4-20 mA using pic 16f72

/****************************************************************
1) RA0 is selected as input channel
2) Source is connected to RA0 pin on kit, by varying it we can have ADC result which is displayed on PORTC.
3) GO/DONE bit must be set before monitoring it for going low.
******************************************************************/




void main() {
     //int arr[10] = {0x5f,0x06,0x3b,0x2f,0x66,0x6d,0x7d,0x47,0xff,0x6f};
     
     unsigned int temp, i,x,y,z,no1,no2,no3;
     
     TRISA = 0xff;      //Set port A direction as i/p
     //TRISA = 0x00;        //Port A as output
     PORTA = 0X00;        //ALL BITS OFF
     TRISB = 0x00;        //Set port B as output
     TRISC = 0x00;        //Set PORT C as output

     ADCON0 = 0X00;       //CLOCK SELECTION Fosc/2 AND ANALOG CHANNEL SELECTION channel RA0 as input
     ADCON1 = 0X00;       //ALL CHANNELS AS ANALOG INPUT Vref is VDD
     

     //PORTA.A1 = 1;        //PORT A0 as input

     PORTB.B1 = 1;          //4 FND's are connected on PORT B1, B2, B3, B4
     PORTB.B2 = 1;
     PORTB.B3 = 1;
     PORTB.B4 = 1;

                PORTC = 0xFF;
                Delay_ms(1000);
                PORTC = 0x00;
                Delay_ms(1000);

                               while(1)

                               {
                                       ADRES = 0x00;
                                       ADCON0.ADON = 0x01;                 //Turn on the ADC
                                       ADCON0.GO = 1;
                                       while(ADCON0.GO == 1);             //Wait till conversion is goin on
                                       ADCON0.GO =0                                      
                                       ADCON0 = 0x00;                         // Stop the ADC
                                      
                                       //PORTC = ADRES;

                                                 temp = ADRES;
                                                 //x = temp/10;
                                                 no1 = temp%10;
                                                 //temp = x%10;
                                                 no2 = temp/10;
                                                 no2 = no2%10;
                                                 no3 = temp/100;
                                                 
                                                 //PORTC = no1 | 0x30;
                                                 PORTC = no1;
                                                 Delay_ms(1000);
                                                 //PORTC = no2 | 0x30;
                                                 PORTC = no2;
                                                 Delay_ms(1000);
                                                 //PORTC = no3 | 0x30;
                                                 PORTC = no3;
                                                 Delay_ms(1000);
                                                 
                                       

                                       Delay_us(2);    //Call delay 2 microseconds;
                               }

}