Digilent Ethernet Module - Manual (Page 2)

Digilent, Inc TM
Ethernet Module Reference Manual
www.digilentinc.com
© Digilent, Inc. Page 2 of 2
The firmware in the Ubicom chip can be
modified using the Ubicom UNIVDNET kit
available from Ubicom. Digilent does not offer
any independent method or user support for
modifying the firmware.
Module Initialization
Before the Ethernet Module can be used, it
must be associated with a unique ID tag so
that the Digilent Adept software can locate it.
The Adept software can locate a module using
any one of three ID tags: an alphanumeric
name; a MAC address; or an IP address.
Before the module can be connected to a
general network, it must also be assigned a
unique IP address. Digilent provides an
“Ethernet Administrator” tool as a part of the
Adept software that can be used to assign ID
tags, including an IP address (see the Digilent
Adept Reference Manual for more information).
The Ubicom chip is configured with a unique
MAC address during manufacturing. The MAC
address is printed on a sticker affixed to the
board. By default, DHCP service is enabled on
the module, so that IP addresses and a subnet
mask can be automatically assigned from a
DHCP server when the board is first attached
to a network. If a DHCP server is not available,
then the subnet mask and IP address stored in
the Ubicom part will be used. The default
subnet and IP settings are shown below. Note
these settings may not be suitable for a given
installation, and they may need to be changed
(using the Ethernet Administrator) before the
module can be used.
Default settings on the module are:
• Module ID (DModNet1)
• IP address (192.168.0.2)
• Subnet mask (255.255.255.0)
• Default Gateway (0.0.0.0)
• DHCP setting (enabled)
These default settings can be automatically
restored at any time by loading a shorting
block on the Configuration Reset Jumper (JP1)
and power-cycling the board.
If the Ethernet Module fails to respond, the IP
address and subnet mask may not be
compatible with the current subnet. In this
event, the Configuration Reset jumper should
be shorted to restore factory defaults.
Connecting to Module
After the Ethernet module has been initialized,
it is ready to be used by applications. To use
the module either for JTAG programming or
user data transfers, it must first be identified
within the Adept software. Modules are
identified by adding one or more of their ID
tags to a “Device Table” list. This list is
accessed through the “Communications
Module” dialog box in Adept Suite (see the
Digilent Adept Reference Manual for more
information). Once the module has been
identified, JTAG programming and user data
transfers can commence.
Application Software
Digilent provides a Software Development Kit
that contains the DLLs, APIs, and necessary
Windows drivers to allow users to create their
own application software to transfer data to a
system board over the Ethernet. Digilent also
provides two application programs that can be
used to transfer data. These applications,
called Export (used for JTAG programming)
and Transport (for user data transfers) are
available as a part of the Adept software. See
the Digilent Software Development Kit
Reference Manual and Digilent Adept
Reference Manual for more information on
these applications.
User I/O
The Ethernet Module contains several I/O
devices, including an “ID” pushbutton, a
configuration reset jumper, and three status
LEDs.