stm32应用-简单的串口接收与发送程序
2016-11-09 22:18
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与上位机的串口通信是一个很常用的程序。碧海蓝天在刚刚接触stm32芯片时写的第一个简单程序就是串口通信，现在把程序代码甩出来与大家分享。完整的程序哦~一般人我不告诉他
库版本 ：ST3.0.0
文件：mian.c
//功能：串口初始化、打开定时器中断，然后一直接收数据状态就好了。发送在中断中实现
#include "stm32f10x.h"
#include "usart.h"
u8 USART_rx_data;
int main(void)
{
RCC_Configuration(); //系统时钟配置
GPIO_Configuration(); //端口初始化
NVIC_Configuration(); //中断源配置
USART_Configuration(); //串口1初始化
Time_Init(); //定时器初始化
#ifdef DEBUG
debug();
#endif
TIM_Cmd(TIM3,ENABLE);
while(1)
{
}
}
文件：usart.c
#include "stm32f10x.h"
#include "stdio.h"
#include "usart.h"
unsigned char auchCRCHi [256] ={
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40};
unsigned char auchCRCLo [256] ={
0x00,0xC0,0xC1,0x01,0xC3,0x03,0x02,0xC2,0xC6,0x06,0x07,0xC7,0x05,0xC5,0xC4,0x04,
0xCC,0x0C,0x0D,0xCD,0x0F,0xCF,0xCE,0x0E,0x0A,0xCA,0xCB,0x0B,0xC9,0x09,0x08,0xC8,
0xD8,0x18,0x19,0xD9,0x1B,0xDB,0xDA,0x1A,0x1E,0xDE,0xDF,0x1F,0xDD,0x1D,0x1C,0xDC,
0x14,0xD4,0xD5,0x15,0xD7,0x17,0x16,0xD6,0xD2,0x12,0x13,0xD3,0x11,0xD1,0xD0,0x10,
0xF0,0x30,0x31,0xF1,0x33,0xF3,0xF2,0x32,0x36,0xF6,0xF7,0x37,0xF5,0x35,0x34,0xF4,
0x3C,0xFC,0xFD,0x3D,0xFF,0x3F,0x3E,0xFE,0xFA,0x3A,0x3B,0xFB,0x39,0xF9,0xF8,0x38,
0x28,0xE8,0xE9,0x29,0xEB,0x2B,0x2A,0xEA,0xEE,0x2E,0x2F,0xEF,0x2D,0xED,0xEC,0x2C,
0xE4,0x24,0x25,0xE5,0x27,0xE7,0xE6,0x26,0x22,0xE2,0xE3,0x23,0xE1,0x21,0x20,0xE0,
0xA0,0x60,0x61,0xA1,0x63,0xA3,0xA2,0x62,0x66,0xA6,0xA7,0x67,0xA5,0x65,0x64,0xA4,
0x6C,0xAC,0xAD,0x6D,0xAF,0x6F,0x6E,0xAE,0xAA,0x6A,0x6B,0xAB,0x69,0xA9,0xA8,0x68,
0x78,0xB8,0xB9,0x79,0xBB,0x7B,0x7A,0xBA,0xBE,0x7E,0x7F,0xBF,0x7D,0xBD,0xBC,0x7C,
0xB4,0x74,0x75,0xB5,0x77,0xB7,0xB6,0x76,0x72,0xB2,0xB3,0x73,0xB1,0x71,0x70,0xB0,
0x50,0x90,0x91,0x51,0x93,0x53,0x52,0x92,0x96,0x56,0x57,0x97,0x55,0x95,0x94,0x54,
0x9C,0x5C,0x5D,0x9D,0x5F,0x9F,0x9E,0x5E,0x5A,0x9A,0x9B,0x5B,0x99,0x59,0x58,0x98,
0x88,0x48,0x49,0x89,0x4B,0x8B,0x8A,0x4A,0x4E,0x8E,0x8F,0x4F,0x8D,0x4D,0x4C,0x8C,
0x44,0x84,0x85,0x45,0x87,0x47,0x46,0x86,0x82,0x42,0x43,0x83,0x41,0x81,0x80,0x40};
unsigned short CRC16(unsigned char* puchMsg, unsigned short usDataLen)
{
unsigned char uchCRCHi = 0xFF ;
unsigned char uchCRCLo = 0xFF ;
unsigned char uIndex ;
while (usDataLen--)
{
uIndex = uchCRCHi^*puchMsg++;
uchCRCHi = uchCRCLo^auchCRCHi[uIndex];
uchCRCLo = auchCRCLo[uIndex];
}
return (uchCRCHi << 8 | uchCRCLo) ;
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus; //枚举变量，定义高速时钟的启动状态
RCC_DeInit(); //RCC系统重置，用于Debug目的
RCC_HSEConfig(RCC_HSE_ON); //使能高速时钟源HSE
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE稳定
if(HSEStartUpStatus == SUCCESS)
{
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
RCC_HCLKConfig(RCC_SYSCLK_Div1); // HCLK = SYSCLK
RCC_PCLK2Config(RCC_HCLK_Div1); // PCLK2 = HCLK
RCC_PCLK1Config(RCC_HCLK_Div2); ///PCLK1 = HCLK/2
