HARD FAULT 错误点在UXTB r1，r0

发布于 2015-06-02 17:36:50 浏览：2492 订阅该版

线程运行后，进入while ，delay挂起。然后就出现了硬件错误，求大家帮忙解答下，多谢了。
下面是打印的信息。
![3.jpg](/uploads/7452_95907121ca3c743861ef72d5fa6ccf83.jpg)

查看keil，发现pc=0x00000848指向命令UXTB  r1，r0。
![4.jpg](/uploads/7452_9a49027c02f38a7206d26c95a4a9ef22.jpg)

可能出现问题的函数，此函数在while之前成功执行：
```static void hmi_write(Hmi_Text_Type *p,void* parameter)
{
		if(p->show_type&HMI_SHOW_TYPE_REWRITE)
		{
			  rt_uint8_t hmi_rewrite_buf[]={0xAA,0x71,0x0B,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xCC,0x33,0xC3,0x3C};
				hmi_rewrite_buf[3]=*((rt_uint8_t *)(&p->x1)+1);
				hmi_rewrite_buf[4]=*((rt_uint8_t *)(&p->x1));
				hmi_rewrite_buf[5]=*((rt_uint8_t *)(&p->y1)+1);
				hmi_rewrite_buf[6]=*((rt_uint8_t *)(&p->y1));
				hmi_rewrite_buf[7]=*((rt_uint8_t *)(&p->x2)+1);
				hmi_rewrite_buf[8]=*((rt_uint8_t *)(&p->x2));
				hmi_rewrite_buf[9]=*((rt_uint8_t *)(&p->y2)+1);
				hmi_rewrite_buf[10]=*((rt_uint8_t *)(&p->y2));				
				hmi_rewrite_buf[11]=*((rt_uint8_t *)(&p->x3)+1);
				hmi_rewrite_buf[12]=*((rt_uint8_t *)(&p->x3));
				hmi_rewrite_buf[13]=*((rt_uint8_t *)(&p->y3)+1);
				hmi_rewrite_buf[14]=*((rt_uint8_t *)(&p->y3));	
       	rt_device_write(dev,0,hmi_rewrite_buf,sizeof(hmi_rewrite_buf));			
		}
		switch(p->data_type)
		{
			  case HMI_DATA_TYPE_FLOAT:
				{
					  char str[8],str_size;
					  float par;
					  par=*(float*)parameter;
					  str_size=sprintf(str,"%.2f",par);
		        rt_uint8_t hmi_write_buf1[]={0xAA,0x98,0x00,0x00,0x00,0x00,0x00,0x81,0x05,0x00,0x00,0x00,0x00};
						rt_uint8_t hmi_write_buf2[]={0xCC,0x33,0xC3,0x3C};
						hmi_write_buf1[2]=*((rt_uint8_t *)(&p->x0)+1);
						hmi_write_buf1[3]=*((rt_uint8_t *)(&p->x0));
						hmi_write_buf1[4]=*((rt_uint8_t *)(&p->y0)+1);
						hmi_write_buf1[5]=*((rt_uint8_t *)(&p->y0));						
						hmi_write_buf1[8]=p->size;
						hmi_write_buf1[9]=*((rt_uint8_t *)(&p->color)+1);
						hmi_write_buf1[10]=*((rt_uint8_t *)(&p->color));												
		        rt_device_write(dev,0,hmi_write_buf1,sizeof(hmi_write_buf1));
						rt_device_write(dev,0,str,str_size);
						rt_device_write(dev,0,hmi_write_buf2,4);
				}
			  break;	
				default:
        break;				
		}
	  
}```