gistfile1.txt

//Trasmitter

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

#INT_RDA  // Interrupt for recieve data      Only for USART Receive interupt     Triggered by proper USART packet receive
void int_rda_isr(){
   delay_ms(400);    // Do not put delays in interupts
   printf(lcd_putc, "\f %c", *RCREG);
   *TXREG=*RCREG+1;     // RCREG (8bits) is the receive register for the hardwired usart.
}
// RCREG = Data Receiver Register
// TXREG = Data Trasmit Register
main(){
   char x='A';
   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=x;
   while(1){
   //printf(lcd_putc, "\f hello");
  // *TXREG='A';
  // delay_ms(300);
   }
}