101-1121 Rabbit Semiconductor, 101-1121 Datasheet - Page 100
101-1121
Manufacturer Part Number
101-1121
Description
KIT CAMERA INTERFACE APPLICATION
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 3000r
Specifications of 101-1121
Sensor Type
Motion, PIR (Pyroelectric Infrared)
Interface
10/100 BaseT Ethernet
Embedded
Yes, Other
Utilized Ic / Part
RCM3365
Interface Type
Ethernet
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Voltage - Supply
-
Sensitivity
-
Sensing Range
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
316-1119
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B.4.6.2 RS-485
The Prototyping Board has one RS-485 serial channel, which is connected to the Rabbit
3000 Serial Port C through an RS-485 transceiver. The half-duplex communication uses
an output from PD7 on the Rabbit 3000 to control the transmit enable on the communica-
tion 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 C 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 Prototyping Boards with RCM3365/RCM3375 modules installed 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 B-8. Note that a common ground is recommended.
94
#define ser485open serCopen
#define ser485close serCclose
#define ser485wrFlush serCwrFlush
#define ser485rdFlush serCrdFlush
#define ser485putc serCputc
#define ser485getc serCgetc
#define CINBUFSIZE
#define COUTBUFSIZE 15
#ifndef _485BAUD
#define _485BAUD 115200
#endif
15
Figure B-8. Multidrop Network
PACKET.LIB
library.
RabbitCore RCM3365/RCM3375
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