Aero-Flex GAISLER GR-LEON4-ITX Manuel D’Utilisation
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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
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).
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
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
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.
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,
© Aeroflex Gaisler AB
June 2010, Rev. 0.2