液晶.c

液晶1602的。你太狠了

/*
接线
DB0~DB7=P1
RS=P3^2
RW=P3^1
E=P3^0
*/
#include<reg51.h>
#include "intrins.h"
#define	uchar	unsigned char
#define	uint	unsigned int
#define	nop _nop_()
#define	CYCLE 50000
#define	DB0_DB7	P1
/*"this is demo for 51 controlling 1602LCD!"的代码表*/
static const uchar code table[]={0x54,0x68,0x69,0x73,
								0x20,0x69,0x73,0x20,
								0x61,0x20,0x64,0x65,
								0x6d,0x6f,0x20,0x66,
								0x6f,0x72,0x20,0x35,
								0x31,0x20,0x63,0x6f,
								0x6e,0x74,0x72,0x6f,
								0x6c,0x6c,0x69,0x6e,
								0x67,0x20,0x31,0x36,
								0x30,0x32,0x4c,0x43,
								0x44,0x21};
sbit	RS=P3^2;
sbit	RW=P3^1;
sbit	E=P3^0;
uchar	Dataflag,Cmdflag;
uint	counti;

/*函数列表*/
void	init();
void	Write(uchar tempdata);
void	WriteDDR(uchar tempdata);
void	CheckBusy();
void	Delay(uint N);

/*主程序*/
void 	main(void)
{
	TCON=0x01;
	TH0=(65536-CYCLE)/256;
	TL0=(65536-CYCLE)%256;
	TR0=1;
	IE=0x82;
	init();
	counti=0;
	while(1)
	nop;
}

/*延时子程序*/
void	Delay(uint N)
{
	uint i;
	for(i=0;i<N;i++)
	{
		i=1;
	}
}

/*初始化子程序*/
void	init()
{
	RS=0;
	RW=0;
	E=1;
	Write(0x38);
	Delay(1000);
	Write(0x38);
	Delay(1000);
	Write(0x38);
	Write(0x0C);
	Write(0x01);
	Write(0x0F);
	Write(0x06);
	Write(0x01);
}

/*写命令子程序*/
void	Write(uchar	tempdata)
{
	DB0_DB7=tempdata;
	RS=0;
	RW=0;
	E=0;
	nop;
	E=1;
	nop;
	CheckBusy();
}

/*写数据子程序*/
void	WriteDDR(uchar tempdata)
{
	DB0_DB7=tempdata;
	RS=1;
	nop;
	RW=0;
	E=0;
	nop;
	E=1;
	nop;
	CheckBusy();
}

/*判忙子程序*/
void	CheckBusy()
{
	uchar temp;
	DB0_DB7=0xff;
	RW=1;
	RS=0;
	E=0;
	nop;
	E=1;
	do
	{
		nop;
		temp=DB0_DB7;
	}
	while((temp&0x80)==0x80);
	RW=0;
}

/*Timer0中断子程序*/
void	service_int0() interrupt 1 using 2
{
	static	uchar s_Counter;
	if(++s_Counter>=20)
	{
		if(counti<=14)
		{
         	WriteDDR(table[counti]);
			counti++;
		}
		else if(counti>14&&counti<sizeof(table))
		{
			Write(0x07);
			WriteDDR(table[counti]);
			counti++;
		}
		else 
		{
			counti=0;
			Write(0x01);
			Write(0x06);
		}
	}
	TH0=(65536-CYCLE)/256;
	TL0=(65536-CYCLE)%256;
}