lpc_lib_uart.c

使用embest IDE开发工具开发的基于LPC2294 的触摸屏开发

/***********************************************************************

       Embest Info&Tech Co., Ltd.  All rights reserved.
                    www.embedinfo.com
file     : 
author   : z.x.q. embest 
establish: 2006.4
modify	 :
notes    :
***********************************************************************/


/*-------------------------------------------------------------------*/
/*                       include files                               */
/*---------------------------------------------------------------- --*/


#include	"..\..\com\lpc_lib_uart\lpc_lib_uart.h"


/*-------------------------------------------------------------------*/
/*                       local function declare                      */
/*-------------------------------------------------------------------*/



/*-------------------------------------------------------------------*/
/*              extern function/variable declare                     */
/*-------------------------------------------------------------------*/



/*-------------------------------------------------------------------*/
/*                      global variable define                       */
/*-------------------------------------------------------------------*/



/*-------------------------------------------------------------------*/
/*                       function code                               */
/*-------------------------------------------------------------------*/

/*************initialize uart0,set baurate***************************/
void uart0_init(INT32U BaudRate)
{
	INT16U udiv;
	INT32U i;
		
	i=PINSEL0;						//select the pin to uart0
	i&=(~P0_UART0_PINSEL0_MASK);
	i|=P0_UART0_PINSEL0;
	PINSEL0=i;

	UART0_IER=0x0;  				//disable all interrupts
	UART0_FCR=0x0;					//disable FIFO
	UART0_LCR=0x80;					// enable DLAB
	
	udiv=(PCLKF>>4)/BaudRate;		//compute the baud division
	UART0_DLM = udiv>>8;		 
	UART0_DLL = udiv&0xff;		
	UART0_LCR = 0x03;				//set the data format
	i=UART0_RBR;					//clear the Recive buffer
	spi_extend_set(0,module_c_U0_EN);	//open the uart0 module latch	

}
	
/*****************send byte to hyperterminal once********************/
void uart0_sendch(INT8U data)
{		
	if(data=='\n')					//if data is '\n',change line and to begin of the line		
	uart0_sendch('\r');			  	
	UART0_THR=data;
	while ((UART0_LSR&0x20)==0);	//wait the THR for empty
}


/****************send string to hyperterminial *********************/
void uart0_sendstr(INT8U *str)
{
	while(*str)           			//till equal to zero
	uart0_sendch(*str++);
}


/*******************get byte from hyperterminal*********************/
INT8U uart0_getch(void)
{

	while((UART0_LSR&0x01)==0);		// wait recive data ready
	return UART0_RBR;
}

INT8U uart0_getkey(void)
{
	if((UART0_LSR&0x01)!=0)
		return UART0_RBR;
	else
		return 0;
}

/********************get string from hyperterminal******************/
/*desc: get char from uart0 byte by byte, every time get a byte and 
		then send out it till 'enter' key input,all the bytes converge
		to a string,store to the char point 'str'!
********************************************************************/
void uart0_getstr(INT8U *str)
{
	INT8U *string=str;
	INT8U c;
	c=uart0_getch();	
	
	while(c!='\r')
	{
		if((c=='\b')&&((INT32U)string<(INT32U)str))
		{
			uart0_sendch('\b');
			uart0_sendch(' ');
			uart0_sendch('\b');
			str--;	
		}
		else
		{
			uart0_sendch(c);
			*str++=c;
		}
		c=uart0_getch();
	}
	*str='\0';
	uart0_sendch('\n');
}


/************************print main function**************************/
void uart0_printf(INT8U *fmt,...)
{
    va_list ap;
    INT8U string[128];
    va_start(ap,fmt);		 		//correspond to va_end func
    vsprintf(string,fmt,ap); 		//variable function
    uart0_sendstr(string);
    va_end(ap);
}

void uart0_close(void)
{
	spi_extend_set(1,module_c_U0_EN);
}
/*
---------------------------------------------------------------------------
			uart1 library
---------------------------------------------------------------------------	
*/	
	
void uart1_init(INT32U BaudRate)
{
	INT16U udiv;
	INT32U i;
		
	i=PINSEL0;						//select the pin to uart0
	i&=(~P0_UART1_PINSEL0_MASK);
	i|=P0_UART1_PINSEL0;
	PINSEL0=i;

	UART1_IER=0x0;  				//disable all interrupts
	UART1_FCR=0x0;					//disable FIFO
	
	UART1_LCR=0x80;					// enable DLAB	
	udiv=(PCLKF>>4)/BaudRate;		//compute the baud division
	UART1_DLM = udiv>>8;		 
	UART1_DLL = udiv&0xff;		
	UART1_LCR = 0x03;				//set the data format
	i=UART1_RBR;					//clear the Recive buffer

	spi_extend_set(0,module_c_U1_EN);	//open the uart0 module latch

}

void uart1_sendch(INT8U data)
{		
	if(data=='\n')					//if data is '\n',change line and to begin of the line		
	uart1_sendch('\r');			  	
	UART1_THR=data;
	while ((UART1_LSR&0x20)==0);	//wait the THR for empty
}

INT8U uart1_getch(void)
{

	while((UART1_LSR&0x01)==0);		// wait recive data ready
	return UART1_RBR;
}
INT8U uart1_getkey(void)
{
	if(UART1_LSR&0x01)
		return UART1_RBR;
	else
		return 0;
}
void uart1_close(void)
{
	spi_extend_set(1,module_c_U1_EN);
}