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📄 1602lcm.c

📁 MCS51控制1602字符型LCD的源代码
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/*===================================================================

			KS0070(44780) 16x2 字符液晶屏驱动演示程序         
=====================================================================
连接线图:	LCM-------51 	LCM-------51 	LCM--------51
        	DB0-----P0.0 	DB4-----P0.4 	RS-------P2.7
        	DB1-----P0.1 	DB5-----P0.5 	RW-------P2.6
        	DB2-----P0.2 	DB6-----P0.6 	E--------P2.5
        	DB3-----P0.3 	DB7-----P0.7 	VLCD接1K2电阻到GND

[注]:AT89C52的晶振频率为12MHz
====================================================================*/
#include    <sst89x5x4.h>
#include<intrins.h>
//void Delay400Ms(void);
//变量类型标识的宏定义，大家都喜欢这么做
#define	Uchar unsigned char
#define Uint unsigned int

extern struct  TIME_STRUCT
{
	unsigned  char  second;
	unsigned  char  minute;
	unsigned  char  hour;
	unsigned  char  day;
	unsigned  char  month;
	unsigned  char  week;
	unsigned  char  year;

} time ;//data

// 控制引脚定义，不同的连接必须修改的部分
sbit	RS	= P1^2;
sbit	RW	= P1^3;
sbit	Elcm	= P1^1;
#define DataPort P0				// 数据端口

#define Busy	0x80
code char exampl[]=" 5  Tube control      - feelux\n";

void Disp_set(Uchar CMD);
void Delay400Ms(void);
void Delay5Ms(void);
void WaitForEnable( void );
void LcdWriteData( char dataW );
void LcdWriteCommand( Uchar CMD,Uchar AttribC );
void LcdReset( void );
void Display( Uchar dd );
void DispOneChar(Uchar x,Uchar y,Uchar Wdata);
void ePutstr(Uchar x,Uchar y, Uchar code *ptr);
void Loc_dispstr(Uchar x,Uchar y,char  *ptr ,unsigned char length) ;
/*
//测试主程序
void main(void)
{
	Uchar temp;
	
	Delay400Ms();

	LcdReset();
	temp = 32;
	ePutstr(0,0,exampl);		// 上面一行显示一个预定字符串

	Delay400Ms();

	while(1)
	{
		temp &= 0x7f;			// 只显示ASCII字符
		if (temp<32)temp=32;	// 屏蔽控制字符，不予显示
		Display( temp++ );
		Delay400Ms();
	}
}

/*=======================================================
 显示字符串
=======================================================*/
void ePutstr(Uchar x,Uchar y, Uchar code *ptr) {
Uchar i,l=0;
	while (ptr[l] >31){l++;};
	for (i=0;i<l;i++) {
		DispOneChar(x++,y,ptr[i]);
		if ( x == 16 ){
			x = 0; y ^= 1;
		}
	}
}

/*=======================================================
 演示一行连续字符串，配合上位程序演示移动字串
=======================================================
void Display( Uchar dd ) {

Uchar i;
	
	for (i=0;i<16;i++) 
	{
		DispOneChar(i,1,dd++);
		dd &= 0x7f;
		if (dd<32) dd=32;
	}
}
*/

/*=======================================================
 显示光标定位
=======================================================*/
void LocateXY( char posx,char posy) //posy = 0 / 1
{
	Uchar temp;
	temp = posx & 0x0f;
	posy &= 0x03;
	if ( posy ==1)   
		{temp |= 0x40;}
	else if(posy == 2)
		{temp += 0x10;}
	else if ( posy ==3)   
		{temp += 0x50;}
	temp |= 0x80;
	LcdWriteCommand(temp,1);
}

/*=======================================================
 按指定位置显示数出一个字符
=======================================================*/
void DispOneChar(Uchar x,Uchar y,Uchar Wdata) 
{
	LocateXY( x, y );				// 定位显示地址
	LcdWriteData( Wdata );			// 写字符
}
/*=======================================================
 按指定位置显示数出一个字符串
=======================================================*/
void Loc_dispstr(Uchar x,Uchar y,char  *ptr ,unsigned char length) 
{
   Uchar i;
	LocateXY( x, y );				// 定位显示地址
	for (i=0;i<length;i++) 
	{
		if(*ptr == 0x5f)
			*ptr = ' ';
		LcdWriteData(*ptr  );			// 写字符
		 ptr++;
	}
}

extern unsigned char test_93c46(unsigned char addr,unsigned char writ_temp);
/*=======================================================
 初始化程序, 必须按照产品资料介绍的初始化过程进行
=======================================================*/
void LcdReset( void ) 
{
	Uchar temp;
//unsigned char i ;
//unsigned char j=0x35;

   	LcdWriteCommand( 0x38, 0);			// 显示模式设置(不检测忙信号)
		Delay5Ms();
	LcdWriteCommand( 0x38, 0);			// 共三次
		Delay5Ms();
	LcdWriteCommand( 0x38, 0);
		Delay5Ms();

	LcdWriteCommand( 0x38, 1);			// 显示模式设置(以后均检测忙信号)
    LcdWriteCommand( 0x08, 1);			// 显示关闭
   	LcdWriteCommand( 0x01, 1);			// 显示清屏
	LcdWriteCommand( 0x06, 1);			// 显示光标移动设置
	LcdWriteCommand( 0x0c, 1);			// 显示开及光标设置
//add for test
	temp = 32;
	ePutstr(0,0,exampl);		// 上面一行显示一个预定字符串
    Delay400Ms();
    Delay400Ms();
//LcdWriteCommand( 0x0f, 1);			// 显示开及光标设置
	Delay400Ms();
	Disp_set(0x01);


}

/*=======================================================
 写控制字符子程序: E=1 RS=0 RW=0
=======================================================*/
void LcdWriteCommand( Uchar CMD,Uchar AttribC ) {

	if (AttribC) WaitForEnable();				// 检测忙信号?
	
