USART串口发送和接收数据

主函数

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "LED.h"
#include "Key.h"
#include "stdint.h"
#include "OLED.h"
#include "Serial.h"uint8_t RxData;int main(void)
{OLED_Init();OLED_ShowString(1,1,"RxData:");Serial_Init();while(1){if(Serial_GetRxFlag()==1){RxData=Serial_GetRxData();Serial_SendByte(RxData);OLED_ShowHexNum(1,1,RxData,2);}}
}

串口.c

#include "stm32f10x.h"                  // Device header
#include "stdint.h"uint8_t Serial_RxData;
uint8_t Serial_RxFlag;void Serial_Init(void)
{RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);GPIO_InitTypeDef GPIO_InitStructure;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOA,&GPIO_InitStructure);GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOA,&GPIO_InitStructure);USART_InitTypeDef USART_InitSturcture;USART_InitSturcture.USART_BaudRate=9600;USART_InitSturcture.USART_HardwareFlowControl=USART_HardwareFlowControl_None;USART_InitSturcture.USART_Mode=USART_Mode_Tx|USART_Mode_Rx;USART_InitSturcture.USART_Parity=USART_Parity_No;USART_InitSturcture.USART_StopBits=USART_StopBits_1;USART_InitSturcture.USART_WordLength=USART_WordLength_8b;USART_Init(USART1,&USART_InitSturcture);USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);NVIC_InitTypeDef NVIC_InitStructure;NVIC_InitStructure.NVIC_IRQChannel=USART1_IRQn;NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;NVIC_Init(&NVIC_InitStructure);USART_Cmd(USART1,ENABLE);
}void Serial_SendByte(uint8_t Byte)
{USART_SendData(USART1,Byte);while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
}void Serial_SendArray(uint8_t *Array,uint16_t Length)
{uint16_t i;for(i=0;i<Length;i++){Serial_SendByte(Array[i]);}
}void Serial_SendString(char *String)
{uint8_t i;for(i=0;String[i]!='\0';i++){Serial_SendByte(String[i]);}
}uint32_t Serial_Pow(uint32_t X,uint32_t Y)  
{uint32_t Result = 1;while(Y--){Result *=X;}return Result;
}void Serial_SendNumber(uint32_t Number,uint8_t Length)
{uint8_t i;for(i=0;i<Length;i++){Serial_SendByte(Number / Serial_Pow(10,Length-i-1)%10+0x30);                 }
}uint8_t Serial_GetRxFlag(void)
{if(Serial_RxFlag==1){Serial_RxFlag=0;return 1;}return 0;
}uint8_t Serial_GetRxData(void)
{return Serial_RxData;
}void USART1_IRQHandler(void)   
{if(USART_GetITStatus(USART1,USART_IT_RXNE)==SET){Serial_RxData=USART_ReceiveData(USART1);Serial_RxFlag=1;USART_ClearITPendingBit(USART1,USART_IT_RXNE);//手动清除USART1接收标志位}
}	

串口.h

#ifndef __SERIAL_H
#define __SERIAL_H
#include "stdint.h"
void Serial_SendByte(uint8_t Byte);
void Serial_Init(void);
void Serial_SendArray(uint8_t *Array,uint16_t Length);
void Serial_SendString(char *String);
void Serial_SendNumber(uint32_t Number,uint8_t Length);
uint8_t Serial_GetRxFlag(void);
uint8_t Serial_GetRxData(void);
#endif