lcd.c

51开发板调试程序

#include <reg52.h>
#include <intrins.h>
#include "Define.h"
#include "Set.h"

sbit dc=P0^6; /*P2.0 LCD 的RS  21*/
sbit rw=P0^7; /*P2.1 LCD 的R/W 22*/
sbit cs=P1^4; /*P2.4 LCD 的E   25*/
sfr  lcdbus=0xA0; /*p0LCD 数据 D0=P0.0*/

unsigned int sys10mscounter;
unsigned char syslimitcounter;

char path1[8]={0x00,0x1f,0x00,0x1f,0x00,0x1f,0x00,0x1f};/*自定义符号横1*/
char path2[8]={0x1f,0x00,0x1f,0x00,0x1f,0x00,0x1f,0x00};/*自定义符号横2*/
char pats1[8]={0x15,0x15,0x15,0x15,0x15,0x15,0x15,0x15};/*自定义符号竖1*/
char pats2[8]={0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,0x0a,0x0a};/*自定义符号竖2*/

void soft_nop()
{
    ;
}

void soft_10ms()/***********12MHZ 提供10MS 软件延时************/
{ 
    register int i;
    for(i=0;i<711;i++)
	{
	    ;
	}
}

void soft_20ms()/***********12MHZ 提供20MS 软件延时************/
{ 
    soft_10ms();
    soft_10ms();
}

void hard_10ms(unsigned int delaytime) /*基于10MS 的硬件延时*/
{ 
    sys10mscounter=delaytime;
    while(sys10mscounter);
}

//////////////////////////////////////
unsigned char data lcdcounter;
bit lcdusing1,lcdusing2;

bit lcd_checkbusy()/*检查LCD 忙*/
{ 
    register lcdstate;
    dc=0; /*dc=1为数据,=0 为命令.*/
    rw=1; /*rw=1为读,=0为写.*/
    cs=1; /*cs=1选通.*/
    soft_nop();
    lcdstate=lcdbus;
    cs=0;

    return((bit)(lcdstate&0x80));
}

void lcd_wrcmd(unsigned char lcdcmd) /*写LCD命令*/
{ 
    lcdusing1=1;

    while(lcd_checkbusy());

    lcdbus=lcdcmd;
    dc=0; /*dc=1为数据,=0 为命令.*/
    rw=0; /*rw=1为读,=0为写.*/
    cs=1; /*cs=1选通.*/
    soft_nop();
    cs=0;
    lcdbus=0xff;
    lcdusing1=0;
}

void lcd_moveto(char position) /*移动光标到指定位.0-79*/
{ 
    register cmd=0x80;
    lcdcounter=position;
        
	if (position > 59)
	{
        position += 0x18;
	}
    else
    {   
	    if (position > 39)
		{
		    position -= 0x14;
		}
        else
        {       
		    if (position > 19)position += 0x2c;
        }
    }

    cmd=cmd|position;
    lcd_wrcmd(cmd);
}
void lcd_wrdata(char lcddata) /*在当前显示位置显示数据*/
{ 
    //char i;
    lcdusing2=1;

    while(lcd_checkbusy());

    if(lcdcounter==20)
	{
        lcd_moveto(20);
        while(lcd_checkbusy());
    }
    if(lcdcounter==40)
	{
        lcd_moveto(40);
        while(lcd_checkbusy());
    }
    if(lcdcounter==60)
	{
        lcd_moveto(60);
        while(lcd_checkbusy());
    }
    if(lcdcounter==80)
	{
        lcd_moveto(0);
        while(lcd_checkbusy());
        lcdcounter=0;
    } /*为通用而如此*/

	lcdcounter++;
    lcdbus=lcddata;
    dc=1; /*dc=1为数据,=0 为命令.*/
    rw=0; /*rw=1为读,=0为写.*/
    cs=1; /*cs=1选通.*/
    soft_nop();
    cs=0;

    lcdbus=0xff;
    lcdusing2=0;
}

void lcd_string(char *strpoint) /*在当前显示位置显示LCD 字符串*/
{ 
    register i=0;
    while(strpoint[i]!=0)
	{
        lcd_wrdata(strpoint[i]);
        i++;
    }
}

void lcd_init()/*初始化*/
{ 
    lcd_wrcmd(0x38); /*设置8 位格式,2行,5*7*/
    lcd_wrcmd(0x0c); /*整体显示,关光标,不闪烁*/
    lcd_wrcmd(0x06); /*设定输入方式,增量不移位*/
    lcd_wrcmd(0x01); /*清除显示*/
    lcdcounter=0;
}

void lcd_cls()/*清除显示*/
{ 
    lcd_wrcmd(0x01);
    lcdcounter=0;
}




/****************************************************************/
/*
main()
{
    unsigned char j;

    IE=0;
	P0=0xff;
	P1=0xff;
	P2=0xff;
	P3=0xff; /*初始化T*/
    //lcd_init();
	//soft_20ms();

    /*TMOD=0x51;
    TH0=0xd8; /*12M,10ms*/
    /*TL0=0xf6;
    TR0=1;
	ET0=1;
	EA=1;

	lcd_moveto(4);

	lcd_wrcmd(0x40);

    while(1)
    {
        /*全黑横一横二竖一竖二U Q ABCD... */
        /*lcd_init(); /*全黑*/

        /*for(j=0;j<80;j++)
		{
		    lcd_wrdata(0xff);
		}

		
        hard_10ms(50);
        lcd_init(); /*横一可参考自行设计符号*/
        /*lcd_wrcmd(0x40);
        
        for(j=0;j<8;j++)
		{
		    lcd_wrdata(path1[j]);
		}

        for(j=0;j<100;j++)
		{
		    lcd_wrdata(0);
		}

        hard_10ms(50);

        lcd_init(); /*横二*/
        /*lcd_wrcmd(0x40);
        for(j=0;j<8;j++)
		{
		    lcd_wrdata(path2[j]);
		}
        for(j=0;j<100;j++)
		{
		    lcd_wrdata(0);
		}

        hard_10ms(50);

        lcd_init(); /*竖一*/
        /*lcd_wrcmd(0x40);

        for(j=0;j<8;j++)
		{
		    lcd_wrdata(pats1[j]);
		}

        for(j=0;j<100;j++)
		{
		    lcd_wrdata(0);
		}

        hard_10ms(50);
        lcd_init(); /*竖二*/
        /*lcd_wrcmd(0x40);

        for(j=0;j<8;j++)
		{
		    lcd_wrdata(pats2[j]);
		}
        for(j=0;j<100;j++)
		{
		    lcd_wrdata(0);
		}
        hard_10ms(50);

        lcd_init();
        lcd_string("UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU");
        hard_10ms(50);

        lcd_init();
        lcd_string("QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ");
        hard_10ms(50);

        lcd_init();
        lcd_string("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz0123456789+-!#$%&?");
        hard_10ms(50);

    }
}
*/