Introduction
Serial
communication is a way enables different equipments to communicate with their
outside world. It is called serial because the data bits will be sent in a
serial way over a single line.
A personal computer has a serial port
known as communication port or COM Port used to connect a modem for example or
any other device, there could be more than one COM Port in a PC.
Advantages of Serial Communication
Serial
communication has some advantages over the parallel communication. One of the
advantages is transmission distance, serial link can send data to a remote
device more far then parallel link. Also the cable connection of serial link is
simpler then parallel link and uses less number of wires.
Serial link is used also for Infrared
communication, now many devices such as laptops & printers can communicate
via inferred link.
Example coding for Serial Communication:-
#include <pic.h>
#use delay(clock=20000000)
#fuses hs,nowdt,nolvp,noprotect, nobrownout
#use rs232(baud=9600,xmit=pin_c6,rcv=pin_c7, parity=n)
void main()
{
int count=0;
while(true)
{
printf("\f**Welcome to Malaysia**\n\r");
printf("**counter value is %u **", count);
count+=1;
delay_ms(1000);
}
}
Compiler: PIC C Compiler