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_USART1 |RCC_APB2Periph_GPIOA |RCC_APB2Periph_AFIO |RCC_APB2Periph_GPIOB , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
}
//------------------------------------------------------------------
//函数名：void GPIO_Configuration()
//输入参数：null
//返回参数：null
//说明：GPIO初始化函数
//------------------------------------------------------------------
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure; //GPIO初始化结构体声明
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //USART1 TX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //USART1 RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //复用浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
//------------------------------------------------------------------
//函数名：void NVIC_Configuration()
//输入参数：null
//返回参数：null
//说明：NVIC初始化函数
//------------------------------------------------------------------
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure; //NVIC初始化结构体声明
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); //如果程序在RAM中调试那么定义中断向量表在RAM中否则在Flash中
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //设置串口1中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级 0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //设置定时器3全局中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级 1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_Init(&NVIC_InitStructure);
}
//------------------------------------------------------------------
//函数名：void USART_Configuration()
//输入参数：null
//返回参数：null
//说明:串口初始化函数
//------------------------------------------------------------------
void USART_Configuration(void){
USART_InitTypeDef USART_InitStructure; //串口初始化结构体声明
USART_ClockInitTypeDef USART_ClockInitStruct;
USART_InitStructure.USART_BaudRate = 115200; //设置波特率为115200bps
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位
USART_InitStructure.USART_Parity = USART_Parity_No; //无校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件流控
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //接受和发送模式都打开
USART_ClockInitStruct.USART_Clock=USART_Clock_Disable; //串口时钟禁止
USART_ClockInitStruct.USART_CPOL=USART_CPOL_Low; //数据低电平有效
USART_ClockInitStruct.USART_CPHA=USART_CPHA_2Edge; //配置CPHA使数据在第2个边沿的时候被捕获
USART_ClockInitStruct.USART_LastBit=USART_LastBit_Disable; // 禁用最后一位,使对应的时钟脉冲不会再输出到SCLK引脚
USART_ClockInit(USART1, &USART_ClockInitStruct); //配置USART与时钟相关的设置
USART_Init(USART1, &USART_InitStructure); //配置串口参数函数
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能接收中断
//USART_ITConfig(USART1, USART_IT_TXE, ENABLE); //使能发送缓冲空中断
//USART_ITConfig(USART1, USART_IT_TC, ENABLE); //使能发送完成中断
USART_ClearFlag(USART1,USART_FLAG_TC); //清除发送完成标志位
USART_Cmd(USART1, ENABLE); //使能串口1
}
//------------------------------------------------------------------
//函数名：void Time_Init()
//输入参数：null
//返回参数：null
//说明:定时器初始化函数
//------------------------------------------------------------------