	RS = 0;	RW = 0; _nop_();

	DataPort = CMD; _nop_();					// 送控制字子程序
	
	Elcm = 1;_nop_();_nop_();Elcm = 0;
      			// 操作允许脉冲信号	
}
	
/*=======================================================
 当前位置写字符子程序: E =1 RS=1 RW=0
=======================================================*/
void LcdWriteData( char dataW ) {

	WaitForEnable();							// 检测忙信号

	RS = 1; RW = 0; _nop_();

    DataPort = dataW; _nop_();

	Elcm = 1; _nop_(); _nop_();Elcm = 0; 
   		// 操作允许脉冲信号		

}

/*=======================================================
正常读写操作之前必须检测LCD控制器状态:	CS=1 RS=0 RW=1
DB7:    0  LCD控制器空闲; 1  LCD控制器忙
========================================================*/
void WaitForEnable( void ) {

	DataPort = 0xff;
	RS =0; RW = 1; _nop_();	Elcm = 1; _nop_(); _nop_();
 //test
	 while( DataPort & Busy );

	Elcm = 0;
}	
                       

// 短延时
void Delay5Ms(void)
{
	Uint i = 5552;
	while(i--);
}
/**/
//长延时
void Delay400Ms(void)
{
	Uchar i = 2;
	Uint j;
	while(i--)
	{
		j=7269;
		while(j--);
	};
}

  //显示各功能设置
void Disp_set(Uchar CMD)
{
    WaitForEnable();				// 检测忙信号?
	RS = 0;	RW = 0; _nop_();

	DataPort = CMD; _nop_();		// 送控制字子程序
	
	Elcm = 1;_nop_();_nop_();Elcm = 0;// 操作允许脉冲信号	

}

  //指定位置开始显示指定多的字符
/*void  disp_time(struct time_struct *time_point)
{
	unsigned char i;
	Disp_set(0x01);
//	Disp_set(0x0c);
	i = time.hour/10 + 0x30;
	DispOneChar(4,0,i);
	i = time.hour%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x3a);
	i = time.minute/10 + 0x30;
	LcdWriteData(i);
	i = time.minute%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x3a);
	i = time.second/10 + 0x30;
	LcdWriteData(i);
	i = time.second%10 + 0x30;
	LcdWriteData(i);

	
}*/
void  disp_time(struct TIME_STRUCT *time_point)
{
	unsigned char i,j;
//	Disp_set(0x01);
//	Disp_set(0x0c);
	j = time_point->hour;
	i = j/10 + 0x30;
	DispOneChar(4,2,i);
	i = j%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x3a);
	j = time_point->minute;
	i = j/10 + 0x30;
	LcdWriteData(i);
	i = j%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x3a);
	j = time_point->second;
	i = j/10 + 0x30;
	LcdWriteData(i);
	i = j%10 + 0x30;
	LcdWriteData(i);

	
}
/*
void  disp_time(void)
{
	unsigned char i;
	Disp_set(0x01);
//	Disp_set(0x0c);
	i = time.hour/10 + 0x30;
	DispOneChar(4,0,i);
	i = time.hour%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x3a);
	i = time.minute/10 + 0x30;
	LcdWriteData(i);
	i = time.minute%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x3a);
	i = time.second/10 + 0x30;
	LcdWriteData(i);
	i = time.second%10 + 0x30;
	LcdWriteData(i);

	
}*/
extern unsigned char code  week[8][3];

void  disp_date(struct TIME_STRUCT *time_point)
{
	unsigned char i,j;
//	Disp_set(0x01);
//	Disp_set(0x0c);
	j = time_point->month;
	i = j/10 + 0x30;
	DispOneChar(1,0,i);
	i = j%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x2d);
	j = time_point->day;
	i = j/10 + 0x30;
	LcdWriteData(i);
	i = j%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x2d);
	LcdWriteData(0x32);
	LcdWriteData(0x30);
	j = time_point->year;
	i = j/10 + 0x30;
	LcdWriteData(i);
	i = j%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x20);
	j = time_point->week;
	LcdWriteData(week[j][0]);
	LcdWriteData(week[j][1]);
	LcdWriteData(week[j][2]);

	
}
/*
void  disp_date(struct TIME_STRUCT *time_point)
{
	unsigned char i,j;
	Disp_set(0x01);
//	Disp_set(0x0c);
	i = time_point->month/10 + 0x30;
	DispOneChar(1,0,i);
	i = time_point->month%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x2d);
	i = time_point->day/10 + 0x30;
	LcdWriteData(i);
	i = time_point->day%10 + 0x30;
	LcdWriteData(i);
	LcdWriteData(0x2d);
	LcdWriteData(0x32);
	LcdWriteData(0x30);
	i = time_point->year/10 + 0x30;
	LcdWriteData(i);
	i = time_point->year%10 + 0x30;
	LcdWriteData(0x2e);
	LcdWriteData(i);
	j = time_point->week;
	LcdWriteData(week[j][0]);
	LcdWriteData(week[j][1]);
	LcdWriteData(week[j][2]);

	
}
*/

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