7 segment display interface with LPC2148 : embedded C program with code

 

Circuit Diagram:

Source Code:

#include <LPC214x.H>                      

unsigned char dig[] = {0x88,0xeb,0x4c,0x49,0x2b,0x19,0x18,0xcb,0x8,0x9,0xa,0x38,0x9c,0x68,0x1c,0x1e};

void delay(unsigned int count)

{

  int j=0,i=0;

  for(j=0;j<count;j++)

  {

    for(i=0;i<120;i++);

  }

}

int main (void)

{

unsigned char count=0;

unsigned int i=0;

IO0DIR |= (1 << 11);        //Set Digit control lines as Outputs

IO0SET = (1 << 11);

IO0DIR |= 0x007F8000;

  while(1)

 {

                                count++;

                                if(count ==16) count = 0;

                                for (i=0; i < 100; i++)        //change to inc/dec speed of count

                                 {

                                  IO0CLR = 0x007F8000;

                                  IO0SET = (dig[count] << 15);

                                 delay(200);

                                }                             

  }

}