void Time_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_DeInit(TIM3); //复位TIM3定时器
TIM_TimeBaseStructure.TIM_Period =7999; //设置自动重装载寄存器锁存值，1ms溢出
TIM_TimeBaseStructure.TIM_Prescaler = 8; //9分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //时钟分频因子
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //计数器向上计数模式
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure); //写TIM3各寄存器参数
TIM_ClearFlag(TIM3,TIM_FLAG_Update);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
}
文件：usart.h
#ifndef _USART_H
#define _USART_H
#include
#include "stm32f10x.h"
void RCC_Configuration(void); //声明RCC初始化函数
void GPIO_Configuration(void); //声明GPIO初始化函数
void NVIC_Configuration(void); //声明NVIC初始化函数
void USART_Configuration(void); //声明串口初始化函数
void Time_Init(void); //声明定时器初始化函数
unsigned short CRC16(unsigned char* puchMsg, unsigned short usDataLen);
#endif
文件：stm32f103x_it.c
//需要设置串口接收中断和定时器3中断，中断时间为1ms
//------------------------------------------------------------------
//函数名：void USART1_IRQHandler(void)
//输入参数：null
//返回参数：null
//说明：串口接收中断服务
//------------------------------------------------------------------
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //判断读寄存器是否非空
{
// GPIO_SetBits(GPIOB,GPIO_Pin_6);
rx_data[RbufCounter++]=USART_ReceiveData(USART1); //接收字节到接收缓冲区
if(USART_Rsv_Status==0)
{
if(RbufCounter>1)
{
if(rx_data[0]==0xA5&&rx_data[1]==0x5A) //当接收到的数据帧头两个字节同时为0xA5和0x5A时
{
USART_Rsv_Status=1;
// USART_SendData(USART1, rx_data[0]);
}
else
{
rx_data[0]=rx_data[1];
RbufCounter=1;
}
}
}
else
{
USART_1ms_Cnt=0;
}
}
}
//------------------------------------------------------------------
//函数名：void TIM2_IRQHandler(void)
//输入参数：null
//返回参数：null
//说明：定时器2中断服务
//------------------------------------------------------------------
void TIM2_IRQHandler(void)
{
}
//------------------------------------------------------------------
//函数名：void TIM3_IRQHandler(void)
//输入参数：null
//返回参数：null
//说明：定时器3中断服务
//------------------------------------------------------------------
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET) //判断是否为定时器3溢出中断
{
GPIO_SetBits(GPIOB,GPIO_Pin_6);
TIM_ClearITPendingBit(TIM3, TIM_IT_Update); //清中断标记
if(USART_Rsv_Status==1)
USART_1ms_Cnt++;
if(USART_1ms_Cnt>5)
{
// USART_SendData(USART1,0xAA);
USART_Rsv_Status=0; //连续计数超过5次对USART_Rsv_Status置0，继续等待接收
USART_1ms_Cnt=0; //当USART_1ms_Cnt>5时对USART_1ms_Cnt重新清零
if(RbufCounter==(u16)rx_data[4]+7) //检验数据的完整性
{
int i; //定义循环变量
int j;
data_length=rx_data[4];
for(i=0;i
{
data[i]=rx_data[i];
}
CRC_data_Hi=rx_data[RbufCounter-1];
CRC_data_Lo=rx_data[RbufCounter-2];
CRC_data=CRC16((unsigned char*)data,data_length+5);
CRC_data_Hi1=CRC_data>>8;
CRC_data_Lo1=CRC_data&0x00ff;
if(CRC_data_Hi==(u8)CRC_data_Hi1 && CRC_data_Lo==CRC_data_Lo1)
{
for(j=0;rx_data[j]!='\0';j++) //循环逐字输出，到结束字'\0'
{
USART_SendData(USART1, rx_data[j]); //发送字符
库版本 ：ST3.0.0
文件：mian.c
//功能：串口初始化、打开定时器中断，然后一直接收数据状态就好了。发送在中断中实现
