Rabbit OP7100 User Manual download pdf (Page 117)

User’s Manual 111

4.7 RabbitNet Port

The function calls described in this section are used to configure the OP7200 for use with

RabbitNet peripheral boards. The user’s manual for the specific peripheral board you are

using contains additional function calls related to the RabbitNet protocol and the individ-

ual peripheral board.

Add the following lines at the start of your program.

#define RN_MAX_DEV 10 // max number of devices

#define RN_MAX_DATA 16 // max number of data bytes in any transaction

#define RN_MAX_PORT 1 // max number of serial ports

Set the following bits in RNSTATUSABORT to abort transmitting data after the status byte is

returned. This does not affect the status byte and still can be interpreted. Set any bit com-

bination to abort:

bit 7—device busy is hard-coded into driver

bit 5—identifies router or slave

bits 4,3,2—peripheral-board-specific bits

bit 1—command rejected

bit 0—watchdog timeout

#define RNSTATUSABORT 0x80

// hard-coded driver default to abort if the peripheral board is busy

Provides rn_init() with the serial port control information needed for OP7200 series controllers.

RETURN VALUE

None.

Deactivates the OP7200 RabbitNet port as a clocked serial port and restores the RS-485 driver for

RS-485 communication. This call is also used by rn_init().

PARAMETERS

portnum = 0

RETURN VALUE

None

void rn_sp_info();

void rn_sp_close(int port);

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Rabbit OP7100 User Manual Page 117