101-0521 Rabbit Semiconductor, 101-0521 Datasheet - Page 28

• Manufacturer Part Number: 101-0521
• Description: MODULE RABBITCORE RCM3210
• Manufacturer: Rabbit Semiconductor

Specifications of 101-0521

• Module/board Type: MPU Core Module
• For Use With/related Products: RCM3210
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 101-521; 101-521

•
Two sample programs,
SIMPLE485MASTER.C
SIMPLE485SLAVE.C
illustrate RS-485 master/slave com-
munication. To run these sample pro-
grams, you will need a second Rabbit-
based system with RS-485, and you
will also have to add an RS-485 trans-
ceiver such as the SP483E and bias
resistors to the RCM30/31/32XX
Prototyping Board.
The diagram shows the connections. You will have to connect PC0 and PC1 (Serial Port D)
on the RCM30/31/32XX Prototyping Board to the RS-485 transceiver, and you will con-
nect PD4 to the RS-485 transceiver to enable or disable the RS-485 transmitter.
The RS-485 connections between the slave and master devices are as follows.
• RS485+ to RS485+
• RS485– to RS485–
• GND to GND
•
•
3.2.2 Other Sample Programs
Section 6.5 describes the TCP/IP sample programs, and Appendix C.8 provides sample
programs for the optional LCD/keypad module that can be installed on the Prototyping
Board.
22
SWITCHCHAR.C
ASCII string on Serial Ports B and C. It also displays the serial data received from both
ports in the
To set up the Prototyping Board, you will need to tie TxB and RxC
together on the RS-232 header at J5, and you will also tie RxB and
TxC together using the jumpers supplied in the Development Kit as
shown in the diagram.
Once you have compiled and run this program, press and release S2
and S3 on the Prototyping Board. The data sent between the serial ports will be dis-
played in the
SIMPLE485MASTER.C
lower case letters to a slave RCM3200. The slave will send back converted upper case
letters back to the master RCM3200 and display them in the
SIMPLE485SLAVE.C
SIMPLE485SLAVE.C
lower case letters to a master RCM3200. The slave will send back converted upper case
letters back to the master RCM3200 and display them in the
SIMPLE485MASTER.C
STDIO
STDIO
—This program demonstrates transmitting and then receiving an
, are available to
window.
window.
and
—This program demonstrates a simple RS-485 transmission of
to program the slave RCM3200.
—This program demonstrates a simple RS-485 transmission of
to program the master RCM3200.
STDIO
STDIO
RabbitCore RCM3200
window. Use
window. Use
W
W
W