HS121L/USER/Serial.c

/*******************************************************************************************
 * File Name: Serial.c
 * Function Describe:device for serial	
 * Relate Module:
 * Explain:
	接收采用中断方式
	UART1: 连接尾插，用于与PC相连	  另外，printf映射到UART1
	UART2: 连接GPS
	UART3: 连接Modem
	全局变量g_ucUARTSel 调试选择控制，决定了3个串口的转发关系,其值通过以下3个宏控分别代表：
	COM_SEL_MCU   正常使用不转发,尾插用于MCU打印LOG或 MCU软件升级
	COM_SEL_GPS	  UART1<-->UART2,尾插用于GPS LOG打印
	COM_SEL_MODEM UART1<-->UART3,尾插用于MODEM AT momand 或模块软件升级
 * Writer:  ShiLiangWen
 * Date:	2015.1.20
********************************************************************************************/
#define THIS_FILE_ID 4
/* Includes ------------------------------------------------------------------*/
#include "includes.h"


#define USART1_DR_Base  0x40013804   
#define USART2_DR_Base  0x40004404 
#define USART3_DR_Base (u32)&USART3->DR 

unsigned char g_ucUARTSel=0;//0--MCU  1--Modem  2--GPS
unsigned char g_ucUART1RxMode=0;
//UART1 Trace
unsigned char RxBuffer1[UART1_RX_BUFFER_SIZE];
static unsigned short rx1_ct;
unsigned short g_usUart1RecvLen;
unsigned char g_ucUart1Sending;

//UART2 用于与MODEM通讯
unsigned char RxBuffer2[UART2_RX_BUFFER_SIZE];
static unsigned short rx2_ct;
unsigned short g_usRx2Len;
unsigned short g_usRx2In;
unsigned short g_usRx2Out;
unsigned char g_ucUart2Sending;

//UART3 用于与GPS
unsigned char RxBuffer3[UART3_RX_BUFFER_SIZE];
unsigned short g_usRx3Len;
unsigned short rx3_ct;

/*********************************************************************************************
*UART2RxTxISRHandler
*串口2中断处理函数
**********************************************************************************************/

void UART2RxTxISRHandler(void)
{
	__IO unsigned char uart_data;
	//----接收中断--------
	if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
	{
		uart_data = USART_ReceiveData(USART2); // Read one byte from the receive data register
		//Modem Trace
		if(g_ucUARTSel==COM_SEL_MODEM){
			USART_SendData(USART1, uart_data);
			USART_ClearITPendingBit(USART2,  USART_IT_RXNE);  //清除中断标志 
			return;
		}
		if(g_ucUARTSel==COM_SEL_GPS){
			USART_SendData(USART1, uart_data);
			USART_ClearITPendingBit(USART2,  USART_IT_RXNE);  //清除中断标志 
			return;
		}
		//MCU 处理Modem
		if(g_usRx2Len<UART2_RX_BUFFER_SIZE){
			RxBuffer2[g_usRx2In]=uart_data;
			if(++g_usRx2In>=UART2_RX_BUFFER_SIZE)g_usRx2In=0;
			g_usRx2Len++;
		}
		isr_sem_send(&ModemUartSem);
		USART_ClearITPendingBit(USART2,  USART_IT_RXNE);  //清除中断标志 

	}
	if(USART_GetFlagStatus(USART2,USART_FLAG_ORE)==SET)
	{
		USART_ReceiveData(USART2);    //
		USART_ClearFlag(USART2,USART_FLAG_ORE); // 
	}
	
}

void UART3RxTxISRHandler(void)
{
	uint16_t i = 0;
	__IO unsigned char uart_data;
	__IO static unsigned char uart_last_data=0;
	if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET){
		uart_data = USART_ReceiveData(USART3);
		if(g_ucUARTSel==COM_SEL_GPS){
			USART_SendData(USART1, uart_data);	
		}else if(0==g_usRx3Len){
			RxBuffer3[rx3_ct]= uart_data;
			if(RxBuffer3[0]!='$')rx3_ct=0;
			else rx3_ct++;
			
			if(rx3_ct>=(UART3_RX_BUFFER_SIZE-1))rx3_ct=0;
			
			if(uart_last_data==0x0d && uart_data==0x0a){ //收到回车换行符
				if(RxBuffer3[1]=='G' && RxBuffer3[3]=='R' && RxBuffer3[5]=='C'){//$GPRMC
					//Send message
					RxBuffer3[rx3_ct-1]=0;
					g_usRx3Len=rx3_ct;
				}else{
					rx3_ct=0;
				}
				
