please suggest a board based on the following for learning linux

Hi,

I have a decent theoritical understanding on Uboot,board bring up, device driver development. To get practical understanding I bought Friendly Arm mini2440 board. But it was difficult for me with that as I could not change the software source to learn.

Please suggest a board in which I can get
1) Toolchain for that board.
2) Uboot source code supporting that so that I can Cross compile that Uboot on my own and creating binary and porting facility.
3) Linux Kernel Source code supporting that so that I can configure and cross compile that kernel on my own,modify the device drivers and create image and porting facility.
4)Root filesystem source with that I can pickup my required utilies and features/applications and compile and make rootfs image with my desired rootfs type eg) jffs2,squashfs to experiment on my own and port from host.
5)Support for debugging the board.
6)Having In built display or support to connect any external display as additional peripheral. If the display dont have touch facility then it should support keyboard as peripheral.
7)should have networking abilities atleast Ethernet.
8)Also datasheets of the components should be available so that I can develop device drivers on my own and experiment.
9)Android support is preferrable.

I am asking these because I want to learn the process and flow from bootloader stage to Application starting and running and then shutdown of system practically.

Please reply!

http://www.friendlyarm.net/products/mini2440

http://www.famosastudio.com/download...440_manual.pdf

Seems like an option existing in a few car infotainment systems. But not much more than a networked monitor. A 400MHz 32 bit arm processor that likely lacks any specialties like hard float. Low power is about it's only perk. It would be far simpler to learn a raspberry pi with the official 7" LCD that comes with it, than that thing as a first baptism by fire.

Hi Shadow 7,

In Raspberry pi forum when I have enquired we cant use Uboot at all and root file system content of our own.

The Uboot source code supplied with download section of Friendly Arm when cross compiled and created the binary does not work. In their forum as of now I could get only the working uboot binary but not it's corresponding source code and waiting for it. It would of great help if you let me know where I can get that working uboot binary's source code. Also If I get any guide to pickup and compile only the required features and applications in the root file system content for my own learning it would be great as I am having that board already.

You could build uboot on a pi, which would simplify things. But as you said you cannot boot uboot on the RPi, which uses the GPU to boot the board. Which isn't the way that most other arm units do things. The friendly arm board doesn't have much ram and a slow CPU, you're definitely in embedded land on that thing. Learning it might not have much value if you have other choices. Since things like a raspberry pi exists and is far less "embedded". The official 7" display for the RPi is $60-ish. Which puts it around the same price point as the friendly arm board with display.

Originally Posted by ayyasprings 1) Toolchain for that board.

Irrelevant reguirement.
There's crosstool-NG to build a custom GCC toolchain.
If you're in a rush, you can download a pre-built toolchain from GNU ARM, Linaro, Sourcery CodeBench, or maybe your PC's distro.

Originally Posted by ayyasprings 2) Uboot source code supporting that so that I can Cross compile that Uboot on my own and creating binary and porting facility.

U-Boot is licensed under the GPL, so if it's used/distributed in binary form, then the source code should be available .

Originally Posted by ayyasprings 3) Linux Kernel Source code supporting that so that I can configure and cross compile that kernel on my own,modify the device drivers and create image and porting facility.

Linux is licensed under the GPL, so if it's used/distributed in binary form, then the source code should be available.

Originally Posted by ayyasprings 4)Root filesystem source with that I can pickup my required utilies and features/applications and compile and make rootfs image with my desired rootfs type eg) jffs2,squashfs to experiment on my own and port from host.

An unreasonable requirement since there is no consolidated repository of "root filesystem source".
Tools such as Buildroot and Yocto are used to solve this issue.

Originally Posted by ayyasprings 6)Having In built display or support to connect any external display as additional peripheral. If the display dont have touch facility then it should support keyboard as peripheral.

Rather vague requirement.
Display output could range from composite video (analog 480i) to HDMI (digital 1080p). Interface connection could be standard HDMI connector to a 50-pin FPC connector for LVDS.
Touchscreen interface could be raw input requiring A-to-D conversion or external converter with a USB connection.
A dedicated keyboard interface is deprecated; that's one of the reasons for USB.

Originally Posted by ayyasprings 7)should have networking abilities atleast Ethernet.

Rather common for a development board, unless you're looking at something small and/or cheap intended for IOT.

Originally Posted by ayyasprings 8)Also datasheets of the components should be available so that I can develop device drivers on my own and experiment.

This requirement disqualifies RPi and similar *Pi boards that use Broadcom or Allwinner SoCs.
TI, NXP/Freescale, and Atmel provide datasheets/TRMs for their SoCs consisting of 1000+ pages.

Originally Posted by ayyasprings The Uboot source code supplied with download section of Friendly Arm when cross compiled and created the binary does not work.

Be aware that the toolchain can be a factor, especially with boot programs. Even the Linux kernel has compile-time checks for "bad" gcc versions.

The installation instructions that involve the `nand scrub` command are dangerous.
See these proper instructions for NAND.

Beagleboard's use u-boot. There are instructions how to build it on their website.

So don't the boards from SolidRun, such as Hummingboard and CuBox.