AvaLAN Wireless AW900mSPI-10 - Manual (Page 38)

AW900mSPI User’s Manual
PAGE 38 Technical support (650) 384-0000 www.avalanwireless.com
21. The "Send File" button may be used to transmit contents of a file. Please be
aware that the UART interface lacks flow control and long data files will not be
transferred successfully.
22. Data that is sent will appear in the large black box in green. Data that is re-
ceived will also appear here in cyan. This information is also accumulated and
may be saved to a file on your PC with the "Save Log to File" button. The log will
be cleared and a new one started by clicking "Clear Log" or by disconnecting
and reconnecting the COM port.
23. Under certain circumstances, changing the configuration after exchanging data
with the Data Terminal may cause the boot config COM port to hang. When this
happens, the status bar at the bottom of the utility window will show "Cannot
read from target on COMx. [The operation has timed out.] If this happens,
cycle power on the Evaluation unit with the black power switch on the board
and try the operation again.
24. There is a second utility available called EvkUtilityLite that removes the Data
Terminal functionality for those who prefer to use hyperterminal or some oth-
er application to interface with the Data Port but still need to control boot
configuration and retrieve status information. Download it from our website:
www.avalanwireless.com/sw/EVK_Utility_Lite.zip. If you activate the "ping
pong" mode by turning on DIP Switch 11, you can see the statistics change as
the radios exchange their random data.
Next Steps
You can connect your microcontroller circuitry to the AW900mSPI without unsolder-
ing it from the Evaluation Board by attaching your wiring to the probe points and
leaving the USB disconnected. Use DIP Switch 2 to control whether UART (off) or SPI
(on) firmware is loaded at bootup or use a 10K resistor pull up or pull down on pin 8
as described in the Technical Summary on page 5.
Also available on our website are some additional resources to help you with your
own product development:
• AvaLAN’s driver C Source Code (for an ARM7, use at your own risk)
• Evaluation Board schematics
• Evaluation Board Gerber layout files
Just follow the links on www.avalanwireless.com/downloads.htm .