			}
				
		}else{
			rx3_ct=0;
		}		
		USART_ClearITPendingBit(USART3,  USART_IT_RXNE);  //Clean interrupt flag	
		uart_last_data=uart_data;
	} 
	
	if(USART_GetFlagStatus(USART3,USART_FLAG_ORE)==SET)
	{
		USART_ReceiveData(USART3);    //
		USART_ClearFlag(USART3,USART_FLAG_ORE); // 
	}
}

 /**********************************************************************
+CSQ:1/r/n 最少8字节
+POC:83000
+ZIPRECV:
+ZIPRECVU:
+ZIPSTATUS:
************************************************************************/
void Uart2RecvProcess(void)
{
  unsigned short Rx2Len;
	unsigned short out;
	char preData[20];
	unsigned short i,j,len;
	char num[5];
	char data,flag;
	//少于8字节不处理
	if(g_usRx2Len<8)return;
	//缓冲区满，清空缓冲区
	if(g_usRx2Len>(UART2_RX_BUFFER_SIZE-2)){
		USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
		g_usRx2In=0;
		g_usRx2Len=0;
		g_usRx2Out=0;
		USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
		SlwTrace(DEBUG,"[Rx2Buf Over]",1); 
		return;
	}
	//锁定环形缓冲区当前状态，
	Rx2Len=g_usRx2Len;
	
//	USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);
//	g_usRx2Len=g_usRx2Len-i;
//	USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
	
	//少于8字节不处理
	if(Rx2Len<4)return;
	//预读取前n字节 n最少4，最大16 为后续处理提供条件
	if(Rx2Len<16)len=Rx2Len;
	else len=16;
	out=g_usRx2Out;
	for(i=0;i<len;i++){
		preData[i]=RxBuffer2[out];
		if(++out>UART2_RX_BUFFER_SIZE)out=0;
	}
	RunMake(THIS_FILE_ID);
	//判断是否为OK

