Stm32RS232串口通信——中斷接收發(fā)送數(shù)據(jù)

main.c配置：

/*

*說明：

*PA0:KEY1;PA1:KEY2;

*PA2:LED1;PA3:LED2;

*PA9:USART1_TX;PA10:USART1_RX

*/

#include"stm32f10x.h"

#include"stm32f10x_rcc.h"

#include"stm32f10x_gpio.h"

#include"stm32f10x_usart.h"

#include"stm32f10x_exti.h"

#include"system_stm32f10x.h"

#include"misc.h"

voidRCC_Configuration(void);

voidGPIO_Configuration(void);

voidUSART_Configuration(void);

voidNVIC_Configuration(void);

intmain()

{

SystemInit();//72m

RCC_Configuration();

GPIO_Configuration();

USART_Configuration();

NVIC_Configuration();

while(1);

}

voidRCC_Configuration(void)

{

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);

}

voidGPIO_Configuration(void)

{

GPIO_InitTypeDefGPIO_InitStructure;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;//管腳9

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;//復用推挽輸出

GPIO_Init(GPIOA,&GPIO_InitStructure);//TX初始化

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//管腳10

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;//浮空輸入

GPIO_Init(GPIOA,&GPIO_InitStructure);//RX初始化

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2|GPIO_Pin_3;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;

GPIO_Init(GPIOA,&GPIO_InitStructure);

}

voidUSART_Configuration(void)//串口初始化函數(shù)

{

//串口參數(shù)初始化

USART_InitTypeDefUSART_InitStructure;//串口設置恢復默認參數(shù)

//初始化參數(shù)設置

USART_InitStructure.USART_BaudRate=9600;//波特率9600

USART_InitStructure.USART_WordLength=USART_WordLength_8b;//字長8位

USART_InitStructure.USART_StopBits=USART_StopBits_1;//1位停止字節(jié)

USART_InitStructure.USART_Parity=USART_Parity_No;//無奇偶校驗

USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;//無流控制

USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;//打開Rx接收和Tx發(fā)送功能

USART_Init(USART1,&USART_InitStructure);//初始化

USART_ITConfig(USART1,USART_IT_TXE,ENABLE);//允許串口1發(fā)送中斷。

USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);//允許串口1接收中斷。

USART_Cmd(USART1,ENABLE);//啟動串口

USART_ClearFlag(USART1,USART_FLAG_TC);//發(fā)送完成標志位

}

voidNVIC_Configuration(void)//配置中斷優(yōu)先級

{

NVIC_InitTypeDefNVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;

NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;

NVIC_Init(&NVIC_InitStructure);

}

stm32f10x_it.c的中斷函數(shù)接收發(fā)送數(shù)據(jù)（接收和發(fā)送的時候改變LED狀態(tài)）：

#include"..includestm32f10x.h"

#include"..includestm32f10x_it.h"

#include"..includestm32f10x_gpio.h"

#include"..includestm32f10x_usart.h"

voidUSART1_IRQHandler(void)

{

u8RX_dat;

if(USART_GetITStatus(USART1,USART_IT_RXNE)==SET)//USART_IT_RXNE：接收中斷

{

USART_ClearITPendingBit(USART1,USART_IT_RXNE);

RX_dat=USART_ReceiveData(USART1);

while(USART_GetFlagStatus(USART1,USART_FLAG_RXNE)==RESET){}//接收數(shù)據(jù)寄存器非空標志位

GPIO_WriteBit(GPIOA,GPIO_Pin_2,(BitAction)(Bit_SET-GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_2)));

USART_SendData(USART1,RX_dat);

while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET){}//發(fā)送數(shù)據(jù)寄存器空標志位

GPIO_WriteBit(GPIOA,GPIO_Pin_3,(BitAction)(Bit_SET-GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_3)));

}

}