32 GR-LEON4-ITX Development Board
Quick Start Guide
There is no known workaround for this issue and the LEON4-ASIC-DEMO device cannot be
used in a system where it will be accessed by a master performing bursts over eight words in
length.
I
2
C communication does not work
Please make sure that the bus has pull-ups (see the GR-LEON4-ITX Board User Manual for
how to enable pull-ups).
My USB disk is not detected / does not work
The board may not be able to provide enough power for drives connected via USB. Try
connecting the device via a USB hub that has a power source.
How do I change the Ethernet Debug Link IP address in the delivered system?
The system is delivered pre-programmed with the bootloader U-boot. After system reset, U-
boot will initialize the system, which includes setting the Ethernet Debug Communication
Link's (EDCL) IP address. The address used by U-boot can be changed by attaching a USB
keyboard and pressing any key during the first seconds of system boot. U-boot will then
interrupt the boot process and show a prompt.
The IP address that U-boot will assign to the EDCL is stored in the variable greth_edcl_ip0.
To show the systems variables, issue the command:
=> printenv
To change the EDCL IP address to 172.16.0.24, issue the command:
=> setenv greth_edcl_ip0 172.16.0.24
To preserve the value after system reset the variable needs to be saved to SPI flash, this is
done with the command:
=> saveenv
It is also possible to change the EDCL IP address via GRMON, using the edcl command.
However, this will not affect the address used by U-boot after system reset.
6.3 Additional support
For customers with a support contract, or for issues where the board or device seem faulty,
please contact support@gaisler.com.
© Aeroflex Gaisler AB June 2010, Rev. 0.2
