rt_hw_context_switch_to之后进入硬件错误中断该怎么办？

发布于 2024-10-14 09:35:32 浏览：464 订阅该版

通过STM32CUBEMX生成的基于STM32CUBEIDE的RT-THREAD程序，在完成rt_hw_context_switch_to之后进入如下程序

```c

HardFault_Handler:
    /* get current context */
    MRS     r0, msp                 /* get fault context from handler. */
    TST     lr, #0x04               /* if(!EXC_RETURN[2]) */
    BEQ     _get_sp_done
    MRS     r0, psp                 /* get fault context from thread. */
_get_sp_done:

STMFD   r0!, {r4 - r11}         /* push r4 - r11 register */
    STMFD   r0!, {lr}               /* push exec_return register */

TST     lr, #0x04               /* if(!EXC_RETURN[2]) */
    BEQ     _update_msp
    MSR     psp, r0                 /* update stack pointer to PSP. */
    B       _update_done
_update_msp:
    MSR     msp, r0                 /* update stack pointer to MSP. */
_update_done:

PUSH    {LR}
    BL      rt_hw_hard_fault_exception
    POP     {LR}

ORR     LR, LR, #0x04
    BX      LR

```
当进入到rt_hw_hard_fault_exception里

```c
void rt_hw_hard_fault_exception(struct exception_info * exception_info)
{
    extern long list_thread(void);
    struct stack_frame* context = &exception_info->stack_frame;

if (rt_exception_hook != RT_NULL)
    {
        rt_err_t result;

result = rt_exception_hook(exception_info);
        if (result == RT_EOK)
            return;
    }

rt_kprintf("psr: 0x%08x\n", context->exception_stack_frame.psr);

rt_kprintf("r00: 0x%08x\n", context->exception_stack_frame.r0);
    rt_kprintf("r01: 0x%08x\n", context->exception_stack_frame.r1);
    rt_kprintf("r02: 0x%08x\n", context->exception_stack_frame.r2);
    rt_kprintf("r03: 0x%08x\n", context->exception_stack_frame.r3);
    rt_kprintf("r04: 0x%08x\n", context->r4);
    rt_kprintf("r05: 0x%08x\n", context->r5);
    rt_kprintf("r06: 0x%08x\n", context->r6);
    rt_kprintf("r07: 0x%08x\n", context->r7);
    rt_kprintf("r08: 0x%08x\n", context->r8);
    rt_kprintf("r09: 0x%08x\n", context->r9);
    rt_kprintf("r10: 0x%08x\n", context->r10);
    rt_kprintf("r11: 0x%08x\n", context->r11);
    rt_kprintf("r12: 0x%08x\n", context->exception_stack_frame.r12);
    rt_kprintf(" lr: 0x%08x\n", context->exception_stack_frame.lr);
    rt_kprintf(" pc: 0x%08x\n", context->exception_stack_frame.pc);

if(exception_info->exc_return & (1 << 2) )
    {
        rt_kprintf("hard fault on thread: %s\r\n\r\n", rt_thread_self()->name);

#ifdef RT_USING_FINSH
        list_thread();
#endif /* RT_USING_FINSH */
    }
    else
    {
        rt_kprintf("hard fault on handler\r\n\r\n");
    }

#ifdef RT_USING_FINSH
    hard_fault_track();
#endif /* RT_USING_FINSH */

while (1);
}
```

因为 `rt_exception_hook ==RT_NULL`  导致进入死循环 请问大家该怎么解决呢  谢谢 在线等！