RabbitCore eDisplay OP7200, Руководство пользователя

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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);