gistfile1.txt

// Challenge 4 Microcontolers Fall 2015 Josh Held
#include <18f4520.h>
#use delay(clock=20000000)
#fuses HS, NOWDT, NOLVP
#include "../../Library/18f4520ptr.h"
#include "../../Library/Keypad.h"
#include "../../Library/modifiedlcd.h"
int16 press1, press2;
float incoming, outgoing;

//Trasmitter code
#INT_RDA  // Interrupt for recieve data      Only for USART Receive interupt     Triggered by proper USART packet receive
void int_rda_isr(){
   incoming=*RCREG;
   printf(lcd_putc, "\f Current RPM %2.2f", incoming);
   *TXREG=press2;
}
// RCREG = Data Receiver Register
// TXREG = Data Trasmit Register
main(){
   lcd_init();
   *TRISC-0x80;
   TXSTA->TXEN=1; // Tx On
   TXSTA->SYNC=0; // Asynch
   TXSTA->BRGH=0; // Low Speed
   RCSTA->SPEN=1; // Rx On          RCSTA is setting up two interupts.
   RCSTA->CREN=1; // Rx Cont. on
   BAUDCON->BRG16=1;       // Setting baud rate based off of table.
   *SPBRG=129; // setting the interupt
   PIE1->RCIE=1;  // Rx Interupt Enable
                  // If Tx Enable is ON it wont work.
   INTCON->GIE=1;
   INTCON->PEIE=1;
   *TXREG=press2;

   //Keypad 2 digit
   *TRISB=0xF0;
   ADCON1->PCFGx=0x0F;// All Digital
   INTCON2->RBPU=0;

   while(1){

   press1=(int16)KeyPress()-0x30;  //Takes the ASCII value from the keypress and removes the hex value.
      if(press1<=9 && press1>=0){   // Filters out any value other than 0-9
         press2=((press2*10)+press1);  // Takes the first press, saves it for use when adding press1 to press2
         if(press2>100){   // if the press2 value is greater than 100 reset press2 to 0 value.
            press2=0;
         }
      }
      printf(lcd_putc,"\n %lu", press2);   //Print Pot voltage, print keypad value.
      delay_ms(200);
   }
}