101-0600 Rabbit Semiconductor, 101-0600 Datasheet - Page 35

• Manufacturer Part Number: 101-0600
• Description: COMPUTER SNGLBD BL2510 512K FLSH
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0600

• Module/board Type: Single Board Computer Module
• For Use With/related Products: BL2510
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3.5.2 RS-485
The Coyote has one RS-485 serial channel, which is connected to the Rabbit 3000 Serial
Port D through an RS-485 transceiver. The half-duplex communication uses PA4 to con-
trol the transmit enable on the communication line. Using this scheme a strict master/slave
relationship must exist between devices to insure that no two devices attempt to drive the
bus simultaneously.
Serial Port D is configured in software for RS-485 as follows.
The configuration shown above is based on circular buffers. RS-485 configuration may
also be done using functions from the
The Coyote can be used in an RS-485 multidrop network spanning up to 1200 m (4000 ft),
and there can be as many as 32 attached devices. Connect the 485+ to 485+ and 485– to
485– using single twisted-pair wires as shown in Figure 15. Note that a common ground is
recommended.
User’s Manual
#define ser485open serDopen
#define ser485close serDclose
#define ser485wrFlush serDwrFlush
#define ser485rdFlush serDrdFlush
#define ser485putc serDputc
#define ser485getc serDgetc
#define DINBUFSIZE
#define DOUTBUFSIZE 15
#ifndef _485BAUD
#define _485BAUD 115200
#endif
Figure 15. Coyote Multidrop Network
15
PACKET.LIB
library.
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