	//判断前8字节是否等于"+ZIPRECV"，如果等于则特殊处理，如果不等则找到"/r/n"作为结束符
	if(0!=ModemStrCmp(preData,"+TCPRECV"))
	{
		//非"+TCPRECV",则直接找到最近的0x0A作为结束符，读取并形成一包消息
		out=g_usRx2Out;
		for(i=0;i<Rx2Len;i++)
	  {
			if(RxBuffer2[out]==0x0A)break;
			if(++out>=UART2_RX_BUFFER_SIZE)out=0;
		}
		//123/n/0
		if(i<Rx2Len)
		{//找到了0x0A，从环形缓冲区中读取数据并拷贝到消息缓冲区，发送消息
			len=i+1;//消息长度
			RunMake(THIS_FILE_ID);
			if(len<(MODEM_AT_MSG_DATA_LEN-2))
			{
				sutAtm.MsgLen=len;
				for(i=0;i<len;i++)
				{
					sutAtm.MsgData[i]=RxBuffer2[g_usRx2Out];
					if(++g_usRx2Out>=UART2_RX_BUFFER_SIZE)g_usRx2Out=0;
				}
				sutAtm.MsgData[i]=0;//消息最后补0作为结束符，方便打印
				//更新g_usRx3Len，需要防止中断修改冲突
				USART_ITConfig(USART2, USART_IT_RXNE, DISABLE); //DISABLE UART3 RX IT
				g_usRx2Len=g_usRx2Len-len;
				USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); //ENABLE UART3 RX IT
				RunMake(THIS_FILE_ID);
				//发送消息
				sutAtm.MsgLen+=1;
				if(0 != MsgQueuePost(sutAtm.MsgData,sutAtm.MsgLen)) SlwTrace(INF, "MQueue Full1",1);
				return;
			}else
			{//消息队列的内存块长度不够，需要特殊处理,扔掉后面部分
				sutAtm.MsgLen=len;
				for(i=0;i<len;i++)
				{
					data=RxBuffer2[g_usRx2Out];
					if(i<(MODEM_AT_MSG_DATA_LEN-2))sutAtm.MsgData[i]=data;
					if(++g_usRx2Out>=UART2_RX_BUFFER_SIZE)g_usRx2Out=0;
				}
				sutAtm.MsgData[MODEM_AT_MSG_DATA_LEN-1]=0;//消息最后补0作为结束符
			//更新g_usRx3Len，需要防止中断修改冲突
				USART_ITConfig(USART2, USART_IT_RXNE, DISABLE); //DISABLE UART2 RX IT
				g_usRx2Len=g_usRx2Len-len;
				USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); //ENABLE UART2 RX IT
				RunMake(THIS_FILE_ID);
				//发送消息
				if(0 != MsgQueuePost(sutAtm.MsgData,sutAtm.MsgLen)) SlwTrace(INF, "MQueue Full2",1);
				return;
			}
		}
		return;
	}
	//+TCPRECV:1,24,12
	if(Rx2Len<16)return;//最少16字节“+TCPRECV:0,1,d\r\n”
	out=g_usRx2Out;
	flag=0;//找到','的标志
	j=0;//用来存储xxx的下标，xxx范围"1" -> "9999"
	for(i=0;i<Rx2Len;i++){
		data=RxBuffer2[out];
		if(','==data){
			if(flag<1)flag++;
			else break;
		}else if(flag==1 && j<4){
			num[j++]=data;
		}
		if(++out>=UART2_RX_BUFFER_SIZE)out=0;
	}
	if(i>=Rx2Len){//未找到了2个','则直接忽略
		//SlwTrace(DEBUG,"<2<\r\n");
		return;
	}
	RunMake(THIS_FILE_ID);
	//找到了2个',' 计算xxx长度
	num[j]=0;
	len=atoi(num);
	if(len<10)j=1;
	else if(len<100)j=2;
	else if(len<1000)j=3;
	else j=4;
	len=len+j+14;
	if(Rx2Len<len){
		return;//长度不够，忽略
	}
	//长度够，产生消息
	if(len<(MODEM_AT_MSG_DATA_LEN-2)){
		sutAtm.MsgLen=len;
		for(i=0;i<len;i++){
			sutAtm.MsgData[i]=RxBuffer2[g_usRx2Out];
			if(++g_usRx2Out>=UART2_RX_BUFFER_SIZE)g_usRx2Out=0;
		}
		sutAtm.MsgData[i]=0;//消息最后补0作为结束符，方便打印
		//更新g_usRx3Len，需要防止中断修改冲突
		USART_ITConfig(USART2, USART_IT_RXNE, DISABLE); //DISABLE UART3 RX IT
		g_usRx2Len=g_usRx2Len-len;
		USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); //ENABLE UART3 RX IT
		//发送消息
		sutAtm.MsgLen +=1;
		if(0 != MsgQueuePost(sutAtm.MsgData,sutAtm.MsgLen)) SlwTrace(INF, "MQueue Full3",1);
	}else{
		sprintf(preData,"AtMsgBuf Over [%u]",i);
		SlwTrace(INF,preData,1);
		return;
	}

	RunMake(THIS_FILE_ID);
}
void Uart1Send(char *txbuf,int len)
{
	int i;
	for(i=0;i<len;i++){
		USART_SendData(USART1,txbuf[i]);
		while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);	
	}
}
void Uart2Send(unsigned char *txbuf,int len)
{
	int i;
	for(i=0;i<len;i++){
		USART_SendData(USART2,txbuf[i]);
		while (USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET);	
	}
}

/*********************************************************************************************
*UART1RxTxISRHandler
*串口1中断处理函数
**********************************************************************************************/
void UART1RxTxISRHandler(void)
{
	__IO unsigned char uart_data;
	__IO static unsigned char uart_last_data=0;
	char *p;
	unsigned char i;
	uint32_t temp = 0;
	//----接收中断--------
	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
	{
		uart_data = USART_ReceiveData(USART1);
		USART_ClearITPendingBit(USART1,  USART_IT_RXNE);  //清除中断标志
		
		if(g_ucUARTSel==COM_SEL_MODEM){//Modem Trace
			USART_SendData(USART2, uart_data);
		}else if(g_ucUARTSel==COM_SEL_GPS){//GPS Trace
			USART_SendData(USART3, uart_data);	
		}else{
			if(g_usUart1RecvLen==0)
			{
				RxBuffer1[rx1_ct++]=uart_data;
				if(rx1_ct >= UART1_RX_BUFFER_SIZE) rx1_ct=0;
				if(rx1_ct>=2)
				{
					if(uart_last_data=='\r' && uart_data == '\n')
					{
						g_usUart1RecvLen=rx1_ct;
						rx1_ct=0;
					}
				}
				uart_last_data=uart_data;
			}
		}
	}
	//---异常中断---
	if(USART_GetFlagStatus(USART1,USART_FLAG_ORE)==SET)
	{
		USART_ReceiveData(USART1);    //
		USART_ClearFlag(USART1,USART_FLAG_ORE); // 
	}
}

