stm32使用jlink进行hardfault定位的方法

您可以按照以下步骤使用J-Link进行STM32的HardFault定位：

1. 首先，在代码中添加HardFault异常处理函数，并通过操作寄存器将其地址存储在VTOR寄存器的第29位和第30位中。代码示例：

void HardFault_Handler(void)
{
   __asm volatile (
      " tst lr, #4 \n"
      " ite eq \n"
      " mrseq r0, msp \n"
      " mrsne r0, psp \n"
      " ldr r1, [r0, #24] \n"
      " ldr r2, handler2_address_const \n"
      " bx r2 \n"
      " handler2_address_const: .word HardFault_Handler2 \n"
   );
}

void HardFault_Handler2(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[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 ("[HardFault]\n");
   printf ("- Stack frame:\n");
   printf (" R0 = 0x%08x\n", stacked_r0);
   printf (" R1 = 0x%08x\n", stacked_r1);
   printf (" R2 = 0x%08x\n", stacked_r2);
   printf (" R3 = 0x%08x\n", stacked_r3);
   printf (" R12 = 0x%08x\n", stacked_r12);
   printf (" LR [R14] = 0x%08x subroutine call return address\n", stacked_lr);
   printf (" PC [R15] = 0x%08x program counter\n", stacked_pc);
   printf (" PSR = 0x%08x\n", stacked_psr);

   while (1);
}

2. 然后，打开J-Link GDB服务器，并连接到目标设备。代码示例：

$ JLinkGDBServer -device STM32F103ZE -if SWD

3. 通过GDB连接到J-Link服务器并加载程序文件。代码示例：

$ arm-none-eabi-gdb -ex "target remote localhost:2331" firmware.elf

4. 在GDB中设置读取HardFault异常原因的断点。代码示例：

(gdb) target remote localhost:2331
(gdb) break HardFault_Handler
(gdb) continue

5. 当程序触发HardFault异常时，程序将停止在HardFault异常处理函数中的断点处。您可以使用GDB检查寄存器的值，以及输出您在HardFault异常处理函数中添加的调试信息。代码示例：

[HardFault]
- Stack frame:
 R0 = 0x00000000
 R1 = 0x200048c4
 R2 = 0x00000012
 R3 = 0xffffffff
 R12 = 0x00000000
 LR [R14] = 0x080034b9 subroutine call return address
 PC [R15] = 0x08002ccb program counter
 PSR = 0x81000000

以上是使用J-Link进行STM32的HardFault定位的方法。希望能对您有所帮助。