2
Atmel AVR2040
8381B-AVR-09/11
OFF
Power switch
ON
Plug each REB vertically into the 2x20 female Expand1 connector header on the
CBB:
•
Ensure that the pin 1 marking on the REB header aligns with the corresponding
pin 1 marking on the CCB Expand1 connector header
•
The top side of the REB, which has the radio transceiver and antenna, should be
facing towards the batteries on the CBB
3 Simple range measurement
The pre-flashed performance test suite on the REB231ED evaluation kit assemblies
features a simple range measurement application. Each assembly operates in a
standalone manner, and is able to transmit or receive data frames. A successful
transmit or receive operation is indicated by a blinking LED.
3.1 Power up the assemblies
Apply power to both REB-CBB assemblies
by switching on the power switch located on
the top side of the CBB. The assemblies run
a power-on check, and indicate the
successful completion by switching on the
second of the three LEDs, LED-D2.
3.2 Run simple range measurement application
Choose one of the REB-CBB assemblies, and press button T1
to start the simple range measurement application.
First, the REB-CBB initiates a connection and configuration
procedure by sending broadcast frames and waiting for a
response from the second REB-CBB. After a successful
configuration, the REB-CBBs turn on LED-D1 to indicate that
status. Afterwards the initiator starts to transmit data frames immediately. Each data
frame transmission is indicated by blinking the TX status LED-D2. A successful data
frame reception on the second node is indicated by blinking the RX status LED-D3.
The RX status LED stops blinking if no data frames are received, such as when, for
example, the node has left the communication range. Data frame transmission can be
stopped by pressing T1 once more on the node transmitting frames.
Moreover the REB-CBBs can transmit and receive frames simultaneously. Pressing
button T1 on both nodes initiates each node to transmit frames. The three LEDs
indicate their respective functions: LED-D1 a successful configuration, LED-D2
transmission and LED-D3 reception.
NOTE
The node configuration gets lost when resetting or switching off the REB-CBB power
supply. To restart the simple range measurement, a reset or power cycle has to be
applied to both REB-CBB assemblies before pressing T1 on one (or both) REB-
CBB(s) to restart the application.
4 Packet error rate measurement
The pre-flashed performance test suite is also configured with packet error rate (PER)
measurement functionality (as defined in IEEE
®
802.15.4), enabling the user to
explore various radio transceiver features, radio transceiver registers, and
performance by tuning with customized configurations. For this application, one REB-
CBB needs to be connected to a PC.
D3 D2 D1 T1
RX TX configuration
status