display.c

LCD及键盘、RS232通信控制源代码、采用keil c51环境编译

/*********************************************************************************
*                                                                                *
*	FileName:	Display.c                                                        *
*	Function:	monitor controller                                               *
*	SystemName:	NDS18000-BSC                                                     *
*	CPU:		ATMEL AT89C52                                                    *
*	Startup:	14/Oct/2002                                                      *
*	Author:		XuYiBo                                                           *
*                                                                                *
*********************************************************************************/
#include <AT89X52.H>

#include "NDSBSCUI.H"
#include "display.h"
#include "General.h"

//unsigned char data ucDisBuffer[40];	//display buffer
//unsigned char data ucCursorType;	//Cursor Type:0=turn off,1=turn on,2=blink,others no define
//unsigned char data ucCursorPos;		//Cursor Position:range 0－40

unsigned char xdata ucDisplayDat _at_ 0x4000;
unsigned char xdata ucDisplayCom _at_ 0x4001;

extern UIMemory	xdata UIDataArea;	//define in NDSBSCUI.C

/////////////////////////////////////////////////////////////////////////////////////////////////
/***********************************************************
*                                                          *
*	Initialize display parameter                           *
*                                                          *
***********************************************************/
void InitDisplay(void)
{
//	ucCursorType= 0;
//	ucCursorPos	= 40;
	ResetLCD();
}

/***********************************************************
*                                                          *
*	write display buffer(code area to data area)           *
*                                                          *
***********************************************************/
/*
void WriteDisBuf_c(unsigned char code *pStr_Sour)
{
unsigned char data *pstr_Tmp;
	pstr_Tmp = ucDisBuffer;
	while( pstr_Tmp != ucDisBuffer+40)
	{
		*(pstr_Tmp++) = *(pStr_Sour++);
	}
}
*/
/***********************************************************
*                                                          *
*	write display buffer(xdata area to data area)          *
*                                                          *
***********************************************************/
/*
void WriteDisBuf_x(void)
{
unsigned char data *pstr_Des;
unsigned char xdata *pstr_Sour;

	pstr_Des = ucDisBuffer;
	pstr_Sour= UIDataArea.DisBuffer.DisplayBuffer;
	while( pstr_Des != ucDisBuffer+40)
	{
		*(pstr_Des++) = *(pstr_Sour++);
	}
	ucCursorType= UIDataArea.DisBuffer.CursorType;
	ucCursorPos	= UIDataArea.DisBuffer.CursorPos;
}
*/
/***********************************************************
*                                                          *
*	Initialize the LCD panel                               *
*                                                          *
***********************************************************/
void ResetLCD(void)
{
	ucDisplayCom = 0x01;		//Clear Display
	DelayTime(0x02);
	ucDisplayCom = 0x38;		//8Bit BUS/2Line display mode/5*11 dots
	DelayCycle(0x16);
	ucDisplayCom = 0x0c;		//Display on/Cursor off/Cursor blink off
	DelayCycle(0x16);
	ucDisplayCom = 0x06;		//
	DelayCycle(0x16);
}

/***********************************************************
*                                                          *
*	将DisBuffer中40Bytes送显示屏,设置光标位置、类型等      *
*                                                          *
***********************************************************/
/*
void Display(void)
{
unsigned char data *pstr_Tmp;
	ucDisplayCom = 0x80;
	DelayCycle(0x08);

	pstr_Tmp = ucDisBuffer;
	while( pstr_Tmp != ucDisBuffer+20)
	{
		ucDisplayDat = *(pstr_Tmp++);
		DelayCycle(0x08);
	}

	ucDisplayCom = 0xc0;	//Second line
	DelayCycle(0x08);

	while( pstr_Tmp != ucDisBuffer+40)
	{
		ucDisplayDat = *(pstr_Tmp++);
		DelayCycle(0x08);
	}

	if( ucCursorPos >= 20 )	//Set cursor position
	{
		ucDisplayCom = (ucCursorPos+44) | 0x80;
	}
	else
	{
		ucDisplayCom = ucCursorPos | 0x80;
	}
	DelayCycle(0x08);
	
