本例程为中断服务程序收发定长数据。

1 中断服务程序

void UART2_IRQHandler(void)
{
    UART_TypeDef* UARTx = UART2;
    u8 temp;

// Receive packet
    if (UART_GetITStatus(UARTx, UART_IT_RXIEN) != RESET) {
        UART_ClearITPendingBit(UARTx, UART_IT_RXIEN);
        temp = UART_ReceiveData(UARTx);
        vtemp[vNo++] = temp;

        if ((vUART2RxProcess.Cnt) > 0) {
            *(u8*)(vUART2RxProcess.Ptr) = temp;
            vUART2RxProcess.Ptr++;
            vUART2RxProcess.Cnt--;
            if ((vUART2RxProcess.Cnt) == 0) {
                vUART2RxProcess.Complete = TRUE;
                UART_ITConfig(UARTx, UART_IT_RXIEN, DISABLE);
//                if (vUART2RxProcess.sync == emType_Sync) {
//                    funcptr fun = (funcptr)(vUART2RxProcess.syncRx);
//                   (*fun)();
//                }
            }

        }

    }
// Send packet
    if (UART_GetITStatus(UARTx, UART_IT_TXIEN) != RESET) {
        UART_ClearITPendingBit(UARTx, UART_IT_TXIEN);

        if (vUART2TxProcess.Cnt > 0) {
            UART_SendData(UARTx, *(u8*)(vUART2TxProcess.Ptr));
            vUART2TxProcess.Ptr++;
            vUART2TxProcess.Cnt--;
        } else {
            UART_ITConfig(UARTx, UART_IT_TXIEN, DISABLE);
            while (!UART_GetFlagStatus(UARTx, UART_CSR_TXC));
            vUART2TxProcess.Complete = TRUE;
//          if (vUART2TxProcess.sync == emType_Sync) {
//              funcptr fun = (funcptr)(vUART2TxProcess.syncfun);
//             (*fun)();
//          }
        }

    }
}

2 main主程序流程

int main(void)
{
    int ret;
    InitSystick();

    Uart_ConfigInit(9600);
//    UART2_WriteBuf((u8*)printBuf, sprintf(printBuf,"sprintf ok\r\n"));
    UartSendGroup((u8*)printBuf, sprintf(printBuf, "sprintf ok\r\n"));          //pintf stdio data
    UartSendAscii("UartSendAscii\r\n");                                         //printf string
    UartSendAscii("Please input data ,end with '\\n' \r\n");

    while(1) {
        // delay(1000);

        ret = UART2_ReadBuf(RxBuf, 10);
        if(ret == 1) {
            memcpy(TxBuf, RxBuf, 10);
            UART2_WriteBuf(TxBuf, 10);
        }
    }

}

官方例程的修正已基本完成，需要程序的同学可以到百度网盘下载。
提取码：0o5i