菜鸟求助——串口通信

只看该作者 · 2012-7-19 10:32

本帖最后由云帆沧海于 2012-7-19 10:36 编辑

首先说明函数功能：
通过中断实现串口通信，首先由PC向stm32发送数据，然后再将收到的数据由stm32传回PC机,通过下面函数为什么不能实现？望指点
主函数：
#include "stm32f10x_lib.h"
#include "platform_config.h"
void RCC_Configuration(void);    //时钟使能
void GPIO_Configuration(void);    //GPIO使能
void NVIC_Configuration(void);    //中断使能
USART_InitTypeDef USART_InitStructure;

int main(void)
{
  RCC_Configuration();
  NVIC_Configuration();
  GPIO_Configuration();

  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_Rx | USART_Mode_Tx;
  USART_Init(USART1, &USART_InitStructure);
  USART_ITConfig(USART1, USART_IT_TXE|USART_IT_RXNE, ENABLE);
  USART_Cmd(USART1, ENABLE);
  while (1)
  {
  }
}
void RCC_Configuration(void)
{
  /*使能串口1使用的GPIO时钟*/
  RCC_APB2PeriphClockCmd(USART1_GPIO_CLK, ENABLE);
  /*使能串口1时钟*/
  RCC_APB2PeriphClockCmd(USART1_CLK, ENABLE);
}
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  /*串口1 TX管脚配置*/
  GPIO_InitStructure.GPIO_Pin = USART1_TxPin;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(USART1_GPIO, &GPIO_InitStructure);
  /*串口1 RX管脚配置*/
  GPIO_InitStructure.GPIO_Pin = USART1_RxPin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(USART1_GPIO, &GPIO_InitStructure);
}
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;                               //抢占式中断优先级设置为0
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;                                     //响应式中断优先级设置为0
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

中断函数：
#include "stm32f10x_it.h"
#define RxBufferSize 0xfe
u8 RxBuffer[RxBufferSize];
u16 RxCounter = 0;
int i=0;
void receive_data(void) ;                                                 //声明接收发送函数
void send_data(void)  ;
void USART1_IRQHandler(void)                            //中断主函数
{
  while(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)                //检查串口1的接收中断
{
receive_data();
}
  while(USART_GetITStatus(USART1, USART_IT_TXE) != RESET)
{
send_data() ;
}
USART_ITConfig(USART1, USART_IT_TXE|USART_IT_RXNE, ENABLE);          //使能中断
}

void receive_data(void)                               //接收函数
   {
      RxBuffer[RxCounter++] = USART_ReceiveData(USART1);                //接收数据
   if(RxCounter<0xfe||'\n'==RxBuffer[RxCounter])
   {
   USART_ITConfig(USART1, USART_IT_RXNE, DISABLE);    //失能接收中断
}
   }
void send_data(void)                                           //发送函数
{
   if(i<RxCounter)
   USART_SendData(USART1, RxBuffer[i++]);
// USART_ITConfig(USART1, USART_IT_TXE, DISABLE);
USART_ClearITPendingBit(USART1, USART_IT_TXE);
}


PS：本人使用的开发板为神舟三号，芯片类型STM32F103ZE