为什么消息队列的存储的数据只能以有符号数据打印

发布于 2018-11-19 21:38:22 浏览：1775 订阅该版

//线程一
static void receive_thread_entry(void* parameter)
{
    rt_err_t uwRet = RT_EOK;
    uint32_t r_queue;

while (1)
    {

uwRet = rt_mq_recv(test_mq,	
                           &r_queue,			
                           sizeof(r_queue),		
                           RT_WAITING_FOREVER); 	
        if(RT_EOK == uwRet)
        {
            rt_kprintf("%d<br>",r_queue);
        }
        else
        {
            rt_kprintf(" 0x%lx<br>",uwRet);
        }
        rt_thread_delay(200);
    }
}
//线程二
static void send_thread_entry(void* parameter)
{
    rt_err_t uwRet = RT_EOK;
    uint32_t send_data1 = 2147483644;
    uint32_t send_data2 = 2;

while (1)
    {
        if( Key_Scan(KEY1_GPIO_PORT,KEY1_GPIO_PIN) == KEY_ON )
        {
            send_data1++;

uwRet = rt_mq_send(	test_mq,
                                &send_data1,			
                                sizeof(send_data1));			
            if(RT_EOK != uwRet)
            {
                rt_kprintf("%lx<br>",uwRet);
            }
        }
        if( Key_Scan(KEY2_GPIO_PORT,KEY2_GPIO_PIN) == KEY_ON )
        {

uwRet = rt_mq_send(	test_mq,	
                                &send_data2,			
                                sizeof(send_data2));			
            if(RT_EOK != uwRet)
            {
                rt_kprintf(" %lx<br>",uwRet);
            }
        }
        rt_thread_delay(20);
    }
}
此实验程序改自官方例程【基于野火F103 【霸道】开发板】---->【18，消息队列】
问题出现在于U32的send_data1（typedef unsigned  int uint32_t;）最大只能显示一半，实验截图如附件

![2.jpg](https://oss-club.rt-thread.org/uploads/201811/19/213655b6k6jpkopzz96p9m.jpg)