8x8 LED dot matrix based on 51 single chip microcomputer

I recently learned about LED dot matrix and used three methods to display letter groups, namely key control display, automatic change display, and scroll display.

The first

#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}, //Encode letters

                     {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}; //Scan array

void delay(u16 i)

{  

     while(i--);

}

void keydown() //key function

{   

 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 module definition

{

    u8 a;

SRCLK=0;

RCLK=0;

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

{

    SER=that>>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=barely[i];

  hc595sendbyte(duan[keyvalue][i]);

  delay(100);

  hc595sendbyte(0x00); //LED matrix shadow removal

}

}

}

Second type:

#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}, //letter segment setting

                     {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}; //Scan segment

void delay(u16 i)

{  

     while(i--);

}

void hc595sendbyte(u8 dat) //hc595 module settings

{

    u8 a;

    SRCLK=0;

    RCLK=0;

    for(a=0;a<8;a++)

    {

        SER=that>>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 matrix shadow elimination

          }

         }

         t=100; 

     }

     hc595sendbyte(0x00);

   }

} 

The third

#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}; //Scan code segment

void delay(u16 i)

{  

     while(i--);

}

void hc595sendbyte(u8 dat)//hc595 module initialization

{

    u8 a;

SRCLK=0;

RCLK=0;

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

{

    SER=that>>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 matrix shadow removal

  }

  q=0;

 }

 t=30; 

}

}

}