5x7 Led Dot Matrix using 8051 (Programming in C )

Discussion in 'Embedded Systems and Microcontrollers' started by jibranjin, Aug 11, 2011.

  1. jibranjin

    Thread Starter New Member

    Dec 10, 2010
    4
    0
    Guys i m making a Scrolling text using 5x7 display with 8051 but i m having a problem that i m unable to figure out that how to scroll a text i wrote this test code but it keeps displaying 'A' .. plz can sumbody tell me what is the prob with this code...... i ll very thankful.....



    #include<reg51.h>
    int count[5]={0x08,0x10,0x20,0x40,0x80};
    int A[5]= {0x7F,0x98,0x98,0x7F,0x00};
    int Blank[5]= {0x0F,0x00,0x00,0x00,0x00};
    int c;
    int i,j ;
    int z;


    void delay(unsigned int msec) // Function to provide time delay in msec.
    {

    for(i=0;i<msec;i++)
    for(j=0;j<1275;j++);

    }

    void scroll() interrupt 1
    {

    TL0=0x36; //Reloading Timer0
    TH0=0xA6;
    for(z=0;z<5;z++){

    P2=~A[z];
    P3=count[z];
    delay(1);
    P2=0xFF;
    }

    }


    void main ()
    {
    TMOD=0x11; //Intialize Timer 0
    TL0=0x36; //Reloading Timer0
    TH0=0xA6;
    IE=0x82; // Enable Timer 0 interrupt
    TR0=1; //Start Timer 0



    while(1){




    for (c=0;c<5;c++){
    delay(100);
    for (z=0;z<4;z++){
    A[z]=A[z+1];
    }

    A[4]=Blank[c];
    }
    }
    }

    View attachment 4.zip

    View attachment ISIS Professional - C__Documents and Settings_Administrator_Desktop_counter_matrix_4.DSN.pdf


    i also Attached Schematic's proteus file ...... and its pdf
     
Loading...