EngineersGarage

You are here: Home / Topics / interfacing

interfacing

|

Microcontroller › 8051 › interfacing

Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • July 25, 2011 at 5:30 pm #1222
    Ashish Angural
    Participant

    can anybody please give me the example that how we interface lcd with leds and seven segment display

     

    plz explain using c

    July 27, 2011 at 5:36 am #6526
    dagakshay
    Participant

    Hi ashish,

    will you please elobrate youself….

    August 21, 2011 at 1:44 am #6616
    Ashish Angural
    Participant

    i am new to mc and i want to run lcd, led, seven segments and dc motor together and for that i have writen a code just chech that wether this code is correct or not

    #include

    #include

    #define data P1

    sbit S1=P3^0;
    sbit S2=P3^1;
    sbit S3=P3^2;
    sbit motor=P3^3;
    sbit S4=P3^4;

    sbit RS=P2^0;
    sbit RW=P2^1;
    sbit E=P2^2;

    sbit A1=P0^0;
    sbit B1=P0^1;
    sbit C1=P0^2;
    sbit D1=P0^3;

    void ms_delay(unsigned int a)
    {
    unsigned int i,j;
    for(i=0;i {
    for(j=0;j<70;j++)
    {
    _nop_();
    }
    }
    }

    void sec_delay(unsigned int a)
    {
    unsigned int i,j;
    for(i=0;i {
    for(j=0;j<1000;j++)
    {
    ms_delay(1);
    }
    }
    }

    void ibit_left()
    {
    unsigned char i,a;
    while(1);
    {
    if(S1==0)
    {
    a=0xfe;
    for(i=0;i<8;i++)
    {
    P1=a;
    a=a<<1;
    a=a+0x01;
    ms_delay(500);
    }
    }
    }
    }

    void right_shift()
    {
    unsigned char i,a;
    while(1);
    {
    if(S2==0)
    {
    a=0xfe;
    for(i=0;i<8;i++)
    {
    P1=a;
    a=a>>1;
    ms_delay(500);
    }
    }
    }
    }

    void ibit_right()
    {
    unsigned char i,a;
    while(1);
    {
    if(S3==0)
    {
    a=0xfe;
    for(i=0;i<8;i++)
    {
    P1=a;
    a=a>>1;
    a=a+0x80;
    ms_delay(500);
    }
    }
    }
    }

    void even_segments()
    {
    unsigned char i,a[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};
    while(1);
    {
    if(S1==0)
    {
    for(i=0;i<=9;i++)
    {
    if(i%2==0)
    P2=a;
    ms_delay(500);
    }
    }
    }
    }

    void odd_segments()
    {
    unsigned char i,a[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};
    while(1);
    {
    if(S2==0)
    {
    for(i=0;i<=9;i++)
    {
    if(i%2==1)
    P2=a    ;
    ms_delay(500);
    }
    }
    }
    }

    void numbers()
    {
    unsigned char i,a[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};
    while(1);
    {
    if(S3==0)
    {
    for(i=0;i<=9;i++)
    {
    P2=a    ;
    ms_delay(500);
    }
    }
    }
    }

    void lcd_cmd()
    {
    data=ACC;
    RS=0;
    RW=0;
    E=1;
    ms_delay(10);
    E=0;
    }

    void lcd_data()
    {
    data=ACC;
    RS=1;
    RW=0;
    E=1;
    ms_delay(10);
    E=0;
    }

    void lcd_initialize()
    {
    ACC=0x38;
    lcd_cmd();
    ACC=0x38;
    lcd_cmd();
    ACC=0x38;
    lcd_cmd();
    ACC=0x06;
    lcd_cmd();
    ACC=0x0C;
    lcd_cmd();
    }

    void lcd_puts(unsigned char *a)
    {
    while(*a!=’’)
    {
    ACC=*a;
    lcd_data();
    a++;
    }
    }

    void PWM(unsigned char Ton)
    {
    motor=0;
    ms_delay(Ton);
    motor=1;
    ms_delay(100-Ton);
    }

    void clkwise()
    {
    unsigned char i;
    for(i=0;i<=5;i++)
    {
    A1=0;
    B1=C1=D1=1;
    ms_delay(250);

    B1=0;
    A1=C1=D1=1;
    ms_delay(250);

    C1=0;
    A1=B1=D1=1;
    ms_delay(250);

