新人又来了，这次是关于串口中断的。

楼下的房东 · 发表于 2013-7-16 16:32:24

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_usart.h"

void GPIO_Initialization()
{
    GPIO_InitTypeDef GPIO_InitStructure; //从GPIO_InitTypeDef 开始找,还要加上GPIO_Init
    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA,&GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA,&GPIO_InitStructure);
}

void USART_Interrupt()
{
    #if EN_USART1_RX        //如果使能了接收
   //Usart1 NVIC 配置
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;        //子优先级3
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;            //IRQ通道使能
    NVIC_Init(&NVIC_InitStructure);    //根据指定的参数初始化VIC寄存器
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //开启接收中断
    USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
    #endif
    USART_Cmd(USART1, ENABLE);

}

void RCC_Initialization()

{

    SystemInit();

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1, ENABLE ); //或标志，启动了GPIO B和E的时钟。控制GPIO口
                                                                                   //先要初始化GPIO口和RCC（时钟）

}

void USART_Initialization()
{
    USART_InitTypeDef USART_InitStructure;

    USART_InitStructure.USART_BaudRate=9600;
    USART_InitStructure.USART_WordLength=USART_WordLength_8b;
    USART_InitStructure.USART_StopBits=USART_StopBits_1;
    USART_InitStructure.USART_Parity=USART_Parity_No;
    USART_InitStructure.USART_Mode=USART_Mode_Rx | USART_Mode_Tx;
    USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
    USART_Init(USART1, &USART_InitStructure);

}

void USART_Reset()
{
    USART_DeInit(USART1);
}

void Delay(vu32 n)
{
    for(;n!=0;n--);
}

int main()
{

    RCC_Initialization();
    USART_Reset();
    GPIO_Initialization();
    USART_Initialization();
    USART_Interrupt();
    while(1)
        {
            if(USART_GetITStatus(USART1, USART_IT_RXNE)!= RESET)
            {
                u8 res;
                res=USART_ReceiveData(USART1);
                USART_SendData(USART1,res);
                Delay(50);
            }
        }
}

又是按着实验改了，本来不加和中断相关的语句。能写能读，但是一直在读数据。加了和中断相关的语句以后，写完数据，读不出来。。。串口助手R一直为0，这什么情况。