Atmel AVR2070 5 Running the RUM Demo

20 AVR2070 8240B-AVR-06/09

5 Running the RUM Demo

Now that all the platforms have been properly configured with RUM, operating the

RUM demo without IPv6 is described in this section. It is assumed there is only one

PAN Coordinator per network and the PAN Coordinator can be either the

AT91SAM7X-EK board with radio interface, or another small AVR 8-bit based

platform described in section 2 (see Appendix E for third-party platforms).

Note:

If an AVR based platform is selected, there is no Ethernet interface

directly supported, just the optional serial interface. Therefore, any

Telnet and Webserver communication will not be available for network

control.

A PAN Coordinator will start a network by first locating a clear channel to begin

operations on. The PAN Coordinator will select a random PAN_ID, unless a static one

has been defined during compile time, and will begin accepting association requests

from router and end nodes. This mechanism is very similar to that described in

section 5.3 of the IEEE 802.15.4-2006 specification.

5.1.1 Network Formation

The network formed by the RUM protocol is a non-beaconing network. After the PAN

Coordinator has selected a channel to operate on, other nodes can begin to join the

network. The PAN Coordinator will issue beacons in response to beacon requests.

When a node wishes to join the network, it will send an association request to the

PAN Coordinator and the PAN Coordinator will respond with an association response.

From this, the node will retrieve its own short address. For more details about the

RUM protocol, see Appendix A.

5.1.2 Application Interface

The typical user interface to a running system with the SAM7X is the telnet menu

described in table 5-1. If an AVR platform is used as the PAN Coordinator, a different

menu is available via a serial interface described in table 5-2. The simple web server

will show a simple network table and allow the user to ping a specific node.

In order to communicate with the SAM7X telnet menu via the default IP address, see

section 4.4 for a description on how to configure the SAM7X and the local PC.

5.1.3 Main Menu

The telnet and serial menu selections are meant to be self descriptive however a

more detailed description is offered here.

Note:

Many of these are only available with the compile flag APP=SENSOR.

Also, for the ARM some of these require the compile flag

IPV6LOWPAN=1.