It is this repository that actually pulls in the oe-layersetup project to perform the Linux Processor-SDK builds for TI’s entire suite of ARM CortextA chips. In this document we are only concerned with the oe-layersetup project.

Generating SSH Keys

 We recommend you use SSH keys to establish a secure connection between your computer and Embedian Gitlab server. The steps below will walk you through generating an SSH key and then adding the public key to our Gitlab account. 

Step 1. Check for SSH keys 

 First, we need to check for existing ssh keys on your computer. Open up Git Bash and run: 

 Check the directory listing to see if you have a file named either id_rsa.pub or id_dsa.pub. If you don't have either of those files go to step 2. Otherwise, you already have an existing keypair, and you can skip to step 3.  

Step 2. Generate a new SSH key

 To generate a new SSH key, enter the code below. We want the default settings so when asked to enter a file in which to save the key, just press enter.

 Now you need to enter a passphrase.

 Which should give you something like this:

Step 3. Add your SSH key to Embedian Gitlab Server

 Copy the key to your clipboard.

Go to Embedian Git Server. At Profile Setting --> SSH Keys --> Add SSH Key 

Paste your public key and press "Add Key" and your are done.

Overview of the meta-smarct335x-sdk-02.00.01.07 Yocto Layer

The supplied meta-embedian-sdk7 Yocto compliant layer has the following organization:

Notes on meta-smarct335x-sdk-02.00.01.07 layer content

conf/machine/*

This folder contains the machine definitions for the smarct335x platform and backup repository in Embedian. These select the associated kernel, kernel config, u-boot, u-boot config, and UBI image settings.

recipes-bsp/u-boot/*

This folder contains recipes used to build DAS U-boot for smarct335x platform.

recipes-connectivity/lftp/*

This folder adds lftp ftp client utility for smarct335x platform. 

recipes-core/base-files/*

This recipe is used to amend the device hostname  for the platform.

recipes-core/busybox/*

This recipe modifies TI’s BusyBox configuration to remove telnet from the image.

recipes-core/images/*

These recipes are used to create the final target images for the devices. When you run Bitbake one of these recipes would be specified. For example, to build the root file system for the smarct335x platform:

This recipe is used to amend device network interfaces

recipes-devtools/nodejs/*

These recipes build the Node.js Javascript server execution environment.

recipes-kernel/linux/*

Contains the recipes needed to build the smarct335x Linux kernels.

recipes-support/boost/*

Adds Boost to the images. Boost provides various C++ libraries that encourage cross-platform development. 

recipes-support/ntp/*

Network time protocol support. 

recipes-tisdk/ti-tisdk-makefile/*

Add smarct335x device tree into Makefile.

Setting Up the Tools and Build Environment

To build the latest TI  AM335X Processor-SDK-02.00.01.07, you first need an 64-bit Unbuntu Linux 12.04LTS or Ubuntu 14.04LTS installation because of support for 32-bit host is dropped as Linaro toolchain is available only for 64-bit machines. A x86_64 ubuntu 14.04 is highly recommended. Since bitbake does not accept building images using root privileges, please do not login as a root user when performing the instructions in this section. 

Once you have Ubuntu 12.04 LTS or Ubuntu 14.04LTS running, install the additional required support packages using the following console command:

If you are using a 64-bit Linux, then you'd also need to install 32-bit support libraries, needed by the pre-built Linaro toolchain and other binary tools.

pkg: error: unknown option --add-architecture

ls /etc/dpkg/dpkg.cfg.d/

multiarch

$ sudo sh -c "echo 'foreign-architecture i386' > /etc/dpkg/dpkg.cfg.d/multiarch"

You’ll also need to change the default shell to bash from Ubuntu’s default dash shell (select the <No> option):

 To build TI’s am335x Processor-SDK-02.00.01.07 you will need to install the Linaro arm compiler that TI used for the release: