最近学了LED点阵，并用了三种方式显示字母组，分别为按键控制显示，自动变换显示，和滚动显示

第一种

#include"reg51.h"

#include

typedef unsigned char u8;

typedef unsigned int u16;

sbit RCLK=P3^5;

sbit SRCLK=P3^6;

sbit SER=P3^4;

#define GPIP_KEY P1

#define GPIO_DIG P0

u8 keyvalue;

u8 code duan[16][8]={{0x00,0x42,0x7e,0x42,0x42,0x3c,0x00,0x00},//对字母编码

{0x00,0x11,0x12,0x14,0xF8,0x14,0x12,0x11},

{0x00,0x00,0x60,0x10,0x0E,0x10,0x60,0x00},

{0x18,0x24,0x22,0x11,0x22,0x24,0x18,0x00},

{0x00,0x42,0x7E,0x42,0x02,0x06,0x00,0x00},

{0x00,0x06,0x61,0x91,0x89,0x86,0x60,0x00},

{0x81,0xFF,0x81,0x60,0x18,0x86,0xFF,0x81}};

u8 code ledwei[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//扫描数组

void delay(u16 i)

{

while(i--);

}

void keydown() //按键函数

{

u8 a;

GPIP_KEY=0x0f;

if(GPIP_KEY!=0x0f)

{

delay(1000);

if(GPIP_KEY!=0x0f)

{

GPIP_KEY=0x0f;

switch(GPIP_KEY)

{

case(0x07): keyvalue=0; break;

case(0x0b): keyvalue=1; break;

case(0x0d): keyvalue=2; break;

case(0x0e): keyvalue=3; break;

}

GPIP_KEY=0xf0;

switch(GPIP_KEY)

{

case(0x70): keyvalue=keyvalue; break;

case(0xb0): keyvalue=keyvalue+4; break;

case(0xd0): keyvalue=keyvalue+8; break;

case(0xe0): keyvalue=keyvalue+12; break;

}

while((a<50)&&(GPIP_KEY!=0xf0))

{

delay(1000);

a++;

}

}

}

}

void hc595sendbyte(u8 dat) //hc595模块定义

{

u8 a;

SRCLK=0;

RCLK=0;

for(a=0;a<8;a++)

{

SER=dat>>7;

dat<<=1;

SRCLK=1;

_nop_();

_nop_();

SRCLK=0;

}

RCLK=1;

_nop_();

_nop_();

SRCLK=0;

}

void main()

{

u8 i;

while(1)

{

keydown();

for(i=0;i<8;i++)

{

P0=ledwei[i];

hc595sendbyte(duan[keyvalue][i]);

delay(100);

hc595sendbyte(0x00); //LED矩阵消影

}

}

}

第二种：

#include"reg51.h"

#include

typedef unsigned char u8;

typedef unsigned int u16;

sbit RCLK=P3^5;

sbit SRCLK=P3^6;

sbit SER=P3^4;

#define GPIP_KEY P1

#define GPIO_DIG P0

u8 keyvalue;

u8 code duan[7][8]={{0x00,0x42,0x7e,0x42,0x42,0x3c,0x00,0x00},//字母段设置

{0x00,0x11,0x12,0x14,0xF8,0x14,0x12,0x11},

{0x00,0x00,0x60,0x10,0x0E,0x10,0x60,0x00},

{0x18,0x24,0x22,0x11,0x22,0x24,0x18,0x00},

{0x00,0x42,0x7E,0x42,0x02,0x06,0x00,0x00},

{0x00,0x06,0x61,0x91,0x89,0x86,0x60,0x00},

{0x81,0xFF,0x81,0x60,0x18,0x86,0xFF,0x81}};

u8 code ledwei[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//扫描段

void delay(u16 i)

{

while(i--);

}

void hc595sendbyte(u8 dat) //hc595模块设置

{

u8 a;

SRCLK=0;

RCLK=0;

for(a=0;a<8;a++)

{

SER=dat>>7;

dat<<=1;

SRCLK=1;

_nop_();

_nop_();

SRCLK=0;

}

RCLK=1;

_nop_();

_nop_();

SRCLK=0;

}

void main()

{

while(1)

{

u8 i,j,t=100;

for(i=0;i<7;i++)

{

while(t--)

{

for(j=0;j<8;j++)

{

P0=ledwei[j];

hc595sendbyte(duan[i][j]);

delay(100);

hc595sendbyte(0x00);//LED矩阵消影

}

}

t=100;

}

hc595sendbyte(0x00);

}

}

第三种

#include"reg51.h"

#include

typedef unsigned char u8;

typedef unsigned int u16;

sbit RCLK=P3^5;

sbit SRCLK=P3^6;

sbit SER=P3^4;

#define GPIP_KEY P1

#define GPIO_DIG P0

u8 keyvalue;

u8 code duan[]={0x00,0x00,0x00,0x00,0x42,0x7E,0x42,0x00, //I

0x41,0x7F,0x41,0x01,0x01,0x03,0x00, //L

0x3C,0x42,0x42,0x42,0x3C,0x00, //O

0x70,0x0C,0x02,0x0C,0x70,0x00, //V

0x7F,0x49,0x49,0x49,0x49,0x00, //E

0x60,0x10,0x0E,0x10,0x60,0x00, //Y

0x3C,0x42,0x42,0x42,0x3C,0x00, //O

0x40,0x7C,0x42,0x01,0x01,0x42,0x7C,0x40 //U

};

u8 code ledwei[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//扫描编码段

void delay(u16 i)

{

while(i--);

}

void hc595sendbyte(u8 dat)//hc595模块初始化

{

u8 a;

SRCLK=0;

RCLK=0;

for(a=0;a<8;a++)

{

SER=dat>>7;

dat<<=1;

SRCLK=1;

_nop_();

_nop_();

SRCLK=0;

}

RCLK=1;

_nop_();

_nop_();

SRCLK=0;

}

void main()

{

while(1)

{

u8 i,j,t=30,q=0;

for(i=0;i<46;i++)

{

while(t--)

{

for(j=i;j<8+i;j++)

{

P0=ledwei[q++];

hc595sendbyte(duan[j]);

delay(100);

hc595sendbyte(0x00); //LED矩阵消影

}

q=0;

}

t=30;

}

}

}