Rockwell Automation 5370 Color CVIM Communications Manual - Manual (Page 131)

Chapter 5
Using the RS–232 Ports
5–63
/* This sample program was Compiled using Microsoft C Verision 6.0 */
/* Color CVIM RS–232 Comminication example program using DF1 protocol */
/* Copyright Allen–Bradley 09–10–92 jrm, aes, dms */
#include <stdio.h>
#include <stdlib.h>
#include <bios.h>
#define STX 0x02 /* Start of Text character */
#define ETX 0x03 /* End of Text character */
#define DLE 0x10 /* Data Link Escape (Control char) */
#define ACK 0x06 /* Positive acknowledgement */
#define NAK 0x15 /* Negative acknowledgement */
#define COMMFLAGS 0x8000 /* defines bits to check for comm error */
unsigned char config[213][128]; /* define storage for configuration data
*/
unsigned char configlen[213]; /* define storage for configuration length
*/
unsigned char last_response = 0; /* define the last responce counter */
void main()
{
int x, op_num, portnum, err, replen, reslen, numblocks;
unsigned char reply[200], results[128];
/* Display Program Execution and Description. */
printf (”\nColor CVIM RS–232 Communication example program using ”);
printf (”DF1 protocol.\n”);
printf (”Copyright Allen–Bradley 09–10–92 jrm, aes, dms.\n”);
printf (”This program was used and tested on an Allen–Bradley ”);
printf (”T47 computer.\n”);
printf (”The Color CVIM communication Parameters for this program
are:\n”);
printf (” CFG Host: RS–232 A\n”);
printf (” SYS Host: RS232 A\n”);
printf (” Trigger Source = (Hosted)\n”);
printf (” RS232 A Protocol = DF1\n”);
printf (” RS232 A Baud Rate = 9600\n”);
printf (” Color CVIM must be in RUNMODE\n”);
/* Get Serial port number from the user */
printf (”\nEnter port number (1 for COM1 or 2 for COM2): ”);
scanf (”%d”, &portnum);
/* Open comm channel to Color CVIM at 9600 baud */
_bios_serialcom (_COM_INIT, portnum–1, _COM_CHR8 | _COM_STOP1 |
_COM_NOPARITY | _COM_9600);
DF1 Programming Example
(cont’d)