c_lcd.c

三星mcu S3C4510B评估板的原码

/*************************************************************************/
/*                                                                       */
/* FILE NAME                                      VERSION                */
/*                                                                       */
/* source\c_lcd.c                                  1.0                   */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*     DIAGNOSTIC CODE for S3C4510B0                                     */
/*                                                                       */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/* FUNCTIONS : Character LCD 16x2  Initialization and strings            */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*                                                                       */
/* NAME:    Nicolas Park           					 */
/* The last Modification date:  18-April-2002                            */
/* REMARKS:  Created initial version 1.0                                 */
/*                                                                       */
/*                                Copyright (C) 2002 AIJISYSTEM CO.,LTD  */
/*************************************************************************/

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "s3c4510b0.h"
#include "uart.h"
#include "pollio.h"
#include "c_lcd.h"
#include "system.h"

void LCDTest(void) 
{
	Print("\n\r -- Waiting Key in .. ") ;
	Print("\n\r Received Data : ") ;

}

void LTestPutString(char *ptr) 
{
    while(*ptr )
	{
        lPut_byte(*ptr++ );
	WaitLcd(5000);
	}
}


/*
 * Function : LCDInit
 * Description : Initialize LCD 
 */
void LCDInit(void) 
{
	// Initialize EXTDBWTH : 8Byte Operation
	// Initialize EXTACON0 
	EXTDBWTH &= 0xFFCFFFFF ;
	EXTDBWTH |= DSX0 ; 
	EXTACON0 = LTCOS0 | LTACS0 | LTCOH0 | LTACC0 ; 

	// Initialize
	WaitLcd(200) ;

	/* ---
	 * Function Set
	 *     Interface Data Length is : 8 bit
	 *     Display Numer of Line is 2
	 * --- */
	LInstRegWrite((U8)0x38) ; WaitLcd(100) ; 

	/* ---
	 * Display On/Off Control
	 *     Display On
	 *     Cursor Display/off
	 *     Cursor Blink/off
	 * --- */
	LInstRegWrite((U8)0x0c) ; WaitLcd(100) ; 

	/* ---
	 * Clear Display
	 * --- */
	LInstRegWrite((U8)0x01) ; WaitLcd(100) ; 

	/* ---
	 * Cursor or Display Shift
	 *     Shift Left
	 * --- */
	LInstRegWrite((U8)0x18) ; WaitLcd(100) ; 

	/* ---
	 * Entry Mode Set
	 *     Increment DD Ram Address
	 * --- */
	LInstRegWrite((U8)0x06) ; WaitLcd(100) ; 

	ClearLcdDisplay() ;
}

/*
 * Function : LInstRegWrite
 * Description : LCD Control Register Write
 */
void LInstRegWrite(U8 DATA) 
{ 
	U8 *LcdInstWrAddr ;
	LcdInstWrAddr = (U8 *)LINSTWR ;
	*LcdInstWrAddr=  DATA ; 
}

/*
 * Function : LInstRegRead, LDataRegRead
 * Description : LCD Control Register Write
 */
U8 LInstRegRead(void) 
{
	U8 ReadData ;
	ReadData = (U8)LINSTRD ;
	return ReadData ;
}


U8 LDataRegRead(void) 
{
	U8 ReadData ;
	ReadData = (U8)LDATARD ;
	return ReadData ;
}

/*
 * Function : WaitLcd
 * Description : LCD Control Register Write
 */
void WaitLcd(int milisec)
{
	int second ;

	if (!CACHE_ENABLED) second = milisec * 40 ;
	else second = milisec * 200 ;

	while(second--) ;
}

/*
 * Function : LcdBusyCheck
 * Description : Wait Until LCD Busy Flag is Cleared
 */
void LcdBusyCheck(void) 
{
	U8 ReadData ;
	ReadData = (U8)LINSTRD ;
	while (!ReadData) ;
}

/*
 * Function : Mv2LcdLine
 * Description : Move Second LCD Line
 */
void Mv2LcdLine(void)
{
	// Set DD Ram Address to 
	LInstRegWrite((U8)0x0c) ; WaitLcd(100) ; 
	LInstRegWrite((U8)0xA8) ; WaitLcd(100) ; 
}

/*
 * Function : ClearLcdDisplay
 * Description : Clear LCD Displayed Character
 */
void ClearLcdDisplay(void)
{
	LInstRegWrite((U8)0x01) ; WaitLcd(100) ; 
        l2Print("-NBC board v1.0-","Network BaseCamp") ;
	Mv2LcdLine() ; // Change LCD Line to 2'th Line
}


void lPut_byte(U8 DATA) 
{ 
	U8 *LcdDataWrAddr ;
	LcdDataWrAddr = (U8 *)LDATAWR ;
	*LcdDataWrAddr=  DATA ; 
	WaitLcd(3) ; 
}

void lPrint(char *ptr ) 
{
	LInstRegWrite((U8)0x0F) ; WaitLcd(100) ; 
    while(*ptr )
        lPut_byte(*ptr++ );
}

void  l1Print(char *prt) 
{

    LInstRegWrite((U8)0x01) ; WaitLcd(100) ; 
    lPrint(prt) ;
    Mv2LcdLine() ; // Change LCD Line to 2'th Line
}

void  l2Print(char *L1,char *L2) 
{

    LInstRegWrite((U8)0x01) ; WaitLcd(100) ; 
    lPrint(L1) ;
    Mv2LcdLine() ; // Change LCD Line to 2'th Line
    lPrint(L2) ;
}


void lfPrint(char *L2,char *fmt,...)
{
    va_list argptr;
    char temp_buf[LCD_DIGIT_NO];

    va_start(argptr, fmt);
    vsprintf(temp_buf, fmt, argptr);
    LInstRegWrite((U8)0x01) ; WaitLcd(100) ; 
    l2Print(temp_buf,L2);
    va_end(argptr);
}

void LcdUsrModeSet() 
{
	LInstRegWrite((U8)0x30) ; WaitLcd(100) ; 
	LInstRegWrite((U8)0x01) ; WaitLcd(100) ; // Clear
	LInstRegWrite((U8)0x8F) ; WaitLcd(100) ; 
	LInstRegWrite((U8)0x07) ; WaitLcd(100) ; 
}