handler [WEAK]
 
 TST lr, #4 ; Determine correct stack
 ITE EQ
 MRSEQ R0, MSP ; Read MSP (Main)
 MRSNE R0, PSP ; Read PSP (Process)
 
 MOV R1, R4 ; Registers R4-R6, as parameters 2-4 of the function called
 MOV R2, R5
 MOV R3, R6 ; sourcer32@gmail.com
 
 EXTERN hard_fault_handler_c
 B hard_fault_handler_c
 ENDP
void hard_fault_handler_c(unsigned int * hardfault_args, unsigned int r4, unsigned int r5, unsigned int r6)
{
 printf ("\n[Hard Fault]\n"); // After Joseph Yiu
 
 printf ("r0 = %08X, r1 = %08X, r2 = %08X, r3 = %08X\n",
 hardfault_args[0], hardfault_args[1], hardfault_args[2], hardfault_args[3]);
 printf ("r4 = %08X, r5 = %08X, r6 = %08X, sp = %08X\n",
 r4, r5, r6, (unsigned int)&hardfault_args[8]);
 printf ("r12= %08X, lr = %08X, pc = %08X, psr= %08X\n",
 hardfault_args[4], hardfault_args[5], hardfault_args[6], hardfault_args[7]);
 
 printf ("bfar=%08X, cfsr=%08X, hfsr=%08X, dfsr=%08X, afsr=%08X\n",
 *((volatile unsigned int *)(0xE000ED38)),
 *((volatile unsigned int *)(0xE000ED28)),
 *((volatile unsigned int *)(0xE000ED2C)),
 *((volatile unsigned int *)(0xE000ED30)),
 *((volatile unsigned int *)(0xE000ED3C)) );
 
 while(1);
}

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koeda
koedaAuthor
Associate
November 18, 2018

Thank you for reply.

I'll give it a try.

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