CC3100 Transceiver Mode Application

Overview and application details

This is a sample application demonstrating how to use CC31xx's transceiver mode of operation. This is the ability of a device to send data directly over the WLAN MAC layer without being connected to a WLAN AP.

Two use-cases that are shown in the example code are:

• TX Continuous: In this mode, the SimpleLink device is able to communicate directly over the Wi-Fi PHY layer, .i.e. bypass the Network Stack, Wi-Fi driver and MAC layer. In this mode, the user is given with a full flexibility in building the transmitted packet.

Note: : User is fully responsible for building the transmitted packet. If it is desired to build a proprietary protocol on top of Wi-Fi PHY layer, then the user should be familiar with Wi-Fi MAC layer specifications and build the packet appropriately.

• RX Statistics: Main purpose is to provide major medium statistics.

Statistics provided by CC3100 are:

• Received Packets: The number of packets sampled.
• Received FCS: The number of packets received that had frame check sequence errors.
• Received Address Mismatch Error: The number of packets received that had Address Mismatch errors.
• Average RSSI for Management/Other Packets: The average signal strength of the management packets or data packets.
• RSSI Histogram: A histogram showing the signal strength of the different packets during the collection period.
• Rate Histogram: A histogram of the transmission rate of the different packets.
  The rates corresponding to the numbers can be found in the RateIndex_e enum in the wlan.h header file.
• Sample Time: The amount of time spent gathering samples.

More details on Transceiver Mode are available at CC3x00 Transceiver Mode Page

Note: This wiki page is only applicable for CC3100-SDK v1.0.0 and upward releases. For documentation on older SDKs' examples, refer corresponding file in <cc3100-sdk-installation-location>\cc3100-sdk\docs\examples\

Usage

• Connect the board to a Windows-PC and configure the terminal-program for seeing the logs - [| CC31xx_&_CC32xx_Terminal_Setting_Wiki] has detailed instructions for configuring the terminal-program
• Build and run the project using CCS
• Connect a sniffer and filter the packets based on configured MAC/IP address.

• See the self explanatory logs on the terminal-program's console. On success, below message will be displayed on the terminal

Limitations/Known Issues

• TX continuous mode works in WiFi disconnected mode only
• The user needs to make sure the connection policy is not set to auto/fast mode
• Complete RX statistics can be obtained in disconnected mode only, however this feature can be used to get the get the RSSI of the AP the device is connected to.
• When sl_recv() API is invoked in transceiver mode, the SimpleLink device remains in RX mode and doesn't go to low power mode

Links

{{#invoke: Navbox | navbox }} {{#invoke: Navbox | navbox }}