TEST/TEST_Prj/stm32_std_proprj/Demo/SYSTEM/usart/usart.c

#include "sys.h"
#include "usart.h"	  
#include "string.h"
#include "led.h"
#include "stdlib.h"
#include "stdio.h"


char  Usart1ReadBuff[Usart1ReadLen]={0};  //接收数据缓存
u16 Usart1ReadCnt = 0;//串口1接收到的数据个数
u16 Usart1IdleCnt = 0;//空闲检测用

char  Usart2ReadBuff[Usart2ReadLen]={0};  //接收数据缓存
u16 Usart2ReadCnt = 0;//串口1接收到的数据个数
u16 Usart2IdleCnt = 0;//空闲检测用

char  Usart3ReadBuff[Usart3ReadLen]={0};  //接收数据缓存
u16 Usart3ReadCnt = 0;//串口1接收到的数据个数
u16 Usart3IdleCnt = 0;//空闲检测用
////////////////////////////////////////////////////////////////////////////////// 	 
//如果使用ucos,则包括下面的头文件即可.
#if SYSTEM_SUPPORT_OS
#include "includes.h"					//ucos 使用	  
#endif

void sendData(char *p,unsigned  char n);


//加入以下代码,支持printf函数,而不需要选择use MicroLIB	  
#if 1
#pragma import(__use_no_semihosting)             
//标准库需要的支持函数                 
struct __FILE 
{ 
	int handle; 

}; 

FILE __stdout;       
//定义_sys_exit()以避免使用半主机模式    
_sys_exit(int x) 
{ 
	x = x; 
} 
//重定义fputc函数 
int fputc(int ch, FILE *f)
{      
	while((USART1->SR&0X40)==0);//循环发送,直到发送完毕   
    USART1->DR = (u8) ch;      
	return ch;
}
#endif 

/*使用microLib的方法*/
 /* 
int fputc(int ch, FILE *f)
{
	USART_SendData(USART1, (uint8_t) ch);

	while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}	
   
    return ch;
}
int GetKey (void)  { 

    while (!(USART1->SR & USART_FLAG_RXNE));

    return ((int)(USART1->DR & 0x1FF));
}
*/
 

void uart_init(u32 bound){
  //GPIO端口设置
  GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);	//使能USART1，GPIOA时钟
  
	//USART1_TX   GPIOA.9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出
  GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9
   
  //USART1_RX	  GPIOA.10初始化
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
  GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10  

  //Usart1 NVIC 配置
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ;//抢占优先级3
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;		//子优先级3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQ通道使能
	NVIC_Init(&NVIC_InitStructure);	//根据指定的参数初始化VIC寄存器
  
   //USART 初始化设置

	USART_InitStructure.USART_BaudRate = bound;//串口波特率
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
	USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
	USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//收发模式

  USART_Init(USART1, &USART_InitStructure); //初始化串口1
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
	 USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
  USART_Cmd(USART1, ENABLE);                    //使能串口1 

}


void uart3_init(u32 bound)
{

  USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);	//使能USART3，
 	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
//  GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);//设置端口部分重映射 功能
	/* Enable the USART1 Interrupt */
	NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;       // 通道设置为串口3中断
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority	= 2	;  // 抢占优先级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;	   // 中断响应优先级0
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;		   // 打开中断
	NVIC_Init(&NVIC_InitStructure); 
	
	
	  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PB10
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出
    GPIO_Init(GPIOB, &GPIO_InitStructure); //初始化PB10
   
    //USART3_RX	  PB.11
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
    GPIO_Init(GPIOB, &GPIO_InitStructure);  //初始化PB11
		
	/* 第4步：配置USART3参数
	- BaudRate = 115200 baud
	- Word Length = 8 Bits
	- One Stop Bit
	- No parity
	- Hardware flow control disabled (RTS and CTS signals)
	- Receive and transmit enabled
	*/
	USART_InitStructure.USART_BaudRate = bound;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No   ;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_Init(USART3, &USART_InitStructure);
	USART_Cmd(USART3,ENABLE);//  使能U3
	//USART_IT_IDLE
	 USART_ITConfig(USART3, USART_IT_IDLE, ENABLE);
  USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); //   接收中断使能

}

void uart2_init(u32 bound)
{
	
    GPIO_InitTypeDef GPIO_InitStructure;
	  USART_InitTypeDef USART_InitStructure;
	  NVIC_InitTypeDef NVIC_InitStructure;
	 
	  RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);	//使能USART2，GPIOA时钟
 	  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,  ENABLE);	
		
	//	USART_DeInit(USART2);  //复位串口2
	 //USART2_TX   PA.2
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //PA.2
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//复用推挽输出
    GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA2
   
    //USART2_RX	  PA.3
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
    GPIO_Init(GPIOA, &GPIO_InitStructure);  //初始化PA3