    D1=0;
    A1=B1=C1=1;
    ms_delay(250);
    }
    }

    void anticlkwise()
    {
    unsigned char i;
    for(i=0;i<=5;i++)
    {
    D1=0;
    A1=B1=C1=1;
    ms_delay(250);

    C1=0;
    A1=B1=D1=1;
    ms_delay(250);

    B1=0;
    A1=C1=D1=1;
    ms_delay(250);

    A1=0;
    B1=C1=D1=1;
    ms_delay(250);
    }
    }

    void main()
    {
    lcd_initialize();
    while(1);
    {
    if(S1==0)
    {
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“1BIT LEFTSHIFT”);
    ibit_left();
    }
    else if(S2==0)
    {
    ACC=0x01;
    lcd_cmd();
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“RIGHT SHIFT”);
    right_shift();
    }
    else if(S3==0)
    {
    ACC=0x01;
    lcd_cmd();
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“1BIT RIGHTSHIFT”);
    ibit_right();
    }
    while(1);
    {
    if(S1==0)
    {
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“EVEN NUMBERS”);
    even_segments();
    }
    else if(S2==0)
    {
    ACC=0x01;
    lcd_cmd();
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“ODD NUMBERS”);
    odd_segments();
    }
    else if(S3==0)
    {
    ACC=0x01;
    lcd_cmd();
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“DECIMALS”);
    numbers();
    }
    }
    while(1);
    {
    motor=0;
    sec_delay(10);
    motor=1;
    sec_delay(5);
    PWM(30);
    }
    while(1)
    {
    if(S1==0)
    {
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“MOTOR CLOCKWISE”);
    clkwise();
    }
    else if(S2==0)
    {
    ACC=0x01;
    lcd_cmd();
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“MOTOR ANTICLOCKWISE”);
    anticlkwise();
    }
    }
    }
    }

    Pls check this code

    August 22, 2011 at 3:04 pm #6622
    Ashish Angural
    Participant

    sorry for inconvenience it is because i had posted it from mobile thats why its look like this
    i can change it soon

    October 5, 2011 at 5:41 pm #6679
    Ashish Angural
    Participant

    check this…

     

     

    #include<reg51.h>
     
    #include<intrins.h>
     
    #define data P1
     
    sbit S1=P3^0;
    sbit S2=P3^1;
    sbit S3=P3^2;
    sbit motor=P3^3;
    sbit S4=P3^4;
     
    sbit RS=P2^0;
    sbit RW=P2^1;
    sbit E=P2^2;
     
    sbit A1=P0^0;
    sbit B1=P0^1;
    sbit C1=P0^2;
    sbit D1=P0^3;
     
    void ms_delay(unsigned int a)
    {
     unsigned int i,j;
     for(i=0;i<a;i++)
     {
      for(j=0;j<70;j++)
      {
       _nop_();
      }
     }
    }
     
    void sec_delay(unsigned int a)
    {
     unsigned int i,j;
     for(i=0;i<a;i++)
     {
      for(j=0;j<1000;j++)
      {
       ms_delay(1);
      }
     }
    }
     
    void ibit_left()
    {
     unsigned char i,a;
     while(1);
     {
      if(S1==0)
      {
       a=0xfe;
       for(i=0;i<8;i++)
       {
    P1=a;
    a=a<<1;
    a=a+0x01;
    ms_delay(500);
       }
      }
     }
    }
     
    void right_shift()
    {
     unsigned char i,a;
     while(1);
     {
      if(S2==0)
      {
       a=0xfe;
       for(i=0;i<8;i++)
       {
    P1=a;
    a=a>>1;
    ms_delay(500);
       }
      }
     }
    }
     
    void ibit_right()
    {
     unsigned char i,a;
     while(1);
     {
      if(S3==0)
      {
       a=0xfe;
       for(i=0;i<8;i++)
       {
    P1=a;
    a=a>>1;
    a=a+0x80;
    ms_delay(500);
       }
      }
      }
    }
     
    void even_segments()
    {
     unsigned char i,a[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};
     while(1);
     {
      if(S1==0)
      {
       for(i=0;i<=9;i++)
       {
    if(i%2==0)
    P2=a;
    ms_delay(500);
       }
      }
     }
    }
     
