STM32 Uart串口中断响应、发送接收详细程序

程序实现功能：可以直接接收USART1的数据，并通过串口调试输出显示

#include"stm32f10x_lib.h"

void NVIC_Configuration(void);

void RCC_Configuration(void);

void GPIO_Configuration(void);

ErrorStatus HSEStartUpStatus;

USART_InitTypeDef USART_InitStructure;

USART_ClockInitTypeDef USART_ClockInitStructure;

int main()

{

#ifdef DEBUG

debug

#endif

RCC_Configuration();

NVIC_Configuration();

GPIO_Configuration();

/*串口传输速率的大小必须与RCC所设定的时钟相对应起来*/

USART_https://www.wendangku.net/doc/6c3067849.html,ART_BaudRate = 9600; //设置USART的传输速率/*设定数据的接收发送模式*/

USART_https://www.wendangku.net/doc/6c3067849.html,ART_WordLength = USART_WordLength_8b;//在一帧中传输或接受8位数据位

USART_https://www.wendangku.net/doc/6c3067849.html,ART_StopBits = USART_StopBits_1; //定义在帧的结尾传输一个停止位

USART_https://www.wendangku.net/doc/6c3067849.html,ART_Parity = USART_Parity_No; //奇偶失能

USART_https://www.wendangku.net/doc/6c3067849.html,ART_HardwareFlowControl = USART_HardwareFlowControl_None; //指定硬件流控制模式RTS和CTS使能

USART_https://www.wendangku.net/doc/6c3067849.html,ART_Mode = USART_Mode_Rx | USART_Mode_Tx; //指定使能或失能发送和接受模式Tx发送使能和Rx接收使能

USART_Clock https://www.wendangku.net/doc/6c3067849.html,ART_Clock = USART_Clock_Disable; //提升USART时钟时使能还是失能，钟低电平活动

USART_https://www.wendangku.net/doc/6c3067849.html,ART_CPOL = USART_CPOL_Low; //指定SLCK引脚上时钟的极性

USART_https://www.wendangku.net/doc/6c3067849.html,ART_CPHA = USART_CPHA_2Edge; //时钟第二个边缘进行数据捕获

USART_https://www.wendangku.net/doc/6c3067849.html,ART_LastBit = USART_LastBit_Disable; //在SCLK引脚上输出最后发送的那个数据字的脉冲不从SCLK输出

USART_ClockInit(USART1, &USART_ClockInitStructure);

USART_Init(USART1, &USART_InitStructure);

/*输入输出的中断使能*/

// USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

USART_Cmd(USART1, ENABLE); //启动串口使能USART1外设

while(1)

{

}

/*

USART_SendData(USART1, 0X26); //发送数据

while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){}//等待发送结束*/

}

void NVIC_Configuration(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

#ifdef VETB_TAB_RAM

NVYC_SetVectorTable(NVIC_VectTab_RAM,0x0);

#else

NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);

#endif

/* Enable the USART1 Interrupt */

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel; //通道设置为串口1中断（故后面应选择在“void USART1_IRQHandler(void)”开中断）

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //中断占先等级0

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //中断响应优先级0 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //打开中断

NVIC_Init(&NVIC_InitStructure);

}

void RCC_Configuration(void)

{

RCC_DeInit();

RCC_HSEConfig(RCC_HSE_ON);

HSEStartUpStatus=RCC_WaitForHSEStartUp();

if(HSEStartUpStatus==SUCCESS)

{

FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

FLASH_SetLatency(FLASH_Latency_2);

RCC_HCLKConfig(RCC_SYSCLK_Div1);

RCC_PCLK2Config(RCC_HCLK_Div1); //串口波特率的确定

RCC_PCLK1Config(RCC_HCLK_Div2);

RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

RCC_PLLCmd(ENABLE);

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY==RESET)) {}

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

while(RCC_GetSYSCLKSource()!=0x08){}

}

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOE|RCC_APB 2Periph_USART1, ENABLE); //RCC中打开相应的串口

}

void GPIO_Configuration(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

// GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE); //改变指定管脚脚的映射Changes the mapping of the specified pin

/* Configure USART1 RTS (PA12) and USART1 Tx (PA9) as alternate function push-pull 根据资料可查得各管脚对应*/

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推挽输出

GPIO_Init(GPIOA, &GPIO_InitStructure);

/* Configure USART2 CTS (PA11) and USART1 Rx (PA10) as input floating */

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_10;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1|GPIO_Pin_0|GPIO_Pin_2|GPIO_Pin_3;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;

GPIO_Init(GPIOE,&GPIO_InitStructure);

}

中断函数：（可在stm32f10x_.it.c中调用）

void USART1_IRQHandler(void)

{

u8 RX_dat; //定义字符变量

if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //判断发生接收中断{

GPIO_WriteBit(GPIOE, GPIO_Pin_1, (BitAction)0x01); //LED M

RX_dat=(USART_ReceiveData(USART1) & 0x7F); //接收数据，整理除去前两位USART_ClearITPendingBit(USART1, USART_IT_RXNE); //清除中断标志while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET){}//等待接收结束

// USART_ITConfig(USART1, USART_IT_RXNE, DISABLE); //关中断USART_SendData(USART1,RX_dat); //发送数据

GPIO_WriteBit(GPIOE, GPIO_Pin_2, (BitAction)0x01); //LED M }

}