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   源码介绍

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#include <reg51.h>
#include <intrins.h>
typedef unsigned char u8;
typedef unsigned int u16;
sbit RS=P2^7;
sbit RW=P2^6;
sbit E=P2^5;
sbit PSB=P2^4;
sbit RES=P2^2;

u8 code datas1[] = {"我爱中国"};
u8 code datas2[] = {"电子1901"};
u8 code datas3[] = {"108-08"};
u8 code datas4[] = {"宋涛"};

void delayUs()
{
  _nop_();
	_nop_();
}
void delayMs(u16 a)
{
    u16 i, j;
    for(i = a; i > 0; i--)
    for(j = 100; j > 0; j--);
}
bit checkBusy()
{
    bit busy;
    RS= 0;
    RW = 1;
    E = 1;
    delayUs();
    busy = (bit)(P0&0x80);
    E = 0;
    return busy;
}
void wait()
{
    while(checkBusy());
}
void writeCmd(u8 cmd)
{
    wait();
    RS = 0;
    RW = 0;
    E = 0;
    delayUs();
    P0 = cmd;
    delayUs();
    E = 1;
    delayUs();
    E = 0;
}
void writeData(u8 dat)
{
    wait();
    RS = 1;
    RW = 0;
    E = 0;
    delayUs();
   P0 = dat;
    delayUs();
    E = 1;
    delayUs();
    E = 0;
}
void init()
{
	    delayUs();
      PSB=1;
	    delayUs();
      RES=0;
	    delayUs();
      RES=1;
	    delayUs();
     writeCmd(0x30); 
     delayMs(10);
     writeCmd(0x0c); 
     delayMs(10);
     writeCmd(0x01); 
     delayMs(10);
}
void setPosition(u8 x, u8 y)
{
    u8 addr;
if(x==0)
{
addr=0x80 y;
}
else
if(x==1)
{
  addr=0x90 y;
}
else
if(x==2)
{
addr=0x88 y;
}
else
if(x==3)
{
addr=0x98 y;
}
addr =y;
    writeCmd(addr);
}

void writeString(u8 *str)
{
    u8 i = 0;
    while(str[i] != '\0')
    {
        writeData(str[i  ]);
    }
}
void main()
{
    init();
    setPosition(0, 0);
    writeString(datas1);
    setPosition(1, 0);
    writeString(datas2);
    setPosition(2, 0);
    writeString(datas3);
    setPosition(3, 0);
    writeString(datas4);
    while(1);
}