communication

in need of help · 12-27-2002

hi im trying to do serial communication between two computers using bioscom. I have two graphics programs in a win 32 environment not DOS.

Basically if i press a key say a 4 on the keyboard on one of the computers i need it to go thru the communications line and carry out a function in the program on the other computer. My problem is i dont know how to send a character to the other computer and get it to act as if a key was hit on that computer. and take input and carry out a function.

I know bioscom only deals with characters and as im sending integers i need to translate them using itoa......but how do i do it all?

ive established communication between the computers using

Code:

#include <bios.h>

#define DATA_READY 0x100

#define SETTINGS ( 0x80 | 0x02 | 0x00 | 0x00)


int main (void){

int COM1 = 0;
int status, OK=0;

        printf("\t\t\tSetting up communications");
        printf("\n\n\nEnter Communication port being used: ");

        scanf("%d", &COM1);
        COM1--;

        bioscom(0, SETTINGS, COM1);  
        status=bioscom(3, 0, COM1);

        if (status & DATA_READY){
        printf("communication OK - any key to continue");
        OK=1;

         getch();
         }

          return 0;
}

i've looked all over the net and thru books but i cant find anything that i understand

plz can someone help me?

in need of help · 12-27-2002

because i was told that i have to use bioscom

but i dont know how to....

**ronin** · 12-27-2002

I got this from Borland's library reference book (watered down for length) for _bios_serialcom if it will be of any use.

Code:

#define com1 0
#define DATA_READY 0x100
#define TRUE 1
#define FALSE 0
#define SETTINGS (_COM_1200 | _COM_CHR7 | _COM_STOP1 | COM_NOPARITY)
...// main
unsigned in, out, status;
_bios_serialcom(_COM_INIT, COM1, SETTINGS);
for(;;)
{
    status = _bios_serialcom(_COM_STATUS, COM1, 0);
    if(status & DATA_READY)
        if((out = _bios_serialcom(_COM_RECIEVE, COM1, 0) & 0x7F) != 0)
            putch(out);
     in = getch();
     _bios_serialcom(_COM_SEND, COM1, in);
}
../ end main

I'd expect that in could also be used to send one byte at a time from a string using something like

Code:

char string[] = "test string";
int i;

for(;;) // from Borland's code
 {
for(i = 0; string[i] != '\0'; i++)
_bios_serialcom(_COM_SEND, COM1, string[i]);

I haven't tried that myself, but I'd be interested in knowing if any part of it works. Good luck.

**bigtamscot** · 12-27-2002

It is ammazing what you can find on google, and this is one of many hits....

http://www.delorie.com/djgpp/doc/libc/libc_68.html

this one looks what you maybe after

http://www.ontrak.net/c.htm

and the search took the same time to type this reply..hope it helps.

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