Hand Held Products 7200/UG - Manual (Page 102)

C H A P T E R 7 U S I N G T H E D O L P H I N 7 2 0 0 H O M E B A S E
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Setting the Baud Rate
You may use the HomeBase Configuration utility program to select the baud rate. The
program can also be used to change the host system’s COM port and will run a
diagnostic check for optimal communications. After changing the baud rate, you must
power the HomeBase off and then on again. The program is one of the utility
programs that come with the Dolphin OS and Development System. For more on
HomeBase Configuration, see the chapter 8.
Modes of Operation
Through the Command Mode, the host application software provides command
instructions for configuring a single Dolphin HomeBase or a network of HomeBases
for communications. Once configured, the HomeBase(s) is in Transparent Mode and
ready for communications.
Command Mode
You can configure a single Dolphin HomeBase or a whole network and select units
for communications via the host application by entering the Command Mode. Data
transmission is not possible while the Dolphin HomeBase network is in this mode.
Go into Command Mode by entering an escape sequence that informs the HomeBase
network that it will be receiving commands from the host device or application. The
escape string is:
<ESC>HHP
where <ESC> is an ASCII 27 character. The escape string should be surrounded by a
100 millisecond period of line silence. When sending commands, the escape string
must precede the command string. The HomeBase automatically exits Command
Mode after receiving each command.
Programming commands used for configuring single Dolphin HomeBases include
Version Number and Baud Rate Selection. You configure HomeBase networks using
the Baud Rate Selection, Address Assignment and Device Selection programming
commands. See the sections on Configuring A Single Dolphin HomeBase and Creating a
HomeBase Network for details.
Transparent Mode
When the Dolphin HomeBase is selected by the host application and ready for
communications, it is in Transparent Mode. In this mode, the HomeBase facilitates
point-to-point communication between the host device and the Dolphin Terminal.
Data sent through the RS-232 link is passed directly to and from the Dolphin Terminal
via the Infrared Link between the terminal and the HomeBase.