ch32v103串口3中断接收一直收不到怎么处理？

/*
*@Note
USART中断例程：
Master：USART2_Tx(PA2)、USART2_Rx(PA3)。
Slave：USART3_Tx(PB10)、USART3_Rx(PB11)。


本例程演示 UART2 和 USART3 使用查询发送，中断接收。
注：
     硬件连线：PA2 —— PB11
               PA3 —— PB10


*/


//#include "debug.h"
#include "ch32v10x.h"
/* Global define */
#define TxSize1    (size(TxBuffer1))
#define TxSize2    (size(TxBuffer2))
#define size(a)    (sizeof(a) / sizeof(*(a)))


/* Global typedef */
typedef enum
{
    FAILED = 0,
    PASSED = !FAILED
} TestStatus;


/* Global Variable */
u8 TxBuffer1[] = "*Buffer1 Send from USART2 to USART3 using Interrupt!"; /* Send by UART2 */
u8 TxBuffer2[] = "#Buffer2 Send from USART3 to USART2 using Interrupt!"; /* Send by UART3 */
u8 RxBuffer1[TxSize1] = {0};                                             /* USART2 Using */
u8 RxBuffer2[10] = {0};                                             /* USART3 Using  */


u8 TxCnt1 = 0, RxCnt1 = 0;
u8 TxCnt2 = 0, RxCnt2 = 0;


u8 Rxfinish2 = 0;


TestStatus TransferStatus1 = FAILED;
TestStatus TransferStatus2 = FAILED;




void USART3_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));


/*********************************************************************
* @fn      Buffercmp
*
* @brief   Compares two buffers
*
* @param   Buf1,Buf2 - buffers to be compared
*          BufferLength - buffer's length
*
* @return  PASSED - Buf1 identical to Buf
*          FAILED - Buf1 differs from Buf2
*/
TestStatus Buffercmp(uint8_t *Buf1, uint8_t *Buf2, uint16_t BufLength)
{
    while(BufLength--)
    {
        if(*Buf1 != *Buf2)
        {
            return FAILED;
        }
        Buf1++;
        Buf2++;
    }
    return PASSED;
}


/*********************************************************************
* @fn      USARTx_CFG
*
* @brief   Initializes the USART2 & USART3 peripheral.
*
* @return  none
*/
void USARTx_CFG(void)
{
    GPIO_InitTypeDef  GPIO_InitStructure = {0};
    USART_InitTypeDef USART_InitStructure = {0};
    NVIC_InitTypeDef  NVIC_InitStructure = {0};


    RCC_APB2PeriphClockCmd(  RCC_APB2Periph_GPIOB, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);




    /* USART3 TX-->B.10  RX-->B.11 */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOB, &GPIO_InitStructure);


    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;


    USART_Init(USART3, &USART_InitStructure);
    USART3->STATR = 0x00C0;
    USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);


    NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);


    USART_Cmd(USART3, ENABLE);
}
void usart_send(u8 *ch)
{
while(*ch)
    {
        USART_SendData(USART3,*ch++) ;
         while (USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET);
    }
}


/*********************************************************************
* @fn      main
*
* @brief   Main program.
*
* @return  none
*/
int main(void)
{
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
    Delay_Init();
   // USART_Printf_Init(115200);
   //printf("SystemClk:%drn", SystemCoreClock);


    //printf("33333333 Interrupt TESTrn");
    USARTx_CFG(); /* USART2 & USART3 INIT */
    Delay_Ms(100);


    while(1){
         usart_send(RxBuffer2);
        Delay_Ms(1000);
        if(Rxfinish2==1)
    {
            Rxfinish2=0;
            usart_send("0");


           // USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);


    }
}
}
/*********************************************************************
* @fn      USART3_IRQHandler
*
* @brief   This function handles USART3 global interrupt request.
*
* @return  none
*/
void USART3_IRQHandler(void)
{
    if(USART_GetITStatus(USART3, USART_IT_RXNE) !=RESET)
    {
        RxBuffer2[RxCnt2++] = USART_ReceiveData(USART3);
        if(RxCnt2 >10)
       {Rxfinish2 = 1;
           // USART_ClearITPendingBit(USART3, USART_IT_RXNE);
         //  USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);
       RxCnt2=0;
       }
    }
}
各位大哥看看这到底那个标志位不对，发送没问题，一直接收不到，完全调不通，Rxfinish2一直等于1，也就是说就算没接收也是一直进接收中断，感觉向外发送字节也引发了USART_IT_RXEN中断。串口助手发给103的根本收不到，RxBuffer2里面啥都没有。