Rabbit RCM3000 User Manual

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Contents

Rabbit RCM3000 User Manual Manual pdf 22 page image

14 RabbitCore RCM3000• SWITCHCHAR.C—This program demonstrates transmitting and then receiving anASCII string on Serial Ports B and C. It also displays the serial data received from bothports in the STDIO window.To set up the Prototyping Board, you will need to tie TxB and RxCtogether on the RS-232 header at J5, and you will also tie RxB andTxC together using the jumpers supplied in the Development Kit asshown in the diagram.Once you have compiled and run this program, press and release S2and S3 on the Prototyping Board. The data sent between the serial ports will be dis-played in the STDIO window.Two sample programs,SIMPLE485MASTER.C andSIMPLE485SLAVE.C, are available toillustrate RS-485 master/slave com-munication. To run these sample pro-grams, you will need a second Rabbit-based system with RS-485, and youwill also have to add an RS-485 trans-ceiver such as the SP483E and biasresistors to the RCM30/31/32XXPrototyping 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—This program demonstrates a simple RS-485 transmission oflower case letters to a slave RCM3000. The slave will send back converted upper caseletters back to the master RCM3000 and display them in the STDIO window. UseSIMPLE485SLAVE.C to program the slave RCM3000.• SIMPLE485SLAVE.C—This program demonstrates a simple RS-485 transmission oflower case letters to a master RCM3000. The slave will send back converted upper caseletters back to the master RCM3000 and display them in the STDIO window. UseSIMPLE485MASTER.C to program the master RCM3000.3.2.2 Other Sample ProgramsSection 6.11 describes the TCP/IP sample programs, and Appendix C.8 provides sampleprograms for the optional LCD/keypad module that can be installed on the PrototypingBoard.((( (%%%%; "! !"#Downloaded from Elcodis.com electronic components distributor