/*******************************************************************************
Uart1Init
Use for Trace 
*******************************************************************************/
void Uart1Init(void)
{ 
	NVIC_InitTypeDef NVIC_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure; 

	RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1,ENABLE);
	/*
	*  USART1_TX -> PA9 , USART1_RX ->	PA10
	*/				
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;	         
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
	GPIO_Init(GPIOA, &GPIO_InitStructure);		   

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;	        
	GPIO_InitStructure.GPIO_Mode =GPIO_Mode_IN_FLOATING;// GPIO_Mode_IPU;//GPIO_Mode_IN_FLOATING;  
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	USART_InitStructure.USART_BaudRate =115200;// 115200;
	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_Tx;
	USART_Init(USART1, &USART_InitStructure); 
	USART_Cmd(USART1, ENABLE);

	USART_ClearFlag(USART1,USART_FLAG_TC);
	USART_ITConfig(USART1, USART_IT_TXE,  DISABLE); //ENABLE DISABLE
	USART_ITConfig(USART1, USART_IT_RXNE, DISABLE); //ENABLE DISABLE
	USART_ITConfig(USART1, USART_IT_IDLE, DISABLE);	//USART_IT_IDLE USART_IT_RXNE
	
	rx1_ct=0;
	g_usUart1RecvLen=0;
	g_ucUart1Sending=0;
	g_ucUART1RxMode=0;
}
void Uart1RxEnable(int en)
{
	static unsigned char sucEn=0;
	USART_InitTypeDef USART_InitStructure; 
	if(sucEn!=en)sucEn=en;
	else return;
	
	USART_DeInit(USART1);
	if(en){//使能串口1发送与接收，非DMA
		USART_InitStructure.USART_BaudRate =115200;// 115200;
		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(USART1, &USART_InitStructure); 
		USART_Cmd(USART1, ENABLE);
		USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);	
		USART_ITConfig(USART1, USART_IT_IDLE, DISABLE);	
	}else{//使能串口1发送非DMA
		USART_InitStructure.USART_BaudRate =115200;// 115200;
		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_Tx;// 
		USART_Init(USART1, &USART_InitStructure); 
		USART_Cmd(USART1, ENABLE);
		USART_ITConfig(USART1, USART_IT_IDLE|USART_IT_RXNE, DISABLE);	//USART_IT_IDLE USART_IT_RXNE
	}
}

/***************************************************************************
Uart2Init
****************************************************************************/
void Uart2Init(void)
{
	NVIC_InitTypeDef NVIC_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure; 

	/*使能串口2使用的GPIO时钟*/
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
	/*使能串口2时钟*/
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);  
          
	/*串口2 RX管脚配置*/
	/* Configure USART3 Rx as input floating */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//GPIO_Mode_IN_FLOATING;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);  

	/*串口2 TX管脚配置*/ 
	/* Configure USART2 Tx as alternate function push-pull */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//GPIO_Mode_AF_PP;
	GPIO_Init(GPIOA, &GPIO_InitStructure);  

	USART_InitStructure.USART_BaudRate = 115200;
	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(USART2, &USART_InitStructure); 

	
	USART_ClearFlag(USART2,USART_FLAG_TC);
	USART_ITConfig(USART2, USART_IT_TXE,  DISABLE); //ENABLE DISABLE
	USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); //ENABLE DISABLE
	USART_ITConfig(USART2, USART_IT_IDLE, DISABLE);//USART_IT_IDLE USART_IT_RXNE
	
	USART_ITConfig(USART2, USART_IT_PE, ENABLE);   
  USART_ITConfig(USART2, USART_IT_ERR, ENABLE);

	USART_Cmd(USART2, ENABLE);
	
	rx2_ct=0;
	g_usRx2Len=0;
	g_usRx2In=0;
	g_usRx2Out=0;
	g_ucUart2Sending=0;
	memset(RxBuffer2,0,sizeof(RxBuffer2));
}


/***********************************************************************************
*
************************************************************************************/
void SlwTrace(TRACE_TYPE type,char *buf,char needEnd)
{
	if(type==DEBUG)return;
	if(g_ucUARTSel!=COM_SEL_MCU)return;

