Serverip - TFTP server IP address - needed for tftp command. Ipaddr - IP address of the device - needed for tftp command. Normally, it is modified by the Ethernet driver, but you can change it if you want to override. This is the interface that will be tried first.Įthact - Sets the currently active Ethernet interface.
#LINUX U BOOT PC#
Usbnet_hostaddr - The virtual MAC address of the host (the PC side).Įthprime - Sets the primary Ethernet interface. Usbnet_devaddr - The virtual MAC address of the device (the board side). Now you should have a new Ethernet interface called usb_ether.īefore actually using it you should get to know the following environment variables: To enable it, you need to un-comment the defines of the following configs in include/configs/m圆var_som.h in the U-Boot source code: This is especially useful if you build a custom board without an Ethernet interface and you want to boot via network using TFTP. The USB Ethernet gadget allows you to make the board act as a USB Ethernet device when connecting its USB OTG/Client port to a host PC using a USB cable.īasically, it allows for "Ethernet over USB".
#LINUX U BOOT WINDOWS#
Note: You should use a Linux PC host as Windows can't naturally read ext file systems. To exit the ums command and disconnect the USB device press ctrl+c. If not, you can use dmesg to see the names of the device and its partitions (it should be in the form of /dev/sdXX) and mount them yourself. On a DART-MX6 SOM when booting from eMMC:ĭepending on your host PC, it may automatically mount it or not. On a DART-MX6 SOM when booting from SD card:
To do this you need to connect a USB cable between the OTG/Client port of the board and a regular USB Host port on your PC, and use U-Boot's ums command.ĭevtype can be any block device (e.g. This is especially useful for updating the internal eMMC. You can even use it to flash a new U-Boot, re-partition the storage, re-format it, etc.
#LINUX U BOOT FULL#
You will be able to access all the partitions of any block device that is on the board or connected to it, from your host PC - You will see them as /dev/sdXX, just like connecting a regular USB storage to your PC, and you'll be able to mount them, and have full read/write access to them. You can use the board as a USB Mass Storage device: If you want to add support for a different LCD that is not currently supported, you need to edit the displays array in board/variscite/m圆var_som/m圆var_som.c in the U-Boot source code, according to your LCD parameters. There is support for the three different 800x480 LCD screen types that Variscite uses. In case the rootfs is a UBIFS, mounting it in order to load the splash file will add ~1.8 seconds to the boot time.The splash image will be taken from whichever rootfs that is going to be mounted later at boot.The splash image is taken from /boot/splash.bmp in the root file system. To disable the splash screen, enter the following in the U-Boot command line interface: 4.3 Flashing the Linux device tree to NANDġ New features introduced in Variscite U-Boot 2015.04: 1.1 Splash ScreenĪ splash screen is enabled by default, and is shown on the LVDS LCD.3.1 List all supported commands and their description/usage (help command).1.7 DART-MX6 features previously missing.1.6 Choosing Root File System location when booting from NAND.1.5 Host/Client mode on VAR-MX6CustomBoard's micro-USB port.1 New features introduced in Variscite U-Boot 2015.04:.
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