Other Sample Programs - Rabbit RCM3000 User Manual

•
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
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
•
SIMPLE485MASTER.C
lower case letters to a slave RCM3000. The slave will send back converted upper case
letters back to the master RCM3000 and display them in the
SIMPLE485SLAVE.C
•
SIMPLE485SLAVE.C
lower case letters to a master RCM3000. The slave will send back converted upper case
letters back to the master RCM3000 and display them in the
SIMPLE485MASTER.C

3.2.2 Other Sample Programs

Section 6.11 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.
14
Downloaded from Elcodis.com electronic components distributor
—This program demonstrates transmitting and then receiving an
window.
STDIO
STDIO window.
and
, are available to
—This program demonstrates a simple RS-485 transmission of
to program the slave RCM3000.
—This program demonstrates a simple RS-485 transmission of
to program the master RCM3000.
485+
Vcc
DI
A
PC0
RO
PC1
DE B
PD4
/RE
GND
485–
STDIO
STDIO
RxC TxC
TxB RxB GND
Vcc
681 W
bias
termi-
220 W
nation
bias 681 W
window. Use
window. Use
RabbitCore RCM3000