struct2json 串口打印json内容6次后就出异常

发布于 2019-06-29 13:57:18 浏览：1980 订阅该版

2 个回答

pc8052 2019-06-29

这家伙很懒，什么也没写！

这是相关程序

```
int s2jmain(void) {
    static Student orignal_student_obj = {
            .id = 24,
            .weight = 71.2,
            .score = {1, 2, 3, 4, 5, 6, 7, 8},
            .name = "armink",
            .hometown.name = "China",
						
    };
   
    rt_size_t i,j;
		
    /* serialize Student structure object */
    cJSON *json_student = struct_to_json(&orignal_student_obj);
		
   
		s2jstr=cJSON_PrintUnformatted(json_student);//json 转为类似字符串形式输出
			j=rt_strlen(s2jstr);//打印6次左右后,长度 j 由98变成2.
		
		rt_memcpy(s2j_json_buff,s2jstr,j);
			for(i=0;i<j;i++)
			rt_kprintf("%c",*(s2j_json_buff+i)); //打印6次左右，以后就不再打印
		
    usart2_dma_output((char*)s2j_json_buff,100);//打印6次后，以后都是0
		rt_memset(s2j_json_buff,0,100);
		
    /* deserialize Student structure object */
    Student *converted_student_obj = json_to_struct(json_student);
				
		
    /* compare Student structure object */
    if(memcmp(&orignal_student_obj, converted_student_obj, sizeof(Student))) {
        rt_kprintf("Converted failed!\n");
    } else {
			rt_kprintf("Converted OK! \n"); //一直会打印
			
    }
		   
		
    s2j_delete_json_obj(json_student);
    s2j_delete_struct_obj(converted_student_obj);

return 0;
}
```