Page 71 - PDA Robotics Using Your Personal Digital Assistant to Control Your Robot

PDA 05 5/30/03 11:35 AM Page 47
Chapter 5 / The Electronics
Figure 5.6
Portion of
MCP2150 showing
baud rate lines
connected to DIP
switch.

Table 5.1
DIP Switch Settings and Associated Baud Rates

DIP Switch 1 DIP Switch 2 DIP Switch 3 DIP Switch 4 Baud Rate at
(Baud 0) (Baud 0) (Baud 1) (Baud 1) 11.0592 MHz
Off On Off On 9600
On Off Off On 19200
Off On On Off 57600
On Off On Off 115200

Figure 5.7 shows a close-up of the DIP switches with the baud of the
MCP2150 set to 115200.

The MCP2150 Connection to the IR Transceiver

The IR transponder used by PDA Robot consists of a Microchip
MCP2150 IrDA standard protocol stack controller and a Vishay
TFDS4500 serial IR transceiver (a TFDU6102 fast IR transceiver can be
used as well). The transceiver contains the IR emitter and receiver and
the MCP2150 handles the IrDA handshaking and data exchange
between the Robot and the PDA.

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