HardFault_Handler 输出日志信息

之前文章说了原理，这里把最终实现的代码总结：

IAR

 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;

   stacked_r0 = ((unsigned long) hardfault_args[]);

   stacked_r1 = ((unsigned long) hardfault_args[]);

   stacked_r2 = ((unsigned long) hardfault_args[]);

   stacked_r3 = ((unsigned long) hardfault_args[]);

   stacked_r12 = ((unsigned long) hardfault_args[]);

   stacked_lr = ((unsigned long) hardfault_args[]);

   stacked_pc = ((unsigned long) hardfault_args[]);

   stacked_psr = ((unsigned long) hardfault_args[]);

   printf ("\r\n[Hard fault handler - all numbers in hex]\r\n");

   printf ("R0=%x\r\n",stacked_r0);

   printf ("R1=%x\r\n",stacked_r1);

   printf ("R2=%x\r\n",stacked_r2);

   printf ("R3=%x\r\n",stacked_r3);

   printf ("R12=%x\r\n",stacked_r12);

   printf ("LR[R14]=%x subroutine call return address\r\n",stacked_lr);

   printf ("PC[R15]=%x program counter\r\n",stacked_pc);

   printf ("PSR=%x\r\n",stacked_psr);

   printf ("BFAR=%x\r\n",(*((volatile unsigned long *)(0xE000ED38))));

   printf ("CFSR=%x\r\n",(*((volatile unsigned long *)(0xE000ED28))));

   printf ("HFSR=%x\r\n",(*((volatile unsigned long *)(0xE000ED2C))));

   printf ("DFSR=%x\r\n",(*((volatile unsigned long *)(0xE000ED30))));

   printf ("AFSR=%x\r\n",(*((volatile unsigned long *)(0xE000ED3C))));

   printf ("SCB_SHCSR=%x\r\n", SCB->SHCSR);

   while ();

 }

hard_fault_handler_c

 void HardFault_Handler( void )

 {

 __ASM("TST LR, #4");

 __ASM("ITE EQ");

 __ASM("MRSEQ R0, MSP");

 __ASM("MRSNE R0, PSP");

 __ASM("B hard_fault_handler_c");

 }

HardFault_Handler

这里的HardFault_Handler里是内联汇编

MDK不能使用内联汇编

 __ASM void HardFault_Handler(void)

 {

       TST lr, #     // Test for MSP or PSP

       ITE EQ

       MRSEQ r0, MSP

       MRSNE r0, PSP

       IMPORT HardFault_Handler_C

       B HardFault_Handler_C

 }

HardFault_Handler

 void HardFault_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;

   stacked_r0 = ((unsigned long) hardfault_args[]);

   stacked_r1 = ((unsigned long) hardfault_args[]);

   stacked_r2 = ((unsigned long) hardfault_args[]);

   stacked_r3 = ((unsigned long) hardfault_args[]);

   stacked_r12 = ((unsigned long) hardfault_args[]);

   stacked_lr = ((unsigned long) hardfault_args[]);

   stacked_pc = ((unsigned long) hardfault_args[]);

   stacked_psr = ((unsigned long) hardfault_args[]);

   printf ("\n\n[Hard fault handler - all numbers in hex]\r\n");

   printf ("R0 = %x\r\n", stacked_r0);

   printf ("R1 = %x\r\n", stacked_r1);

   printf ("R2 = %x\r\n", stacked_r2);

   printf ("R3 = %x\r\n", stacked_r3);

   printf ("R12 = %x\r\n", stacked_r12);

   printf ("LR [R14] = %x  subroutine call return address\r\n", stacked_lr);

   printf ("PC [R15] = %x  program counter\r\n", stacked_pc);

   printf ("PSR = %x\r\n", stacked_psr);

   printf ("BFAR = %x\r\n", (*((volatile unsigned long *)(0xE000ED38))));

   printf ("CFSR = %x\r\n", (*((volatile unsigned long *)(0xE000ED28))));

   printf ("HFSR = %x\r\n", (*((volatile unsigned long *)(0xE000ED2C))));

   printf ("DFSR = %x\r\n", (*((volatile unsigned long *)(0xE000ED30))));

   printf ("AFSR = %x\r\n", (*((volatile unsigned long *)(0xE000ED3C))));

   printf ("SCB_SHCSR = %x\r\n", SCB->SHCSR);

   while ();

 } 

HardFault_Handler_C

 [Hard fault handler - all numbers in hex]

 R0 =

 R1 =

 R2 =

 R3 = c0

 R12 =

 LR [R14] =   subroutine call return address

 PC [R15] =   program counter

 PSR =

 BFAR =

 CFSR =

 HFSR =

 DFSR =

 AFSR =

 SCB_SHCSR = 

对于调试很有帮助的，注意PC[R15]的数值是我们需要的