Rockwell Automation D17846.2.4 CONTROLNET KT EMULA - Manual (Page 36)

Publication 1784-6.2.4 - September 1997
B-2 Defined Statements for the KTCX Card
Structures that Access the
KT Dual-port These structures are used to provide easier access to the KT dual-port
and are referenced by the example code sections in the previous
sections.
Important: The following example code is written in Borland C,
version 3.1.
--------------------------------------------------------
File Name: kt.h
Application: KT Emulator for the KTCX Card.
Description: Header file for the KT Emulator
--------------------------------------------------------
#indef KT_H
#define KT_H
#define KT_VERSION 0x07 // This value goes up at dp+7F9
#define KT_TxInt (1<<0) // Bit Mask for Tx Interrupts
#define KT_RxInt (1<<1) // Bit Mask for Rx Interrupts
#indef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
---------------------------------------------------------
/*Dual-port STRUCTURES */
/* These are structures that allow easy access to dual-port bytes */
/* for each of the different dual-port configurations (loaders, diagnostics etc.) */.
-------------------------------------------------------------
/* For use during communications ( the first two are sub-structures*/
typedef struct
{
signed char shake1; /* First handshake byte */
signed char shake2; /* Second handshake byte */
int len; /* Length of packet, starting with unused1 below */
char unused1[2];
char dst;
/* Destination node address of packet */
char unused2[2]; /* CNTL and TYPE, neither of which are used in KT */
char lsap; /* LSAP */
char data[1024-6]; /* The rest of mailbox (880 less the above) */
}SENDBOX;
typedef struct
{
signed char shake1; /* First handshake byte */
signed char shake2; /* Second handshake byte */
int len; /* Length of packet starting with src */
char src; /* Destination of packet */
char lsap; /* LSAP */
char data[880-6]; /* The rest of the mailbox (880 less the above) */
}RCVBOX;