Printf("ERROR: failed to initialize video!") Memset(&lcd_panel, 0, sizeof(struct am335x_lcdpanel)) For a comprehensive list of all possible directives you can use in nf. Memcpy((void *)panel, (void *)&pnltmp, sizeof(struct am335x_lcdpanel)) conf is located, as exemplified in the U-Boot documentation. So, a configuration may very well exist for your target already. The package includes a number of preset configurations for quite a few boards. Before you can build U-Boot, you need to configure it for your target. It is usually documented in the SoC's reference manual, and it does describe the various conventions (where to read u-boot from, specific addresses) the u-boot port specific to this SoC should follow in order to the code in ROM to be able to load u-boot, and ultimately transfer control to u-boot. Int load_lcdtiming(struct am335x_lcdpanel *panel) The documentation provided with U-Boot discusses its use of the physical memory of targets. It depends on the SoC, and the scheme used for booting will differ from one SoC to the other. Gpio_direction_output(GPIO_BACKLIGHT_EN, 1) Gpio_direction_output(GPIO_BACKLIGHT_EN, 0) Gpio_request(GPIO_BACKLIGHT_EN, "backlight_en") U-Boot init sequence U-Boot will run two lists of functions whose purpose is to init or configure specific IPs before the user have access to the console, the first list is defined incommon/boardf. #if defined(CONFIG_LCD) & defined(CONFIG_AM335X_LCD) & \ If using ISC dhcpd an example host entry would look like this: BoardĭM814x ROM (PG1.0) or AM335x ROM (PG2.0 and later) Spl/u-boot-spl.bin and u-boot.img files to boot. Vendor-class-identifier DHCP field is filled out by the ROM and the In addition, the DHCP server is needed to reply to the target In some cases, a special build of U-Boot may be In some cases we support loading SPL and U-Boot over the network because Use the following table to determine what defconfig to use to configureģ.1.1.4.1. However first configure the build for the board you are working with.
conf file, the mender-uboot feature is already on by default.
For instance, in your nf: By inheriting the mender-full-ubi class in a Bitbake.
U BOOT DOCUMENTATION HOW TO
Information are provided to show how to use a specific feature, whenįinally, please note that not all boards have all of the interfacesīuilding of both u-boot and SPL is done at the same time. To utilize Mender's integration with U-Boot, when building with the Yocto Project you need to enable the mender-uboot feature using MENDERFEATURESENABLE. U-Boot Processor SDK Linux Documentation 3.1. Servers is also outside of the scope of this document, but snippets of Linux Kernel has already been built (or has been provided) as well as anĪppropriate filesystem image.
U BOOT DOCUMENTATION SOFTWARE
Some attention has been paid to make this software easily configurable and extendable.
U BOOT DOCUMENTATION SERIAL
Serial port for the board has been configured. The development of U-Boot is closely related to Linux: some parts of the source code originate in the Linux source tree, we have some header files in common, and special provision has been made to support booting of Linux images. We assume that a GCC-based toolchain has already been installed and the
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