#include "stm32f10x.h"
#include "usart.h"
u8 USART_rx_data;
int main(void)
{
RCC_Configuration(); //系统时钟配置
GPIO_Configuration(); //端口初始化
NVIC_Configuration(); //中断源配置
USART_Configuration(); //串口1初始化
Time_Init(); //定时器初始化
#ifdef DEBUG
debug();
#endif
TIM_Cmd(TIM3,ENABLE);
while(1)
{
}
}
文件：usart.c
#include "stm32f10x.h"
#include "stdio.h"
#include "usart.h"
unsigned char auchCRCHi [256] ={
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40};
unsigned char auchCRCLo [256] ={
0x00,0xC0,0xC1,0x01,0xC3,0x03,0x02,0xC2,0xC6,0x06,0x07,0xC7,0x05,0xC5,0xC4,0x04,
0xCC,0x0C,0x0D,0xCD,0x0F,0xCF,0xCE,0x0E,0x0A,0xCA,0xCB,0x0B,0xC9,0x09,0x08,0xC8,
0xD8,0x18,0x19,0xD9,0x1B,0xDB,0xDA,0x1A,0x1E,0xDE,0xDF,0x1F,0xDD,0x1D,0x1C,0xDC,
0x14,0xD4,0xD5,0x15,0xD7,0x17,0x16,0xD6,0xD2,0x12,0x13,0xD3,0x11,0xD1,0xD0,0x10,
0xF0,0x30,0x31,0xF1,0x33,0xF3,0xF2,0x32,0x36,0xF6,0xF7,0x37,0xF5,0x35,0x34,0xF4,
0x3C,0xFC,0xFD,0x3D,0xFF,0x3F,0x3E,0xFE,0xFA,0x3A,0x3B,0xFB,0x39,0xF9,0xF8,0x38,
0x28,0xE8,0xE9,0x29,0xEB,0x2B,0x2A,0xEA,0xEE,0x2E,0x2F,0xEF,0x2D,0xED,0xEC,0x2C,
0xE4,0x24,0x25,0xE5,0x27,0xE7,0xE6,0x26,0x22,0xE2,0xE3,0x23,0xE1,0x21,0x20,0xE0,
0xA0,0x60,0x61,0xA1,0x63,0xA3,0xA2,0x62,0x66,0xA6,0xA7,0x67,0xA5,0x65,0x64,0xA4,
0x6C,0xAC,0xAD,0x6D,0xAF,0x6F,0x6E,0xAE,0xAA,0x6A,0x6B,0xAB,0x69,0xA9,0xA8,0x68,
0x78,0xB8,0xB9,0x79,0xBB,0x7B,0x7A,0xBA,0xBE,0x7E,0x7F,0xBF,0x7D,0xBD,0xBC,0x7C,
0xB4,0x74,0x75,0xB5,0x77,0xB7,0xB6,0x76,0x72,0xB2,0xB3,0x73,0xB1,0x71,0x70,0xB0,
0x50,0x90,0x91,0x51,0x93,0x53,0x52,0x92,0x96,0x56,0x57,0x97,0x55,0x95,0x94,0x54,
0x9C,0x5C,0x5D,0x9D,0x5F,0x9F,0x9E,0x5E,0x5A,0x9A,0x9B,0x5B,0x99,0x59,0x58,0x98,
0x88,0x48,0x49,0x89,0x4B,0x8B,0x8A,0x4A,0x4E,0x8E,0x8F,0x4F,0x8D,0x4D,0x4C,0x8C,
0x44,0x84,0x85,0x45,0x87,0x47,0x46,0x86,0x82,0x42,0x43,0x83,0x41,0x81,0x80,0x40};
unsigned short CRC16(unsigned char* puchMsg, unsigned short usDataLen)
{
unsigned char uchCRCHi = 0xFF ;
unsigned char uchCRCLo = 0xFF ;
unsigned char uIndex ;
while (usDataLen--)
{
uIndex = uchCRCHi^*puchMsg++;
uchCRCHi = uchCRCLo^auchCRCHi[uIndex];
uchCRCLo = auchCRCLo[uIndex];
}
return (uchCRCHi << 8 | uchCRCLo) ;
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus; //枚举变量，定义高速时钟的启动状态
RCC_DeInit(); //RCC系统重置，用于Debug目的
RCC_HSEConfig(RCC_HSE_ON); //使能高速时钟源HSE
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE稳定
if(HSEStartUpStatus == SUCCESS)
{
FLASH_SetLatency(FLASH_Latency_2);
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
RCC_HCLKConfig(RCC_SYSCLK_Div1); // HCLK = SYSCLK
RCC_PCLK2Config(RCC_HCLK_Div1); // PCLK2 = HCLK
RCC_PCLK1Config(RCC_HCLK_Div2); ///PCLK1 = HCLK/2
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_USART1 |RCC_APB2Periph_GPIOA |RCC_APB2Periph_AFIO |RCC_APB2Periph_GPIOB , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
}
//------------------------------------------------------------------
//函数名：void GPIO_Configuration()
