STM32F407 4.1.0版本串口接收不到数据是怎么一回事

采用串口1，连接迪文屏，把调试的console关了，采用rxint方式接收，

调试过程中，发现点击屏幕，串口接收不到数据，我在串口接收中断里打的断点。请大家帮忙看看，谢谢

这是串口接收中断服务函数，我在第一行打断点都不会停

void USART1_IRQHandler(void)

{

/* enter interrupt */

rt_interrupt_enter();

// uart_isr(&(uart_obj[UART1_INDEX].serial));

uint8_t res;    

if(USART1->SR&(1<<5))//接收到数据

{     

    res=USART1->DR;

    //USART6->DR=res;

    if((USART_RX_STA&0x8000)==0)//接收未完成

    {        

        if(USART_RX_STA==0)

        {

            //接收数据个数为0时，刚开始接收，此时如果收到帧头0x5A，保存，数字++

                if(res==0x5a)USART_RX_BUF[USART_RX_STA++]=res;

        }

        else if(USART_RX_STA==1)

        {

            //个数1，如果收到0xA5，帧头第二部分，保存，个数++

                if(res==0xa5)USART_RX_BUF[USART_RX_STA++]=res;

            //如果又收到帧头一，则相当于收到1个数据，赋值给buf[0]

                else if(res==0x5a)USART_RX_BUF[0]=res;

            //不是帧头1，也不是帧头2，这一帧错误，sta=0，重新接收

                else USART_RX_STA=0;

        }

        else if(USART_RX_STA==2)

        {

            //接收完帧头之后，是数据长度，长度小于5大于30，重新接收，反之接收长度数据

                if((res<=5)||(res>30))USART_RX_STA=0;

                else USART_RX_BUF[USART_RX_STA++]=res;

            }

        else 

        {

            //正常接收数据，接收数据长度大于上面的长度+2，就是等于+3，包括了2个帧头和数据长度，完成接收

                USART_RX_BUF[USART_RX_STA++]=res;

                if(USART_RX_STA>(USART_RX_BUF[2]+2))

                    USART_RX_STA|=0x8000;    //接收完成

        }

    }

} 

/* leave interrupt */

rt_interrupt_leave();

}

if (dev == RT_NULL)

{

    dev = rt_device_find(Screen_DEVICE_NAME);

    RT_ASSERT(dev);

    if(RT_EOK ==rt_device_open(dev, RT_DEVICE_FLAG_INT_RX))

    {

        rt_kprintf("Screen serial open success.\r\n");

// return RT_EOK;

}

    else

    {

        rt_kprintf("Screen serial open failure.\r\n");

        return RT_ERROR;

    }

    pconfig.baud_rate = BAUD_RATE_115200;

    pconfig.data_bits = DATA_BITS_8;

    pconfig.stop_bits = STOP_BITS_1;

    pconfig.parity    = PARITY_NONE;

    pconfig.bit_order = BIT_ORDER_LSB;

    pconfig.invert    = NRZ_NORMAL;

    pconfig.bufsz     = 256;

    pconfig.reserved  = 0;

    /* 设置串口参数 */

    rt_device_control(dev, RT_DEVICE_CTRL_CONFIG, &pconfig);

    /*设置串口的回调函数 */

    rt_device_set_rx_indicate(dev, RT_NULL);

}

还有把控制台关了

#define RT_USING_DEVICE

//#define RT_USING_CONSOLE

#define RT_CONSOLEBUF_SIZE 128

#define RT_CONSOLE_DEVICE_NAME "uart1"

#define RT_VER_NUM 0x40100

#define ARCH_ARM

#define RT_USING_CPU_FFS

#define ARCH_ARM_CORTEX_M

#define ARCH_ARM_CORTEX_M4

多谢