嵌入式系统异常程序远程定位

Posted 2020-08-14 xtusir

void hard_fault_lr_pc(U32 *usHardFault)
{
    usStack_R14 = usHardFault[5];
    usStack_R15 = usHardFault[6];
    
    BKP_WriteBackupRegister(BKP_DR3, usHardFault[5]>>16);
    BKP_WriteBackupRegister(BKP_DR4, usHardFault[5]&0xffff);
    
    BKP_WriteBackupRegister(BKP_DR5, usHardFault[6]>>16);
    BKP_WriteBackupRegister(BKP_DR6, usHardFault[6]&0xffff); 
}
__ASM uint32_t __HardFaultException (void)
{
    extern hard_fault_lr_pc
    TST LR,#4
    ITE EQ
    MRSEQ R0, MSP
    MRSNE R0, PSP
    B hard_fault_lr_pc
}
/**
  * @brief  This function handles Hard Fault exception.
  * @param  None
  * @retval None
  */

void HardFault_Handler(void)
{
  //BKP_WriteBackupRegister(BKP_DR2, HARDFAULT);
  __HardFaultException();
  while(1)
  {
  }
}