//输入参数：null
//返回参数：null
//说明：GPIO初始化函数
//------------------------------------------------------------------
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure; //GPIO初始化结构体声明
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //USART1 TX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //USART1 RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //复用浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure); //A端口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
//------------------------------------------------------------------
//函数名：void NVIC_Configuration()
//输入参数：null
//返回参数：null
//说明：NVIC初始化函数
//------------------------------------------------------------------
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure; //NVIC初始化结构体声明
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); //如果程序在RAM中调试那么定义中断向量表在RAM中否则在Flash中
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //设置串口1中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级 0
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //设置定时器3全局中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //抢占优先级 1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //子优先级为0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能
NVIC_Init(&NVIC_InitStructure);
}
//------------------------------------------------------------------
//函数名：void USART_Configuration()
//输入参数：null
//返回参数：null
//说明:串口初始化函数
//------------------------------------------------------------------
void USART_Configuration(void){
USART_InitTypeDef USART_InitStructure; //串口初始化结构体声明
USART_ClockInitTypeDef USART_ClockInitStruct;
USART_InitStructure.USART_BaudRate = 115200; //设置波特率为115200bps
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位
USART_InitStructure.USART_Parity = USART_Parity_No; //无校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无硬件流控
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //接受和发送模式都打开
USART_ClockInitStruct.USART_Clock=USART_Clock_Disable; //串口时钟禁止
USART_ClockInitStruct.USART_CPOL=USART_CPOL_Low; //数据低电平有效
USART_ClockInitStruct.USART_CPHA=USART_CPHA_2Edge; //配置CPHA使数据在第2个边沿的时候被捕获
USART_ClockInitStruct.USART_LastBit=USART_LastBit_Disable; // 禁用最后一位,使对应的时钟脉冲不会再输出到SCLK引脚
USART_ClockInit(USART1, &USART_ClockInitStruct); //配置USART与时钟相关的设置
USART_Init(USART1, &USART_InitStructure); //配置串口参数函数
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能接收中断
//USART_ITConfig(USART1, USART_IT_TXE, ENABLE); //使能发送缓冲空中断
//USART_ITConfig(USART1, USART_IT_TC, ENABLE); //使能发送完成中断
USART_ClearFlag(USART1,USART_FLAG_TC); //清除发送完成标志位
USART_Cmd(USART1, ENABLE); //使能串口1
}
//------------------------------------------------------------------
//函数名：void Time_Init()
//输入参数：null
//返回参数：null
//说明:定时器初始化函数
//------------------------------------------------------------------
void Time_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_DeInit(TIM3); //复位TIM3定时器
