STM32 無中斷串口代碼

1、串口初始化函數(shù)：void USART_Ini(USART_TypeDef* USARTx,u16 buad)

2、串口中斷開啟和關(guān)閉：USART_IT(USART_TypeDef* USARTx,FunctionalState NewState)

3、串口接收：u16 Getch(USART_TypeDef* USARTx)

4、串口單個字符輸出：void Putch(USART_TypeDef* USARTx,u16 ch)

5、串口輸出字符串：void PutStr(USART_TypeDef* USARTx,u16 *SendBuf,u16 Length)

#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; //串口數(shù)據(jù)長度
USART_InitStructure.USART_StopBits = USART_StopBits_1; //串口停止位
USART_InitStructure.USART_Parity = USART_Parity_No; //串口奇偶效驗位
USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx; //串口模式，開始起發(fā)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); //開啟串口X
}
/*******************************************************************************
* Function Name : Getch
* Description : 串口中斷開啟或關(guān)閉
* Input : USARTx：x=串口號
NewState： ENABLE開啟中斷，DISABLE關(guān)閉中斷
* 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=串口號
* 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 : GetStr
* Description : 接收字符串
* Input : USARTx：x=串口號
buffer：接收字符串?dāng)?shù)組
* 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<100)
{
RecDateBuffer[RecLen]=USART_ReceiveData(USARTx);
RecLen++;
}
}
}

}
/*******************************************************************************
* Function Name : Putch
* Description : 串口輸出一個字符
* Input : USARTx：x=串口號
ch：串口輸出的字符
* Output : None
* Return :
*******************************************************************************/
void Putch(USART_TypeDef* USARTx,u16 ch)
{
if(USART_GetFlagStatus(USARTx,USART_FLAG_TXE)==SET)
{
USART_SendData(USARTx,ch);
}
}
/*******************************************************************************
* Function Name : PutStr
* Description : 串口輸出字符串
* Input : USARTx：x=串口號
SendBuf：串口輸出字符串
Length:輸出長度
* Output : None
* Return :
*******************************************************************************/
void PutStr(USART_TypeDef* USARTx,u16 *SendBuf,u16 Length)
{
u16 i;

for(i=0;i
{
Putch(USARTx,SendBuf[i]);
}
}