硬故障处理-Arm Cortex-M0

Question

我在为具有ARM CortexM0的NRF51创建硬故障处理程序时遇到了一些困难。

（注意：以下代码是从互联网上的不同来源合并而成的）到目前为止，这是我得到的：

    static 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[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]);

    for(;;);
}

void HardFault_Handler(void)
{
    asm volatile(  
        "movs r0, #4\t\n"  
        "mov  r1, lr\t\n"  
        "tst  r0, r1\t\n" /* Check EXC_RETURN[2] */  
        "beq 1f\t\n"  
        "mrs r0, psp\t\n"  
        "ldr r1,=hard_fault_handler_c\t\n"  
        "bx r1\t\n"  
        "1:mrs r0,msp\t\n"  
        "ldr r1,=hard_fault_handler_c\t\n"  
        : /* no output */  
        : /* no input */  
        : "r0" /* clobber */  
    );  
}

编译期间的错误如下：生成目标：project.elf调用：跨ARM C ++链接器C：\\ Users \\ Steven \\ AppData \\ Local \\ Temp \\ ccuAgDyP.ltrans9.ltrans.o：在函数HardFault_Handler': <artificial>:(.text.HardFault_Handler+0x18): undefined reference to hard_fault_handler_c'collect2.exe的引用：错误：ld返回1退出状态make：*** [FruityMesh.elf]错误1 makefile：65：目标'project.elf'的配方失败

总而言之，链接器似乎无法找到hard_fault_handler_c函数的地址。 我认为我需要编写汇编程序来导入或包含此函数的路径，但这只是我的建议。 我无法为编译后的M0编写程序集。

谢谢

Answer 1

我建议升级到NRF SDK 版本11 ，该版本增加了对硬故障处理程序的内置支持（请参阅nRF5_SDK_11.0.0_89a8197 / components / libraries / hardfault）。