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» Lab » Half-Duplex Serial <-> Infra-Red Converter
| Project: | Half-Duplex Serial <-> Infra-Red Converter |
| Source Code: | None |
| PIC: | None |
| Interface: | SerialPIC & InfraPIC |
| Author: | Ravi Deo |
| Last Updated: | 7th April 2005 |
Project Description
This sample project demonstrates how to use the wired SerialPIC interface with the wireless InfraPIC interface, to
create a half-duplex RS232 <-> Infra-Red Converter. In the above Lab setup, this converter allows a
terminal emulator on the PC to communicate via the RS232 serial port, with the Palm PDA via the infra-red port.
In a half-duplex system, only one device can transmit at any one time. Unlike a full-duplex system, where both devices
can transmit and receive concurrently.
In the schematic below, the Rx and Tx wires are crossed, as there is no intermediate PIC micro.
The SirPic Communication and Options settings should be configured as shown below.
The terminal emulator should be configured for the COM port being used, and communication settings
should match that of the Palm.
Power up both modules, and begin logging data on SirPic and the terminal emulator.
Using the grafitti pad, enter "A", this should be locally echoed on the PDA screen, and displayed
on the terminal emulator.
Similarly pressing the key "B" on the terminal emulator, should be locally echoed on the screen,
and displayed on the PDA screen..
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