   //USART 初始化设置

	  USART_InitStructure.USART_BaudRate = bound;//一般设置为9600;
	  USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
	  USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
	  USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
	  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
	  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//收发模式

    USART_Init(USART2, &USART_InitStructure); //初始化串口2
		
//		NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
	  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ;//抢占优先级0
	  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;		//子优先级2
	  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQ通道使能
	  NVIC_Init(&NVIC_InitStructure);	//根据指定的参数初始化VIC寄存器

	   USART_ITConfig(USART2, USART_IT_IDLE, ENABLE);
    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启中断
    USART_Cmd(USART2, ENABLE);                    //使能串口 
}
void USART2_SendByte(u8 data)
{
	
	      while((USART2->SR&0X40)==0);//循环发送,直到发送完毕   
      USART2->DR = (u8) data;    
}
/****************************************************
 *  函数名称	：void String_Sub(char *pcBuf, char *pcRes,char *pStart,char *pEnd)
 *	函数功能	: 获取两个特殊字符串之间的字符串  NB-iot数据解析用
 *	编写日期	：2019/7/26
 *	编写人  ：小浩电子科技
 *  参数    ； *pcBuf 源字符串  *pcRes目标字符串 *pStart字符串1   *pEnd字符串2
 *	版本记录	：V1.0	
 *              : 
 ****************************************************/
char String_Sub(char *pcBuf, char *pcRes,const char *pStart,const char *pEnd)
{
	
	char *pcBegin = NULL;
	char *pcEnd = NULL;
	pcBegin = strstr((char*)pcBuf,pStart);
	pcEnd   = strstr((char*)pcBegin+strlen(pStart)+1, pEnd);
	if(pcBegin == NULL || pcEnd == NULL || pcBegin > pcEnd) 
	{
        return 0;//错误返回
	}
	else
	{
		pcBegin += strlen(pStart);
	//	memcpy(pcRes, pcBegin, pcEnd-pcBegin);//内存拷贝法
		strncpy(pcRes, pcBegin, pcEnd-pcBegin);//开始拷贝数据
//        pcRes[(pcEnd-pcBegin)+1]='\0';
	}
    return 1;
}

//   往串口发送字符串
void UsartSendData(u8 *p,char len)
{
	      while(len--)
				{
          while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);
          USART_SendData(USART1, *p++);
				}
}


void USART1_IRQHandler(void)                	//串口1中断服务程序
{
	 	  u8 Res=0,rxes;
	  if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //接收中断
		{
	    	Res =USART_ReceiveData(USART1);	//读取接收到的数据
		if(Usart1ReadCnt < Usart1ReadLen-1)
		{
			Usart1ReadBuff[Usart1ReadCnt] = Res;
		}
		else
		{
			Usart1ReadCnt=0;
		}
		Usart1ReadCnt ++;	//数据个数
		
	}
 if(USART_GetITStatus(USART1, USART_IT_IDLE) != RESET)//空闲中断 
	{
		//用读SR和DR的方法清除IDLE
		rxes = USART1->SR;
		rxes = USART1->DR;
	//	analyse_data();
		Usart1ReadCnt=0;
	}
	

} 

void USART2_IRQHandler(void)                	//串口1中断服务程序
{
	 	  u8 Res=0,rxes;
	  if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)  //接收中断
		{
	    	Res =USART_ReceiveData(USART2);	//读取接收到的数据
		if(Usart2ReadCnt < Usart2ReadLen-1)
		{
			Usart2ReadBuff[Usart2ReadCnt] = Res;
		}
		else
		{
			Usart2ReadCnt=0;
		}
		Usart2ReadCnt ++;	//数据个数
		
	}
 if(USART_GetITStatus(USART2, USART_IT_IDLE) != RESET)//空闲中断 
	{
		//用读SR和DR的方法清除IDLE
		rxes = USART2->SR;
		rxes = USART2->DR;
	//	analyse_data();
		Usart2ReadCnt=0;
	}
	

} 

void USART3_IRQHandler(void)                	//串口1中断服务程序
{
	 	  u8 Res=0,rxes;
	  if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)  //接收中断
		{
	    	Res =USART_ReceiveData(USART3);	//读取接收到的数据
		if(Usart3ReadCnt < Usart3ReadLen-1)
		{
			Usart1ReadBuff[Usart3ReadCnt] = Res;
		}
		else
		{
			Usart3ReadCnt=0;
		}
		Usart3ReadCnt ++;	//数据个数
		
	}
 if(USART_GetITStatus(USART3, USART_IT_IDLE) != RESET)//空闲中断 
	{
		//用读SR和DR的方法清除IDLE
		rxes = USART3->SR;
		rxes = USART3->DR;
	//	analyse_data();
		Usart3ReadCnt=0;
	}
	

}