	Uart1Send(buf,strlen(buf));
	if(needEnd!=0) Uart1Send("\r\n",2);
}

/*******************************************************************************
ComSelect
调试口选择
#define COM_SEL_MCU 	0
#define COM_SEL_GPS 	1
#define COM_SEL_MODEM 	2
*******************************************************************************/
void ComSelect(unsigned char sel)
{
	switch(sel)
	{
		case COM_SEL_MCU:
			SlwTrace(INF,"COM<-->MCU!",1);
			os_dly_wait(10);
			g_ucUARTSel=sel;
			USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); 
			USART_ITConfig(USART1, USART_IT_IDLE, DISABLE);
			break;
		case COM_SEL_GPS:
			GPSRestart();
			SlwTrace(INF,"COM<-->Modem_GPS!",1);
		  os_dly_wait(10);
			g_ucUARTSel=sel;
			USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //ENABLE DISABLE
			USART_ITConfig(USART1, USART_IT_IDLE, DISABLE);	//USART_IT_IDLE USART_IT_RXNE
			
			USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); //ENABLE DISABLE
			USART_ITConfig(USART3, USART_IT_IDLE, DISABLE);	//USART_IT_IDLE USART_IT_RXNE
			break;
		case COM_SEL_MODEM:
			SlwTrace(INF,"COM<-->Modem!",1);
			os_dly_wait(10);
			g_ucUARTSel=sel;
			USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //ENABLE DISABLE
			USART_ITConfig(USART1, USART_IT_IDLE, DISABLE);	//USART_IT_IDLE USART_IT_RXNE
			
			USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); //ENABLE DISABLE
			USART_ITConfig(USART2, USART_IT_IDLE, DISABLE);	//USART_IT_IDLE USART_IT_RXNE
			break;
	}
}

void Uart3Init(void)
{//GPS
	NVIC_InitTypeDef NVIC_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure; 

	/*使能串口2使用的GPIO时钟*/
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
	/*使能串口2时钟*/
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);  
	/*串口2 RX管脚配置*/
	/* Configure USART3 Rx as input floating */
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;//GPIO_Mode_IN_FLOATING;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure); 

	USART_InitStructure.USART_BaudRate = 9600;
	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_Init(USART3, &USART_InitStructure); 

	
	USART_ClearFlag(USART3,USART_FLAG_TC);
	USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
	USART_ITConfig(USART3, USART_IT_IDLE | USART_IT_TXE, DISABLE);

	USART_Cmd(USART3, ENABLE);
	
	memset(RxBuffer3,0,sizeof(RxBuffer3));
	g_usRx3Len=0;
}

/**************************************************************************
* USART1_SendOK_IQ
* 串口1发送数据完毕后，会调用的中断函数，将发送标志置0
* 此函数需在stm32f10x_it.c 的 DMA1_Channel4_IRQHandler()中被调用
***************************************************************************/
void USART1_SendOK_IQ(void)
{
	//判断是否为DMA发送完成中断
	if(DMA_GetFlagStatus(DMA1_FLAG_TC4)==SET) 
	{  
        DMA_ClearITPendingBit(DMA1_IT_GL4);
        DMA_ClearFlag(DMA1_FLAG_TC4);
        DMA_Cmd (DMA1_Channel4,DISABLE);
        g_ucUart1Sending = 0; //数据发送完毕       											 
	}      
	//printf("USART1_SendOK_IQ\r\n");
}
/**************************************************************************
* USART2_SendOK_IQ
* 串口2发送数据完毕后，会调用的中断函数，将发送标志置0
* 此函数需在stm32f10x_it.c 的 DMA1_Channel7_IRQHandler()中被调用
***************************************************************************/
void USART2_SendOK_IQ(void)
{
	//判断是否为DMA发送完成中断
	if(DMA_GetFlagStatus(DMA1_FLAG_TC7)==SET) 
	{  
        DMA_ClearITPendingBit(DMA1_IT_GL7);
        DMA_ClearFlag(DMA1_FLAG_TC7);
        DMA_Cmd (DMA1_Channel7,DISABLE);
        g_ucUart2Sending = 0; //数据发送完毕       											 
	}      
}


#ifdef __GNUC__
  /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
     set to 'Yes') calls __io_putchar() */
  #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
  #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */


/**
  * @brief  Retargets the C library printf function to the USART.
  * @param  None
  * @retval None
  */
PUTCHAR_PROTOTYPE
{
  /* Place your implementation of fputc here */
  /* e.g. write a character to the USART */
  USART_SendData(USART1, (uint8_t) ch);

  /* Loop until the end of transmission */
  while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
  {}

  return ch;
}