RT——Thread 疑问

1万 · 2018-10-24 19:16

本帖最后由一路向北lm 于 2018-10-24 19:23 编辑

看火哥的书目前第六章已经快完了，这里有几个疑惑？1.汇编文件context_rvds.S中需要导入rt_hw_hard_fault_exception函数，目前这个函数还没有写，现在汇编文件中将其注释。

仿真出来的波形如下：

不知道这样会有什么影响吗？

1万 · 2018-10-24 19:25

打开了火哥移植好的测试程序，在rthw.h文件中找到了rt_hw_hard_fault_exception 函数定义如下：

复制

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);

}