Go4Expert - Seven Segment display source code AID plz help !!

I've been asked to make a Seven segment display based project:

Objectives:

Interface segments display components with HCS12 controller, chose port A for carrying data and port E for segment activation.

I need this (Interface a keypad in port B and write program to restart the display content when there is a key press.)

Display all Alphabets and numerals in scrolling mode.

I've done so far this much and am lost with the keypad part will you please help me out !!:confused:

Source Code:

Code:

#include <hidef.h>      /* common defines and macros */

#include <mc9s12e128.h>     /* derivative information */





#pragma LINK_INFO DERIVATIVE "SampleS12"



void delay (int);

void delay (int x) {

  int y;

  while (x>0)  {

    

    for (y=0;y<5000;y++) {

      ;

    }

    x--;

  }

}



void portInit (void) ;

  

  void portInit() {

    

    

    PORTE = 0X00;

    DDRE = 0XFF;

    PORTA= 0X00;

    DDRA = 0XFF;

    

     

  }



void main(void) {

void segment_display(char s ) ; 



char alpha[] = {0X08,0X03,0X46,0X21,0X06,0X0E,0X10,0X09,0X79,0X71,0X7F,0X47,

0X7F,0X2B,0X40,0X0C,0X7F,0X0F,0X12,0X07,0X41,0X7F,0X7F,0X7F,0X11,0X7F

};

char segment[]={0X80,0X00};

char size ;

unsigned int disp;



char name[]="CALEDONIANZCOLLEGEZOFZENGINEERING";

portInit() ;



  



  /* put your own code here */

  EnableInterrupts;

  for(;;) {

  PORTE = PORTA ;

  

  for(size=0;name [size] !='\0';size++) {

    for (disp=0;disp<34;disp++){

      PORTE = segment[0] |alpha[name[size]-65];

      delay(20);

      

      PORTA = segment[1] |alpha[name[size+1]-65];

      delay (20);

      

      PORTE = segment[2] |alpha[name[size]-65];

       delay (20);

       

      PORTA = segment[3] |alpha[name[size+1]-65];

      delay (20);

      

      PORTE = segment[4] |alpha[name[size]-65];

       delay (20);

       

      PORTA = segment[5] |alpha[name[size+1]-65];

       delay (02);

       

      PORTE = segment[6] |alpha[name[size]-65];

       delay (20);

       

        PORTA = segment[7] |alpha[name[size+1]-65];

       delay (20);

       

       

    }

  }

  } /* wait forever */

}

please mail me the solution to:
*

naturist.life@hotmail.com

thank you in advance