Exp.3: Serial Communication with PIC18Fcontroller

CODE

#include<p18F4550.h>

#include<stdio.h>

#define Fosc 48000000UL

void InitUART(unsigned int baudrate)

{

TRISCbits.RC6 = 0; //TX pin set as output

TRISCbits.RC7 = 1; //RX pin set as input

SPBRG = (unsigned char)(((Fosc /64)/baudrate)-1);

BAUDCON = 0x00; // 8-bit baudrate generator

TXSTA = 0x20; //Asynchronous 8-bit; Transmit enabled

RCSTA = 0x90; //8-bit data; single receive enabled

}

void SendChar(unsigned char data)

{

while(TXSTAbits.TRMT == 0); //Wait while transmit register is empty

TXREG = data; //Transmit data

}

void putch(unsigned char data)

{

SendChar(data);

}

unsigned char GetChar(void)

{

while(!PIR1bits.RCIF); //Wait till receive buffer becomes full

return RCREG; //Returned received data

}

void main(void)

{

InitUART(9600);

printf("\r\nHello:\r\n");

while(1)

{

printf("%c"

,GetChar()); //Receive character from PC and echo back

}

while(1);

}