gistfile1.txt

#include <18f4520.h>
#use delay(clock=20000000)
#fuses HS, NOWDT, NOLVP
#include "../Library/18f4520ptr.h"
#include "../Library/KeypadC1.h"
#include "../Library/modifiedlcd.h"

float Vres=5.0/1023.0;
float Voltage, Voltage1;
float Vmin=0;

#INT_AD
void int_ad_isr(){
   Voltage=*Q*Vres-Vmin;
}

main(){
   int16 press1, press2, VoltagePer;
   lcd_init();  
   ADCON0->ADON=1;   
   ADCON0->CHSx=0;   
   ADCON1->PCFGx=0x0F;  
   *TRISA=0x0F;      // port A input
   *TRISB=0xF0;   
   *TRISC=0x00;   
   ADCON2->ADFM=1;   //RJ
   //Enable References
   ADCON1->VCFG0=1;  
   ADCON1->VCFG1=1;  
   //Interupt Setup
   PIE1->ADIE=1;  
   INTCON->GIE=1; 
   INTCON->PEIE=1;   
   INTCON2->RBPU=0;  
   while(1){
      press1=(int16)KeyPress()-0x30;  //Takes the ASCII value from the keypress and removes the hex value.
      Voltage1=((Voltage/5)*100);  // Converts voltage from pot to a % value.
      if(press1<=9 && press1>=0){
         press2=((press2*10)+press1);
         if(press2>100){
            press2=0;
         }
      }
      printf(lcd_putc,"\f %2.0f", (Voltage1-press2));
      printf(lcd_putc,"\n %1.2fV  %lu", Voltage, press2);
      ADCON0->GODONE=1;    //Go
      delay_ms(300);
   }
}