as.c

LCD1602.rar

#include <at89x51.h>
#define uchar unsigned char
#define uint  unsigned int

sbit din=P2^0;
sbit clk=P2^1;
sbit load=P2^2;

uchar b[8];

void csh()
{
	load=1;
	clk=1;
	din=1;
}

void write(char com,char da)
{
	uchar temp,i,j;
	load=0;
	clk=0;
	for(i=0;i<8;i++)
		{
		temp=com;
		if((temp&(0x80>>i))!=0)
			din=1;
		else din=0;
		clk=1;
		for(j=0;j<5;j++);
		clk=0;
		}
	 for(i=0;i<8;i++)
		{
		temp=da;
		if((temp&(0x80>>i))!=0)
			din=1;
		else din=0;
		clk=1;
		for(j=0;j<5;j++);
		clk=0;
		}
	 load=1;
}

void main()
{
	unsigned int i;
	csh();
	write(0x0c,0x01);//正常工作状态
	write(0x09,0xff);//译码选择，非BCD码
	write(0x0a,0x0f);//亮度调节
	write(0x0b,0x07);//显示位数

	while(1)
	{
		write(0x08,b[7]);
		write(0x07,b[6]);
		write(0x06,b[5]);
		write(0x05,b[4]);
		write(0x04,b[3]);
		write(0x03,b[2]);
		write(0x02,b[1]);
		write(0x01,b[0]);
		b[0]++;
		if (b[0]>9){b[1]++;b[0]=0;}
		if (b[1]>9){b[2]++;b[1]=0;}
		if (b[2]>9){b[3]++;b[2]=0;}
		if (b[3]>9){b[4]++;b[3]=0;}
		if (b[4]>9){b[5]++;b[4]=0;}
		if (b[5]>9){b[6]++;b[5]=0;}
		if (b[6]>9){b[7]++;b[6]=0;}
		if (b[7]>9)
		{
			b[0]=0;b[1]=0;
			b[2]=0;b[3]=0;
			b[4]=0;b[5]=0;
			b[6]=0;b[7]=0;
		}
	for(i=0;i<6000;i++);
	}
}