1 / 6

AT91SAM Android Demo Components

AT91SAM Android Demo Components. Linux Components & Functions. An Android system requires several components: Bootloader(s) Configure the memory system. Load the kernel image at the correct memory address. Optionally load an initial RAM disk at the correct memory address.

hamlet
Download Presentation

AT91SAM Android Demo Components

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. AT91SAM Android Demo Components

  2. Linux Components & Functions • An Android system requires several components: • Bootloader(s) • Configure the memory system. • Load the kernel image at the correct memory address. • Optionally load an initial RAM disk at the correct memory address. • Initialize boot parameters for the Linux kernel. • Obtain the ARM Linux machine type. • Android kernel image • Usually a compressed image is used (zImage) • Some bootloaders (Ex: U-Boot) do not support normal kernel image and have to convert it to another format. • Root file system • The kernel needs a root file system to mount at startup.It contains init program, applications, libraries, data….

  3. AT91SAM Linux components and functions • AT91 ROM code (embedded in the board) • Provide USB connection for SAM-BA • Determine where to boot the system • AT91 Bootstrap • Configure the memory system. • Low level hardware initialization • Load U-Boot image to RAM and run it. • U-Boot • Initialize network connection and flash read/write functions. • Load the kernel image at the correct memory address. • Initialize boot parameters for the Linux kernel. • Kernel • OS • Root FS • Applications • Libraries • UI

  4. AT91SAM Android boot sequence – SD CARD External Memories Internal Memories Partition 2: ext2 Root FS SAMBA Boot Android Kernel Android Kernel Partition1: FAT NVM Boot SD Card Boot SD Card Boot AT91Bootstrap AT91Bootstrap ROM SD CARD Physical Addr: 0x22xxxxx AT91Bootstrap AT91Bootstrap Android Kernel 0x00300000 DDRAM SRAM Current running Application in Red

  5. More information about AT91SAM OS Ecosystem AT91SAM Linux Ecosystem http://www.linux4sam.org AT91SAM Android Ecosystem http://www.at91.com/android4sam AT91SAM WinCE Ecosystem http://www.at91.com/windows4sam AT91SAM community forum http://www.at91.com

More Related