STM32 串口配置

废鱼提问时间：2010-4-21 13:46 /

#include "stm32f10x_lib.h"
u16 RecDateBuffer[100];
u16 RecLen;
u8 SendDateBuffer[100];
/*******************************************************************************
* Function Name : Uart_Ini
* Description    : 串口初始化
* Input          :
* Output         : None
* Return         :
*******************************************************************************/
void USART_Ini(USART_TypeDef* USARTx,u16 buad)
{
   USART_InitTypeDef USART_InitStructure;
   USART_ClockInitTypeDef USART_ClockIni;
   GPIO_InitTypeDef GPIO_InitStructure;
   /* Configure USART1 Tx (PA.09) as alternate function push-pull */
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(GPIOD, &GPIO_InitStructure);

   /* Configure USART1 Rx (PA.10) as input floating */
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
   GPIO_Init(GPIOD, &GPIO_InitStructure);
   USART_InitStructure.USART_BaudRate = 9600;      //串口波特率
   USART_InitStructure.USART_WordLength = USART_WordLength_8b; //串口数据长度
   USART_InitStructure.USART_StopBits = USART_StopBits_1;   //串口停止位
   USART_InitStructure.USART_Parity = USART_Parity_No;    //串口奇偶效验位
   USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx; //串口模式，开始起发送和接收
   USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //串口硬件流
   USART_ClockIni.USART_Clock = USART_Clock_Disable;
   USART_ClockIni.USART_CPOL = USART_CPOL_Low;
   USART_ClockIni.USART_CPHA = USART_CPHA_2Edge;
   USART_ClockIni.USART_LastBit = USART_LastBit_Disable;

   USART_Init(USARTx,&USART_InitStructure);
   USART_ClockInit(USARTx,&USART_ClockIni);
   /* Enable USART1 */
USART_Cmd(USARTx, ENABLE); //开启串口X
}
/*******************************************************************************
* Function Name : Getch
* Description    : 串口中断开启或关闭
* Input          : USARTx：x=串口号
                   NewState： ENABLE开启中断，DISABLE关闭中断
* Output         : None
* Return         :
*******************************************************************************/
void USART_IT(USART_TypeDef* USARTx,FunctionalState NewState)
{
    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 5;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

   if(NewState==ENABLE)
   {
     USART_ITConfig(USARTx,USART_IT_RXNE | USART_IT_TXE,ENABLE);
   }
   else
   {
     USART_ITConfig(USARTx,USART_IT_RXNE | USART_IT_TXE,DISABLE);
   }
}
/*******************************************************************************
* Function Name : Getch
* Description    : 串口接收字符
* Input          : USARTx：x=串口号
* Output         : None
* Return         :
*******************************************************************************/
u16 Getch(USART_TypeDef* USARTx)
{
   u16 ch;
   if (USART_GetFlagStatus(USARTx,USART_FLAG_RXNE)==SET)
   {
     ch=USART_ReceiveData(USARTx);
//return(ch);
   }
   return(ch);
}
/*******************************************************************************
* Function Name : Uart_Ini
* Description    : 接收字符串
* Input          : USARTx：x=串口号
       buffer：接收字符串数组
* Output         : None
* Return         :
*******************************************************************************/
void GetStr(USART_TypeDef* USARTx)
{
    //u16 i;
while(USART_GetFlagStatus(USARTx,USART_FLAG_RXNE)==SET)
{
   if(USART_GetFlagStatus(USARTx,USART_FLAG_ORE)==RESET)
   {
      if(RecLen