User`s manual

OEM User’s Manual 63
Once you have compiled the sample program and it is running, LED DS1 will go on
with a brief toggle off when a ping is sent. LED DS1 will go off for a longer duration
when a ping is received. LED DS1 is controlled by PD0.
• PINGLED_WPA2_CCMP.C—This sample program demonstrates the use of WPA2 PSK
(Wi-Fi Protected Access with Pre-Shared Key).). WPA is a more secure replacement
for WEP. The implementation in the sample program uses the Advanced Encryption
Standard (AES) based algorithm, also known as the CCMP (Counter Mode with Cipher
Block Chaining Message Authentication Code Protocol) cypher suite.
Apart from the configuration of WPA2_CCMP at the top of the sample program, the rest
of the code is identical to the case without WPA2 PSK. Indeed, most of the TCP/IP
sample programs should work with WPA2 CCMP simply by using the same configura-
tion settings.
Configure your access point for WPA2 PSK before you run this sample program.
Specify the CCMP cypher suite, and enter a suitable pre-shared key. The key may be
entered either as 64 hexadecimal digits or as an ASCII string of up to 63 characters.
Authentication should be set to “open system,” which basically means that knowingt
the key is sufficient to allow access.
TIP: There is a good chance of typos since the key is long. First, enter the key in this
sample program macro, then copy and paste it to your access point. This ensures that
both the RCM5600W and the access point have the same key.
TIP: For an initial test, it may be easier to use the 64 hex digit form of the key rather than
the ASCII passphrase. A passphrase requires considerable computation effort, which
delays the startup of the sample program by about 30 seconds.
Now change PING_WHO and IFC_WIFI_SSID to the host and SSID you want to ping.
You may modify PING_DELAY to change the amount of time in milliseconds between
the outgoing pings.
Uncomment the VERBOSE define to see the incoming ping replies.
Once you have compiled the sample program and it is running, LED DS1 will go on
with a brief toggle off when a ping is sent. LED DS1 will go off for a longer duration
when a ping is received. LED DS1 is controlled by PD0.