STM32:串口发送/接收HEX数据包代码篇(内含：实物图接线图+代码部分+个人笔记)

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"
#include "Serial.h"
#include "Key.h"
uint8_t KeyNum;
int main(void)
{
    OLED_Init();
    Serial_Init();
    OLED_ShowString(1,1,"RxData");
    OLED_ShowString(3,1,"TxData");
    //赋初值
    Serial_TxPacket[0]=0x01;
    Serial_TxPacket[1]=0x02;
    Serial_TxPacket[2]=0x03;
    Serial_TxPacket[3]=0x04;
    while (1)
    {
        KeyNum = Key_GetNum();
        if(KeyNum==1)
        {
            Serial_SendPacket();//发送数据包
            Serial_TxPacket[0]++;
            Serial_TxPacket[1]++;
            Serial_TxPacket[2]++;
          Serial_TxPacket[3]++;
            OLED_ShowHexNum(2,1,Serial_TxPacket[0],2);
            OLED_ShowHexNum(2,4,Serial_TxPacket[1],2);
            OLED_ShowHexNum(2,7,Serial_TxPacket[2],2);
            OLED_ShowHexNum(2,10,Serial_TxPacket[3],2);
        }
        if(Serial_GetRxFlag() == 1)//标志位结束判断
        {
            OLED_ShowHexNum(4,1,Serial_TxPacket[0],2);
            OLED_ShowHexNum(4,4,Serial_TxPacket[1],2);
            OLED_ShowHexNum(4,7,Serial_TxPacket[2],2);
            OLED_ShowHexNum(4,10,Serial_TxPacket[3],2);
        }
    }
}

#include "stm32f10x.h"                  // Device header
uint8_t Serial_RxFlag;
uint8_t Serial_TxPacket[4];
uint8_t Serial_RxPacket[4];//接收库函数USART_Serial_ReceiveData(USART1)的值，
void Serial_Init(void)
{
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_PP;
    GPIO_InitStruct.GPIO_Pin=GPIO_Pin_9;
    GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStruct);
    GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IPU;
    GPIO_InitStruct.GPIO_Pin=GPIO_Pin_10;
    GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
    GPIO_Init(GPIOA,&GPIO_InitStruct);
    USART_InitTypeDef USART_InitStruct;
    USART_InitStruct.USART_BaudRate=9600;
    USART_InitStruct.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
    USART_InitStruct.USART_Mode=USART_Mode_Tx;
    USART_InitStruct.USART_Parity=USART_Parity_No;
    USART_InitStruct.USART_StopBits=1;
    USART_InitStruct.USART_WordLength=0;
    USART_Init(USART1,&USART_InitStruct);
    USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
    NVIC_InitTypeDef NVIC_InitStruct;
    NVIC_InitStruct.NVIC_IRQChannel=USART1_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;
    NVIC_Init(&NVIC_InitStruct);
    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 Lenth)
{
    uint8_t i;
    for(i=0;i<Lenth;i++)
    {
        USART_SendData(USART1,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(uint16_t x,uint16_t y)
{
    uint32_t Return;
    while(y--)
    {
        Return*=x;
    }
        return Return;
}
void Serial_SendNumber(uint32_t Number,uint8_t Lenth)
{
    uint8_t i;
    for(i=0;i<Number;i++)
    {
        USART_SendData(USART1,Number/Serial_Pow(10,Lenth-1-i)%10+0x40);
    }
}
uint8_t Serial_GetRxFlag(void)
{
    if(Serial_RxFlag==1)
    {
        Serial_RxFlag=0;
        return 1;
    }
    else
        return 0;
}
//调用该函数，TxPacket的四个数据会自动发送出去
void Serial_SendPacket(void)
{
    Serial_SendByte(0xFF);//发送包头(数据用Byte)
    Serial_SendArray(Serial_TxPacket,4);//发送载荷数据(数组用Array)
    Serial_SendByte(0xFE);
}
//接收数据
void USART1_IRQHandler(void)
{
    static uint8_t RxState=0;//分情况判断
    static uint8_t pRxPacket=0;//数组下标判断
    if(USART_GetITStatus(USART1,USART_IT_RXNE)==SET)
    {
        uint8_t RxData=USART_ReceiveData(USART1);
        if(RxState==0)
        {
            if(RxData==0xFF)
            {
                RxState=1;
                pRxPacket=0;
            }
        }
        else if(RxState==1)
        {
            Serial_RxPacket[pRxPacket]=RxData;//将RxData放在数组里,pRxPacket表示存的位置
            pRxPacket++;
            if(pRxPacket>=4)
            {
                RxState=2;
            }
        }
        else if(RxState==2)
        {
            if(RxData==0xFE)
            {
                RxState=0;
                Serial_RxFlag=1;//置标志位，告诉已结束
            }
        }
        USART_ClearITPendingBit(USART1,USART_IT_RXNE);
    }
}

#ifndef  __SERIAL_H
#define  __SERIAL_H
extern uint8_t Serial_TxPacket[];
extern uint8_t Serial_RxPacket[];
void Serial_Init(void);
void Serial_SendByte(uint8_t Byte);
void Serial_SendArray(uint8_t *Array,uint16_t Lenth);
void Serial_SendString(char* String);
uint32_t  Serial_Pow(uint16_t x,uint16_t y);
void Serial_SendNumber(uint32_t Number,uint8_t Lenth);
void USART1_IRQHandler(void);
uint8_t Serial_GetRxFlag(void);
void Serial_SendPacket(void);
#endif