Type the command ipconfig from a command prompt.
LEGO U BOOT DOWNLOAD
In order for the DE1-SoC to download the correct RBF file from the TFTP server, we need to know the IP address of your lab PC. In ECE453, we will be using a TFTP server running on your lab PC. You can do this by running the ifconfig command and looking at the address returned in the blue box below. After logging in, determine the IPV4 address that was assigned to your DE1-SoC. After resetting the board, allow it to boot into Linuxĩ.
LEGO U BOOT MAC
You will need to arbitrarily pick a MAC address that is going to be unique on your network. The DE1-SoC does not have a dedicated MAC address assigned to its ethernet port. Note: If you are not in ECE453, then your board will not have a MAC address printed on it. This is a unique value, so make sure you use the value on YOUR board! You can set this environment variable using the following command (where XX is the value found on your board):
LEGO U BOOT SERIAL
You can do this by pressing enter in the serial terminal. Stop the boot process before Linux begins to boot.Open up Tera Term/Putty/Moba Xter/or your favorite serial terminal program.Plug in an Ethernet cable to your DE1-SoC.Plug in your micro USB cable to the Serial Debug port.
TFTP SetUpīefore we get to writing a U-Boot script to TFTP boot the DE1-SoC, we will need to make use of the U-Boot command prompt. After you have built a new FPGA image, all you have to do is restart the DE1-SoC and U-Boot will automatically download the new image. TFTP booing the DE1-SoC board allows you to build new FPGA images and program the FPGA without having to remove the microSD card from the DE1-SoC itself. In order to understand some of the motivation behind compiling a U-Boot script, you will develop a U-Boot script that will give you the option to TFTP boot the DE1-SoC. Using a compiled script is a more systematic approach that allows us to better manage changes to the default environment and roll back any changes that resulted in unwanted results. The results is that a seemingly minor change in a single environment variable can lead to problems in the boot loader and result in a system that does not boot. In fact, many environment variables are nested within other environment variables. So if you can configure U-Boot from the command line, why would you take the time to compile a U-Boot script? Most U-Boot environments have a large number of environment variables. The resulting file will then be loaded at start up and the commands will be executed as they appear in the script. U-Boot parameters can be set using the U-Boot command line, but instead of manually setting the parameters at the command line, we are going to add the U-Boot commands to a script and compile the script. When using U-Boot, there is a set of configurable parameters stored in U-Boot that affect how the CPU will be initialized.
0 kommentar(er)
