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• Build AOSP: Pixel 5 (redfin) with Android 13
  • Environment
  • Download AOSP source code
  • Download driver binaries
  • Build AOSP
  • Unlock phone
  • Troubleshooting
  • Reference
• Develop AOSP: Bluetooth
  • Bluetooth Repository
  • Tools
  • Develope flow
  • Develop & Debug skill

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Build AOSP: Pixel 5 (redfin) with Android 13

Environment

• PC
  • CPU: i7-12700 (8 P-core + 4 E-core)
  • RAM: 32 GB
  • Disk: 1 TB SSD
  • OS: Ubuntu LTS 22.04 with required packages
    • Kernel: 5.17.0 (Note: Kernel 6.XX might induce AOSP build error)
    • Swap: 16 GB (Note: Set enough swap to avoid AOSP OOM build error)
  • Software
    • ADB: 33.0.3 (Note: How to update the newest ADB)
    • Fastboot: 33.0.3 (Note: Fastboot 34.0.1 might induce flash error)
• Phone
  • Pixel 5

Download AOSP source code

Follow official tutorial and choose a tag.

I choose tag android-13.0.0_r67 for my Pixel 5, and the correspoding build ID is TQ3A.230805.001

1. Create a folder for AOSP source code

mkdir ~/aosp && cd ~/aosp

2. Init with tag android-13.0.0_r67

repo init -u https://android.googlesource.com/platform/manifest -b android-13.0.0_r67

3. Sync

repo sync -j8

Download driver binaries

1. Download driver binaries according to the AOSP source code build ID and tag. I download binaries with build ID TQ3A.230805.001 for my Pixel 5 according to the tag android-13.0.0_r67.
   
   

wget https://dl.google.com/dl/android/aosp/google_devices-redfin-tq3a.230805.001.a2-59031497.tgz
wget https://dl.google.com/dl/android/aosp/qcom-redfin-tq3a.230805.001.a2-94c5e420.tgz

2. Unzip to your AOSP source code folder

tar xvfz google_devices-redfin-tq3a.230805.001.a2-59031497.tgz
tar xvfz qcom-redfin-tq3a.230805.001.a2-94c5e420.tgz

3. Run script

source extract-google_devices-redfin.sh
source extract-qcom-redfin.sh

Build AOSP

Follow official tutorial

1. Setup

source build/envsetup.sh

2. Choose a target to lunch. I choose aosp_redfin-userdebug for my Pixel 5.
   
   

lunch aosp_redfin-userdebug

3. Enable compile_commands.json, which let you efficiently trace C/C++ code with VS code installed with clangd extension

export SOONG_GEN_COMPDB=1
export SOONG_GEN_COMPDB_DEBUG=1

4. Build all images

m -j8 2>&1 | tee build_aosp_redfin_userdebug.log

Unlock phone

Follow official tutorail

1. Enable OEM unlocking and USB debugging in Developer options
   

   

2. Reboot to bootloader

adb reboot bootloader

3. Unlock

fastboot flashing unlock

4. Flash (Note: fastboot will flash img in $ANDROID_PRODUCT_OUT folder to your phone)

fastboot flashall -w

5. Boot to Android homescreen
   
   

Troubleshooting

If your Pixel phone is bricked, using physical button to force reboot your phone to bootloader, and flash factory img with official tool.

Reference

1. https://c55jeremy-tech.blogspot.com/2019/04/aosppixel-2-romrom.html
2. https://zhuanlan.zhihu.com/p/574856795
3. https://source.android.com/docs/automotive/start/pixelxl

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Develop AOSP: Bluetooth

Bluetooth Repository

packages/modules/Bluetooth/

Tools

• Android Code Search
• Gitiles
• Gerrit

Develope flow

1. Modify code
2. Build Bluetooth package and dependency

mmma packages/modules/Bluetooth/ -j8 2>&1 | tee build_bt.log

3. According to TEST_MAPPING file, use Atest to run instrumentation test, unit test or GTest

• Instrumentation test

atest BluetoothInstrumentationTests -v 2>&1 | tee BluetoothInstrumentationTests.log

• GTest

atest bluetooth_le_audio_client_test -v 2>&1 | tee bluetooth_le_audio_client_test.log

4. Manual test: replace Bluetooth apex and manually verify your change

adb root
adb remount
adb install out/target/product/redfin/system/apex/com.android.btservices.apex
adb reboot

5. Submit patches

Develop & Debug skill

• Enable compile_commands.json, which let you efficiently trace C/C++ code with VS code installed with clangd extension

export SOONG_GEN_COMPDB=1
export SOONG_GEN_COMPDB_DEBUG=1

• Get read/write permission

adb root
adb remount

• Get/Set Bluetooth properties

adb shell getprop bluetooth.profile.bap.unicast.client.enabled
adb shell setprop bluetooth.profile.bap.unicast.client.enabled true

• logcat

adb logcat -c
adb logcat > "Phone_log_$(date +"%F_%T").log"

• Bluetooth HCI log