	if( ucCursorType == 0x00)	//Cursor type
	{
		ucDisplayCom = 0x0c;	//turn off the cursor
	}
	else if( ucCursorType == 0x01)
	{
		ucDisplayCom = 0x0e;	//turn on the cursor
	}
	else if( ucCursorType == 0x02)
	{
		ucDisplayCom = 0x0f;	//blink
	}
	DelayCycle(0x08);
}
*/
/***************************************************************
*                                                              *
*	将双口RAM中显示缓冲区的内容送显示屏,设置光标位置、类型等   *
*                                                              *
***************************************************************/
void DisplayEx(void)
{
unsigned char xdata *pstr_Tmp;
unsigned char ucTmp;
	ucDisplayCom = 0x80;	//first line
	DelayCycle(0x08);

	pstr_Tmp = UIDataArea.DisBuffer.DisplayBuffer;
	ucTmp = 20;
	while( ucTmp-- )
	{
		ucDisplayDat = *(pstr_Tmp++);
		DelayCycle(0x06);
	}

	ucDisplayCom = 0xc0;	//Second line
	DelayCycle(0x08);

	ucTmp = 20;
	while( ucTmp-- )
	{
		ucDisplayDat = *(pstr_Tmp++);
		DelayCycle(0x06);
	}

	if( UIDataArea.DisBuffer.CursorPos >= 20 )	//Set cursor position
	{
		ucDisplayCom = (UIDataArea.DisBuffer.CursorPos+44) | 0x80;
	}
	else
	{
		ucDisplayCom = UIDataArea.DisBuffer.CursorPos | 0x80;
	}
	DelayCycle(0x08);
	
	if( UIDataArea.DisBuffer.CursorType == 0x00)	//Cursor type
	{
		ucDisplayCom = 0x0c;	//turn off the cursor
	}
	else if( UIDataArea.DisBuffer.CursorType == 0x01)
	{
		ucDisplayCom = 0x0e;	//turn on the cursor
	}
	else if( UIDataArea.DisBuffer.CursorType == 0x02)
	{
		ucDisplayCom = 0x0f;	//blink
	}
	DelayCycle(0x08);
}

/***************************************************************
*                                                              *
*	将指定的ROM区的内容送显示屏                                *
*                                                              *
***************************************************************/
void DisplayRom(unsigned char code *pstr_Tmp)
{
unsigned char ucTmp;
	ucDisplayCom = 0x80;	//first line
	DelayCycle(0x08);

	ucTmp = 20;
	while( ucTmp-- )
	{
		ucDisplayDat = *(pstr_Tmp++);
		DelayCycle(0x06);
	}

	ucDisplayCom = 0xc0;	//Second line
	DelayCycle(0x08);

	ucTmp = 20;
	while( ucTmp-- )
	{
		ucDisplayDat = *(pstr_Tmp++);
		DelayCycle(0x06);
	}
}
/***********************************************************
*                                                          *
*	set type of the cursor:                                *
*		0=turn off                                         *
*		1=turn on,not blink                                *
*		2=turn on,blink                                    *
*                                                          *
***********************************************************/
/*void SetCursorType(unsigned char ucType)
{
	if( ucType == 0x00)	//Cursor type
	{
		ucDisplayCom = 0x0c;	//turn off
	}
	else if( ucType == 0x01)
	{
		ucDisplayCom = 0x0e;	//turn on,not blink
	}
	else if( ucType == 0x02)
	{
		ucDisplayCom = 0x0f;	//blink
	}
	DelayCycle(0x08);
}
*/
/***********************************************************
*                                                          *
*	set position of the cursor                             *
*                                                          *
***********************************************************/
void SetCursorPos(unsigned char ucPos)
{
	if( ucPos >= 20 )
	{//first line
		ucDisplayCom = (ucPos+44) | 0x80;
	}
	else
	{//second line
		ucDisplayCom = ucPos | 0x80;
	}
	DelayCycle(0x08);
}

/***********************************************************
*                                                          *
*	display a char at current position                     *
*                                                          *
***********************************************************/
void DisplayChar(unsigned char ucDisByte)
{
	ucDisplayDat = ucDisByte;
	DelayCycle(0x08);
}