serial.c

一种51单片机接收电话线上DTMF(拨号DTMF的应用程序)

//初值 = 256-（2SMOD * fosc) / (fx*32*12) 
// 初值 = (2097152*波特率-Fosc)/(波特率*32)
// 1200    FEE0

//extern void callid_close() ;

uchar idata Serial_SendBuf[32] ;
uchar Serial_SendLength= 0 ;
uchar idata Serial_Receive[10] ;
uchar Serial_ReceiveLength = 0 ;
uchar idata Command_status ;
void Serial_Init()
{
//   	TMOD = (TMOD & 0x0f) | 0x20;
//   	TH1 = 0xe8 ;  
//   	TL1 = 0xe8 ;
	T2CON = 0x30 ;
	RCAP2H = 0xfe ;
	RCAP2L = 0xe0 ;
	TH2 = 0xfe ;
	TL2 = 0xe0 ;
	SCON = 0x50 ;
//	PCON = 0 ;
	TR2 = 1 ;
	ET2 = 0 ;
	ES = 1 ;
	PS = 1 ;
	mem_set(Serial_SendBuf,0,32) ;
	mem_set(Serial_Receive,0,10) ;
	Serial_SendLength = 0 ;
	Serial_ReceiveLength = 0 ;
	Command_status = 0 ;
}
void Serial_SendData()
{
	uchar i ;
	
	SBUF= Serial_SendBuf[0] ;
	Serial_SendLength -- ;
	for(i=0;i<Serial_SendLength;i++)
	{
		Serial_SendBuf[i] = Serial_SendBuf[i+1] ;
	}
}
void  Serial_RP_Interrupt() interrupt 4 using 2
{
	uchar rxdata,i ;
	
	EA = 0 ;
	if(TI ==1) 
	{
		TI =0 ;
		if(Serial_SendLength>0)
		{
			SBUF= Serial_SendBuf[0] ;
			Serial_SendLength -- ;
			for(i=0;i<Serial_SendLength;i++)
			{
				Serial_SendBuf[i] = Serial_SendBuf[i+1] ;
			}
		}
	}
	if(RI ==1) 
	{
		RI = 0 ;
		rxdata = SBUF ;
		Serial_Receive[Serial_ReceiveLength] = rxdata ;
		Serial_ReceiveLength ++ ;
		if(Serial_ReceiveLength>=10) Serial_ReceiveLength = 10 ;
		if(rxdata == '#')
		{
			Command_status = 1 ;
		}
	}
	EA = 1 ;
}

void Serial_SendCommand(uchar *Buf,uchar Length) 
{
	uchar i ;
	
	mem_move(Serial_SendBuf,Buf,Length) ;
	Serial_SendLength = Length ;
	Serial_SendData() ;
	i = 0 ;
	while(Serial_SendLength != 0) 
	{
		delay(10) ;
		i++ ;
		if(i>50) Serial_SendLength = 0 ;
	}
}
/*
uchar ATCommand_Analyse()
{
	uchar AT_Type,i;
	
	if((Serial_Receive[0]!='a')&&(Serial_Receive[0] !='A')) return 0;
	if((Serial_Receive[1]!='t')&&(Serial_Receive[1] !='T')) return 0;
	AT_Type = Serial_Receive[2];
	switch(AT_Type)
	{
		case 'a':    //摘机应答
		case 'A':
				SW = 1;
				Phone_ToneCtrl(TRUE) ;
				return 1;
		case 'h':    //挂机
		case 'H':
				SW = 0;
				Phone_ToneCtrl(FALSE) ;
				return 1;
		case 's':   
		case 'S':
				return 1;
		case 'd':     //拨号
		case 'D':
				SW = 1 ;
				delay(500) ;
				for(i = 3; i < Serial_ReceiveLength-1; i++)
				{
//					send_ht9200(8) ;
					delay(130) ;
					send_ht9200(Serial_Receive[i]-0x30) ;
//					delay(130) ;
//					send_ht9200(8) ;
				}
				Phone_ToneCtrl(TRUE) ;
				return 1;
		case '1':
				Phone_ToneCtrl(FALSE) ;
				return 1 ;
		case '2':
				Callid_Ring_time = 0 ;
				return 1 ;
		default:	return 0;
				
	}
	return 0;
}*/