BL4S200 User’s Manual
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Once the PC or notebook is set up, we're ready to communicate. You can use Telnet or a
Web browser such as Internet Explorer, which come with most Windows installations, to
use the network interface, and you can use HyperTerminal to view the serial port when
these are called for in some of the later sample programs.
Now we’re ready to run the sample programs in the Dynamic C
Samples\TCPIP\WiFi
folder. The sample programs should run as is in most cases.
6.2.4 Wi-Fi Sample Programs
The sample programs in Section 6.2.4.1 show how to set up the country- or region-specific
attributes, but do not show the basic setup of a wireless network. The sample programs in
Section 6.2.4.2 show the setup and operation of a wireless network — the
WIFISCAN.C
sample program is ideal to demonstrate that the BL5S220 has been hooked up correctly
and that the Wi-Fi setup is correct so that an access point can be found.
6.2.4.1 Wi-Fi Operating Region Configuration
The country or region you select will automatically set the power and channel require-
ments to operate the BL5S220. The following three options are available.
1.
Country or region is set at compile time.
This option is ideal when the end device is
intended to be sold and used only in a single region. If the end device is to be deployed
across multiple regions, this method would require an application image to be created for
each region. This option is the only approved option for the BL5S220 in Japan.
2.
Country or region is set via the 802.11d feature of the access point.
This option uses
beacons from an access point to configure the BL5S220 country or region automati-
cally. The end user is responsible for enabling 802.11d on the access point and then
selecting the correct country to be broadcast in the beacon packets.
NOTE:
This option sets the power limit for BL5S220 to the maximum level permitted in
the region or the capability of the BL5S220, whichever is less. Since the beacons are
being sent continuously, the
ifconfig IFS_WIFI_TX_POWER
function cannot be
used with this option.
3.
Country or region is set at run time.
This is a convenient option when the end devices
will be deployed in multiple regions. A serial user interface would allow the BL5S220 to
be configured via a Web page. Systems integrators would still have to make sure the
end devices operate within the regulatory requirements of the country or region where
the units are being deployed.
These options may be used alone or in any combination. The three sample programs in the
Dynamic C
Samples\WiFi\Regulatory
folder illustrate the use of these three options.
•
REGION_COMPILETIME.C
—demonstrates how you can set up your BL5S220-based
system at compile time to operate in a given country or region to meet power and chan-
nel requirements.
The country or region you select will automatically set the power and channel require-
ments to operate the BL5S220. Rabbit recommends that you check the regulations for
the country where your system incorporating the BL5S220 will be deployed for any
electronic components distributor
