www.pudn.com > USBdiskRW.rar > serial.c

#include "def.h" 
#include "44b.h" 
#include "option.h" 
#include "utils.h" 
 
static U16 SerialPortSel; 
 
U16 SerialSwitch(U16 port) 
{ 
#ifdef	SERIAL_PORTS_SWITCH 
//	U16 old_sel = SerialPortSel; 
 
	SerialPortSel = port?1:0; 
#else 
	SerialPortSel = 0; 
#endif 
	return SerialPortSel; 
} 
 
void SerialChgBaud(U32 baud) 
{ 
	U32 mclk =  GetMasterClock(); 
	 
	rUFCON0 = 0x0;		//FIFO disable 
	rUFCON1 = 0x0; 
	rUMCON0 = 0x0; 
	rUMCON1 = 0x0; 
//UART0 
//	rULCON0  = 0x7;		//Normal,No parity,2 stop,8 bit 
	rULCON0  = 0x3;		//Normal,No parity,1 stop,8 bit 
	rUCON0   = 0x245;	//rx=edge,tx=level,disable timeout int.,enable rx error int.,normal,interrupt or polling 
	rUBRDIV0 = ((int)(mclk/16./baud + 0.5) -1); 
//UART1 
//	rULCON1  = 0x7;		//Normal,No parity,2 stop,8 bit 
	rULCON1  = 0x3; 
	rUCON1   = 0x245; 
	rUBRDIV1 = ((int)(mclk/16./baud + 0.5) -1); 
} 
 
void SerialTxEmpty(void) 
{ 
//	if(SerialPortSel) 
		while(!(rUTRSTAT1 & 0x4)); //wait until tx shifter is empty. 
//	else 
		while(!(rUTRSTAT0 & 0x4)); //wait until tx shifter is empty. 
 
} 
 
void SerialTxChar(char data) 
{ 
	if(SerialPortSel) { 
		if(data=='\n') { 
			while(!(rUTRSTAT1 & 0x2)); 
	    	Delay(1);	//because the slow response of hyper_terminal  
			WrUTXH1('\r'); 
		} 
		while(!(rUTRSTAT1 & 0x2)); //Wait until THR is empty. 
//		Delay(1); 
		WrUTXH1(data); 
    } else { 
		if(data=='\n') { 
			while(!(rUTRSTAT0 & 0x2)); 
			Delay(1);	//because the slow response of hyper_terminal  
			WrUTXH0('\r'); 
		} 
		while(!(rUTRSTAT0 & 0x2));  //Wait until THR is empty. 
//		Delay(1); 
		WrUTXH0(data); 
    } 
} 
 
int SerialRxReady(void) 
{ 
	if(SerialPortSel) 
		return (rUTRSTAT1 & 0x1);	//Receive data ready 
	else  
		return (rUTRSTAT0 & 0x1);	//Receive data ready 
} 
 
char SerialRxKey(void) 
{ 
	if(SerialPortSel) { 
		if((rUTRSTAT1 & 0x1)) //Receive data ready 
			return RdURXH1(); 
	} else { 
		if((rUTRSTAT0 & 0x1)) //Receive data ready 
			return RdURXH0(); 
	} 
	return 0; 
} 
 
char SerialRxChar(void) 
{ 
	if(SerialPortSel) { 
		while(!(rUTRSTAT1 & 0x1)); //Receive data ready 
		return RdURXH1(); 
	} else { 
		while(!(rUTRSTAT0 & 0x1)); //Receive data ready 
		return RdURXH0(); 
	} 
} 
 
int SerialRxToBuf(char *b) 
{ 
	if(SerialPortSel) { 
		if(rUTRSTAT1 & 0x1)    //Receive data ready 
			*b = RdURXH1(); 
		else 
		    return 0; 
    } else { 
		if(rUTRSTAT0 & 0x1)    //Receive data ready 
		    *b = RdURXH0(); 
		else 
		    return 0; 
    } 
     
    return 1; 
} 
 
void SerialTxString(char *s) 
{ 
	 while(*s) 
		SerialTxChar(*s++); 
} 
 
//***************************************************************************** 
//get a number for the uart 
//***************************************************************************** 
int Uart_GetIntNum_GJ(void) 
{ 
    char string[16] ; 
    char *p_string = string ; 
    char c; 
    int i = 0 ; 
    int data = 0 ; 
 
    while(   (c=SerialRxChar()) != '\r'  ) 
    { 
		if(c=='\b')		p_string--; 
		else		*p_string++=c; 
		 
		SerialTxChar( c ) ; 
    } 
 
    *p_string = '\0'; 
 
	i = 0 ; 
	while( string[i] != '\0' ) 
	{ 
		data = data * 10 ; 
		if( string[i]<'0'||string[i]>'9' ) 
			return -1 ; 
		data = data + ( string[i]-'0' ) ; 
		i++ ;		 
	}	 
	 
	return data ; 
} 
//*****************************************************************************