1.2. Building the SDK
1.2.1. Build PC setup
Please refer to the following pages from Android documentation to setup your environment for Android build:
Getting the repo tool
You will need the repo
tool to retrieve repositories.
To install it, please refer to this webpage : https://source.android.com/setup/develop#installing-repo
1.2.2. Downloading sources
Create a folder for downloading all sources
$ mkdir ~/10_01_00 && cd $_
$ export YOUR_PATH=$PWD
Fetch the code using repo
:
$ mkdir ${YOUR_PATH}/ti-aosp-15 && cd $_
$ repo init -u https://git.ti.com/git/android/manifest.git -b android15-release -m releases/RLS_10_01.xml
$ repo sync
Tip
By default the Android build contains pre-built binaries for both the kernel
and the bootloaders.
The pre-builts are located in in device/ti/am62x-kernel
and vendor/ti/am62x/bootloader
folder.
To get the sources, refer to:
Downloading sources for kernel
Downloading sources for bootloaders
1.2.3. Build Instructions
$ cd ${YOUR_PATH}/ti-aosp-15
$ source build/envsetup.sh
$ lunch <BUILD_TARGET>
$ m
[...]
#### build completed successfully (49:14 (mm:ss)) ####
Where <BUILD_TARGET>
is listed in the table below :
Android Build type |
Build target |
---|---|
AM62PX-SK Tablet userdebug |
|
AM62PX-SK Tablet user |
|
AM62PX-SK Car userdebug |
|
AM62PX-SK Car user |
|
The recommended <BUILD_TARGET>
to use is am62p-ap3a-userdebug
.
It’s possible to customize the standard build (m
), by passing build flags.
For example, the following enables AVB on userdebug builds:
$ TARGET_AVB_ENABLE=true m
The following build flags are available. Default values are highlighted.
Flag |
Possible values |
Description |
---|---|---|
|
false/true |
Forces AVB feature on userdebug |
|
false/true |
Forces enable ADB on user builds (NOT for production builds) |
|
false/true |
Boot from SD card instead of eMMC |
After building is complete, the necessary images will be available in
$YOUR_PATH/ti-aosp-15/out/target/product/am62*/
.
To proceed to flash Android, see Flashing Instruction.
Tip
As stated previously, Android build contains pre-built binaries for both the kernel and the bootloaders. These are ready to be used as-is with the EVM boards. For customization, it’s possible to rebuild them.
See Build Instructions for the kernel
See Build Instructions for the bootloaders