#include <reg52.h>
#define uint unsigned int
#define uchar unsigned char
#define x 0x80
#define y 0x80
#define comm 0
#define dat 1
//|-----------------| |-----------------|
//| VDD|--------------------|VCC |
//| LED+|--------------------|VCC |
//| LED-|--------------------|GND |
//| VSS|--------------------|GND |
//| | | 89C52 |
//| DB0|--------------------|P1.0 |
//| DB1|--------------------|P1.1 |
//| DB2|--------------------|P1.2 |
//| OCMJ2X4C DB3|--------------------|P1.3 |
//| DB4|--------------------|P1.4 |
//| DB5|--------------------|P1.5 |
//| DB6|--------------------|P1.6 |
//| DB7(busy)|--------------------|P1.7 |
//| rs|--------------------|P3.0 |
//| rw|--------------------|P3.1 |
//| e|--------------------|P3.2 |
//| psb|--------------------|P3.3 |
//| rst|--------------------|P3.4 |
//|-----------------| |-----------------|
sbit rs = P3^0; //H=data; L=command;
sbit rw = P3^1; //H=read; L=write;
sbit e = P3^2; //input enable;
sbit psb= P3^3; //H=并口; L=串口;
sbit rst= P3^4; //Reset Signal 低電平有效
sbit busy=P1^7; //lcd busy bit
void wr_lcd (uchar dat_comm,uchar content);
void chk_busy (void);
void delay (uint us);
uchar code tab1[]={
" 閥門(mén) "
" 80% "
};
/*------------------初始化-----------------*/
void init_lcd (void)
{
rst=1;
psb=1;
wr_lcd (comm,0x30); /*30---基本指令動(dòng)作*/
wr_lcd (comm,0x01); /*清屏,地址指針指向00H*/
wr_lcd (comm,0x06); /*光標(biāo)的移動(dòng)方向*/
wr_lcd (comm,0x0c); /*開(kāi)顯示,關(guān)游標(biāo)*/
}
/*---------------顯示漢字或字符----------------*/
void chn_disp (uchar code *chn)
{
uchar i,j;
wr_lcd (comm,0x30);
wr_lcd (comm,0x80);
j=0;
for (i=0;i<8;i++)
wr_lcd (dat,chn[j*8+i]);
wr_lcd (comm,0x90);
j=1;
for (i=0;i<8;i++)
wr_lcd (dat,chn[j*8+i]);
}
/*--------------清DDRAM------------------*/
void clrram (void)
{
wr_lcd (comm,0x30);
wr_lcd (comm,0x01);
}
/*---------------------------------------*/
void wr_lcd (uchar dat_comm,uchar content)
{
chk_busy ();
if(dat_comm)
{
rs=1; //data
rw=0; //write
}
else
{
rs=0; //command
rw=0; //write
}
P1=content; //output data or comm
e=1;
;
e=0;
}
void chk_busy (void)
{
P1=0xff;
rs=0;
rw=1;
e =1;
while(busy==1);
e =0;
}
/*---------------------------------------*/
void delay (uint us) //delay time
{
while(us--);
}
/*------------------主程序--------------------*/
void main ()
{
SP=0x5f;
init_lcd ();
clrram();
chn_disp (tab1);
while (1);
}
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