    void odd_segments()
    {
     unsigned char i,a[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};
     while(1);
     {
      if(S2==0)
      {
       for(i=0;i<=9;i++)
       {
    if(i%2==1)
    P2=a;
    ms_delay(500);
       }
      }
     }
    }
     
    void numbers()
    {
     unsigned char i,a[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x98};
     while(1);
     {
      if(S3==0)
      {
       for(i=0;i<=9;i++)
       {
        P2=a;
        ms_delay(500);
       }
      }
     }
    }
     
     
    void lcd_cmd()
    {
     data=ACC;
     RS=0;
     RW=0;
     E=1;
     ms_delay(10);
     E=0;
    }
     
    void lcd_data()
    {
     data=ACC;
     RS=1;
     RW=0;
     E=1;
     ms_delay(10);
     E=0;
    }
     
    void lcd_initialize()
    {
     ACC=0x38;
     lcd_cmd();
     ACC=0x38;
     lcd_cmd();
     ACC=0x38;
     lcd_cmd();
     ACC=0x06;
     lcd_cmd();
     ACC=0x0C;
     lcd_cmd();
    }
     
    void lcd_puts(unsigned char *a)
    {
     while(*a!=’’)
     {
      ACC=*a;
      lcd_data();
      a++;
     }
    }
     
    void PWM(unsigned char Ton)
    {
     motor=0;
     ms_delay(Ton);
     motor=1;
     ms_delay(100-Ton);
    }
     
    void clkwise()
    {
     unsigned char i;
     for(i=0;i<=5;i++)
     {
      A1=0;
      B1=C1=D1=1;
      ms_delay(250);
     
      B1=0;
      A1=C1=D1=1;
      ms_delay(250);
     
      C1=0;
      A1=B1=D1=1;
      ms_delay(250);
     
      D1=0;
      A1=B1=C1=1;
      ms_delay(250);
      }
    }
     
    void anticlkwise()
    {
     unsigned char i;
     for(i=0;i<=5;i++)
     {
      D1=0;
      A1=B1=C1=1;
      ms_delay(250);
     
      C1=0;
      A1=B1=D1=1;
      ms_delay(250);
     
      B1=0;
      A1=C1=D1=1;
      ms_delay(250);
     
      A1=0;
      B1=C1=D1=1;
      ms_delay(250);
     }
    }
     
    void main()
    {
     lcd_initialize();
     while(1);
     {
      if(S1==0)
      {
       ACC=0x80;
       lcd_cmd();
       lcd_puts(“1BIT LEFTSHIFT”);
       ibit_left();
      }
      else if(S2==0)
      {
       ACC=0x01;
       lcd_cmd();
       ACC=0x80;
       lcd_cmd();
       lcd_puts(“RIGHT SHIFT”);
       right_shift();
      }
      else if(S3==0)
      {
       ACC=0x01;
       lcd_cmd();
       ACC=0x80;
       lcd_cmd();
       lcd_puts(“1BIT RIGHTSHIFT”);
       ibit_right();
      }
      while(1);
      {
       if(S1==0)
      {
       ACC=0x80;
       lcd_cmd();
       lcd_puts(“EVEN NUMBERS”);
       even_segments();
      }
      else if(S2==0)
      {
       ACC=0x01;
       lcd_cmd();
       ACC=0x80;
       lcd_cmd();
       lcd_puts(“ODD NUMBERS”);
       odd_segments();
      }
      else if(S3==0)
      {
       ACC=0x01;
       lcd_cmd();
       ACC=0x80;
       lcd_cmd();
       lcd_puts(“DECIMALS”);
       numbers();
      }
      }
      while(1);
      {
       motor=0;
       sec_delay(10);
       motor=1;
       sec_delay(5);
       PWM(30);
      }
      while(1)
      {
       if(S1==0)
       {
       ACC=0x80;
    lcd_cmd();
    lcd_puts(“MOTOR CLOCKWISE”);
    clkwise();
       }
       else if(S2==0)
       {
       ACC=0x01;
    lcd_cmd();
    ACC=0x80;
    lcd_cmd();
    lcd_puts(“MOTOR ANTICLOCKWISE”);
    anticlkwise();
       }
      }
     }
    }
     
     
     
  • Author
    Posts
Viewing 5 posts - 1 through 5 (of 5 total)
  • You must be logged in to reply to this topic.

Search Engineers Garage