SIMPLEX COMMUNICATION USING RS-232 IN C (CHARACTER PASSING)

SIMPLEX COMMUNICATION USING RS-232 IN C (CHARACTER PASSING)

SIMPLEX CHARACTER TRANSMITER

#include<stdio.h>

#include<conio.h>

#include<bios.h>

#include<process.h>

#define COM1 0

main()

{

          char ch;

int choice;

                   char setting,baud = 0xe0,parity = 0x08,data = 0x04,stop = 0x03;

setting = baud | parity | data | stop;

                             clrscr();

                             bioscom(0,setting,COM1);

while(1)

{

                                             clrscr();

                                printf("\n  SERIAL COMMUNICATION USING RS-232 PROTOCOLS\n");

                                             printf(" 1: Char Transsmission...\t  2:Exit....\n");

              printf("\n                       Enter Choice :\n");

                                             scanf("%d",&choice);

                                          switch(choice)

                                          {

                                                          case 1:

                                                          do

                                                         {

                                                                   ch=getch();

                                                                   printf("%c",ch);

                                                                   outport(0x3F8,ch);

                                                           }

                                                           while(ch!=0x0d);

                                                           break;

                                                           case 2: exit(0);

                                           }

                             }

}

Output:

SERIAL COMMUNICATION USING RS-232 PROTOCOLS

 1: Char Transsmission...         2:Exit....

Enter Choice :

Darshikapatel

SIMPLEX CHARACTER RECEIVER

             #include<stdio.h>

#include<conio.h>

#include<bios.h>

#include<process.h>

#define COM1 0

#define DATA_READY 0x100

main()

              {

                   char ch1;

                   int status,choice;

char setting,baud = 0xe0,parity = 0x08,data = 0x04,stop = 0x03;

setting = baud | parity | data | stop;

clrscr();

bioscom(0,setting,COM1);

while(1)

{

                             clrscr();

                             printf("\n  SERIAL COMMUNICATION USING RS-232      PROTOCOLS\n");                 

                             printf("\n  Simplex Receiver\n");

printf(" \n 1: Char Receiver...\t  2:Exit....\n");                                                                            printf("\n                       Enter Choice :\n");

                             scanf("%d",&choice);

          switch(choice)

          {

case 1:

                                                     do

                                                     {

                                                status=bioscom(3,0,COM1);

                                                              if(status & DATA_READY)

                                                               {

                                                                         ch1 = inport(0x3F8);

printf(" %c",ch1);

                                                              }

                                                       }

                                                                while(ch1!=0x0d);

                                                       break;

                                                           case 2: exit(0);

                                           }

                              }

               }