/* main.c */

/* decimal counter with multiplexed output */

#pragma SMALL DB
#include <reg51.h>

/* P0, P1, P2 and P3 are predefined port names and are bit addressable */

unsigned char SetDisplay(unsigned char value){
    
    unsigned char LookupTable[11] = { 0xC0, ... };
	
    /* check to see if "value" is in bounds */
    if( ) {
	/* return appropriate value */
    }
    else {
	/* return appropriate value */
    }
}


/* Delay function */         
void delay() {         
    int i;           
                       
    for(i=0; i<1000; i++){ 
	i = i + 0;         
    }                     
}                   


void main(void){
    unsigned char count = 0;    /* holds value to be displayed */
    unsigned long timer = 0;	/* Holds the display so that it doesn't count to fast */
    int turn = 1;               /* indicates if we display the ones 
                                   place or the tens place */
    
    while(1) {
        if(turn){
	    /* configure P3 to turn on the one's place display */
	    /* display the one's value using P2*/
	    turn = 0;
	    delay();
	    
	}
	else{
	    /* configure P3 to turn on the ten's place display */
	    /* display the ten's value using P2*/
	    turn = 1;
	    delay();
	    
	}
	
        if(timer == 50){
	    /* update the count value */
	    /* The 'timer' variable controls how long a certain number is displayed */
	    /* When it displays a number--for example 12--fifty times, then you */
	    /* need to add the code to increment the counter so that it displays the */
	    /* next number--like 13--which will be displayed fifty times */	    
	    timer=0;
	}

	timer++;	
    }
}