四位8×8点阵led显示.c

两个控制595的小程序。保证大家看后可以非常容易的学会使用它以及其他串进并出等器件

/************************************************************************
*   名称：四位8×8点阵LED显示                                            *
*   功能：在点阵上显示“SC51”四个字符                                    *
*   说明：用HC595作数显列驱动，74HC138作行线控制。                      *
*************************************************************************/
#include<REG51.H>
#include<intrins.h>

sbit Hc595clk=P2^0;	//Hc595的时钟脚
sbit Hc595data=P2^1;	//Hc595的数据脚
sbit Hc595en=P2^2;	//Hc595的使能脚

#define LineCtrl P1  //P1口作为行线控制

unsigned char code FONT8x8[4][8]={
 				//{0x24,0x14,0x0C,0x04,0x0C,0x14,0x24,0x00 }, //K
 				//{0x3E,0x02,0x02,0x3E,0x02,0x02,0x3E,0x00 }, //E
 				//{0x38,0x10,0x10,0x10,0x10,0x10,0x38,0x00 }, //I
				//{0x04,0x04,0x04,0x04,0x04,0x04,0x7C,0x00 }, //L
 				{0x18,0x24,0x04,0x08,0x10,0x24,0x18,0x00 }, //S	
				{0x78,0x44,0x04,0x04,0x04,0x44,0x78,0x00 }, //C
				{0x3C,0x04,0x04,0x3C,0x20,0x20,0x3C,0x00 }, //5
				{0x10,0x18,0x10,0x10,0x10,0x10,0x38,0x00 }  //1
 			} ;//横向、逆序取模

//延时子函数
void delayms(unsigned int ms)
{
	unsigned int i=100;
	while(ms--)
	{
		while(i--);
		i=10;
	}
}

//送一个字节
void SendByte(unsigned char dat)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{
		if(dat&0x80)
		Hc595data=1;
		else
		Hc595data=0;
		Hc595clk=0;
		Hc595clk=1;
		dat=dat<<1;		
	}
}

//每次显示四个字的一行，八行显示完成，就显示出四个完整字。
void Display(unsigned char *dat1,unsigned char *dat2,unsigned char *dat3,unsigned char *dat4)
{
	
	unsigned char i;
	for(i=0;i<8;i++)
	{
				
		SendByte(dat1[i]);
		SendByte(dat2[i]);
		SendByte(dat3[i]);
		SendByte(dat4[i]);
		Hc595en=0;
		LineCtrl=i;
		Hc595en=1;
		delayms(10);
	}
}

//主程序
void main(void)
{
	while(1)
	Display(FONT8x8[3],FONT8x8[2],FONT8x8[1],FONT8x8[0]);

		
}