TIM_TimeBaseStructure.TIM_Period =7999; //设置自动重装载寄存器锁存值，1ms溢出
TIM_TimeBaseStructure.TIM_Prescaler = 8; //9分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //时钟分频因子
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //计数器向上计数模式
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure); //写TIM3各寄存器参数
TIM_ClearFlag(TIM3,TIM_FLAG_Update);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
}
文件：usart.h
#ifndef _USART_H
#define _USART_H
#include
#include "stm32f10x.h"
void RCC_Configuration(void); //声明RCC初始化函数
void GPIO_Configuration(void); //声明GPIO初始化函数
void NVIC_Configuration(void); //声明NVIC初始化函数
void USART_Configuration(void); //声明串口初始化函数
void Time_Init(void); //声明定时器初始化函数
unsigned short CRC16(unsigned char* puchMsg, unsigned short usDataLen);
#endif
文件：stm32f103x_it.c
//需要设置串口接收中断和定时器3中断，中断时间为1ms
//------------------------------------------------------------------
//函数名：void USART1_IRQHandler(void)
//输入参数：null
//返回参数：null
//说明：串口接收中断服务
//------------------------------------------------------------------
void USART1_IRQHandler(void)
{
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //判断读寄存器是否非空
{
// GPIO_SetBits(GPIOB,GPIO_Pin_6);
rx_data[RbufCounter++]=USART_ReceiveData(USART1); //接收字节到接收缓冲区
if(USART_Rsv_Status==0)
{
if(RbufCounter>1)
{
if(rx_data[0]==0xA5&&rx_data[1]==0x5A) //当接收到的数据帧头两个字节同时为0xA5和0x5A时
{
USART_Rsv_Status=1;
// USART_SendData(USART1, rx_data[0]);
}
else
{
rx_data[0]=rx_data[1];
RbufCounter=1;
}
}
}
else
{
USART_1ms_Cnt=0;
}
}
}
//------------------------------------------------------------------
//函数名：void TIM2_IRQHandler(void)
//输入参数：null
//返回参数：null
//说明：定时器2中断服务
//------------------------------------------------------------------
void TIM2_IRQHandler(void)
{
}
//------------------------------------------------------------------
//函数名：void TIM3_IRQHandler(void)
//输入参数：null
//返回参数：null
//说明：定时器3中断服务
//------------------------------------------------------------------
void TIM3_IRQHandler(void)
{
if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET) //判断是否为定时器3溢出中断
{
GPIO_SetBits(GPIOB,GPIO_Pin_6);
TIM_ClearITPendingBit(TIM3, TIM_IT_Update); //清中断标记
if(USART_Rsv_Status==1)
USART_1ms_Cnt++;
if(USART_1ms_Cnt>5)
{
// USART_SendData(USART1,0xAA);
USART_Rsv_Status=0; //连续计数超过5次对USART_Rsv_Status置0，继续等待接收
USART_1ms_Cnt=0; //当USART_1ms_Cnt>5时对USART_1ms_Cnt重新清零
if(RbufCounter==(u16)rx_data[4]+7) //检验数据的完整性
{
int i; //定义循环变量
int j;
data_length=rx_data[4];
for(i=0;i
{
data[i]=rx_data[i];
}
CRC_data_Hi=rx_data[RbufCounter-1];
CRC_data_Lo=rx_data[RbufCounter-2];
CRC_data=CRC16((unsigned char*)data,data_length+5);
CRC_data_Hi1=CRC_data>>8;
CRC_data_Lo1=CRC_data&0x00ff;
if(CRC_data_Hi==(u8)CRC_data_Hi1 && CRC_data_Lo==CRC_data_Lo1)
{
for(j=0;rx_data[j]!='\0';j++) //循环逐字输出，到结束字'\0'
{
USART_SendData(USART1, rx_data[j]); //发送字符
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