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Android、RPi 2B

RPI: Android 9 Pie on Raspberry Pi 3B & 3B+

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Raspberry Pi 3B+ can also run Android Pie now!

  • Update 2019-04-25 Upload system image and How to video to github.com

Any one can download image from github.com: https://github.com/brobwind/pie-device-brobwind-rpi3-binary

A video about how to flash and extend userdata partition also included.

  • Update 2019-03-03 Update kernel image and upload all source code

Download link: 2019_03_02_rpi3_13fa200.bin.gz

The u-boot, kernel, OpenGL driver has been upload to github.com, you can download code by executing following command:

$ pushd device/brobwind/rpi3 && git pull && popd
$ repo sync -c

Antutu benchmark on Raspberry Pi 3 Model B+:

And Geekbench 4 on Raspbery Pi 3 Model B+:

  • Update 2019-02-17 Antutu benchmark

Today, I try to run Antutu benchmark app to check the RPi 3B & 3B+ performance, then discover the sores are almost the same. There must be something wrong, then I decided to check the CPU frequency from /sys/devices/system/cpu/, but there is not cpufreq related items. The next step is rebuild the bcm2835 cpufreq module and figure out the actual running frequency. Finally it turns out  both RPi 3B & 3B+ CPU frequency at 600MHz x 4。

  • Update 2019-01-26

GUI: OpenGL based on mesa3d and hardware composer based on drm

Audio: support a2dp and on-board audio jack

Knowing issue:

1. Enable `Debug GPU overdraw’ in system settings will make app crash

2. Enable `Debug non-retangular clip operations’ in system settings will make app crash

3. Do not disable `Disable HW overlays’ in system settings

4. Audio over HDMI not support

5. Can not play video

Download link:  2019_01_25_rpi3_a586f2b.bin.gz

  • Feature:

1. Bootloader: u-boot as AndroidThings on RPi 3B v.1.0.4, run on 64-bit mode

2. Kernel: v.4.14.71 run on 64-bit mode

3. Display: 720p(1280×720) @ 60Hz through on board HDMI port

4. Audio:  analog, 2 channel through on board audio jack

5. WiFi: 2.4G (RPi 3B & 3B+), 5G (RPi 3B+)

6. Bluetooth: HCI over UART(ttyAMA0), RPi 3B: 921600bps no flow control; RPi 3B+: 3000000bps with flow control

7. Ethernet: both work, and IP from DHCP

8. OpenGL render:  Skia GL, swiftshader

2018_12_02_launcher3 2018_12_02_settings 2018_12_02_settings_about

  • Knowing issue:

1. External storage (sdcard) no function due to not kernel sdcardfs driver support

2. Bluetooth: Can bind device, ble gatt profile works, pan profile do not work due to not permission to create bt-pan device

3. Network: RPi 3B+: while Ethernet online, WiFi network can not connect; The eth0 device can not auto down while eject the cable

4. Bitmap: The hardware bitmap will miss draw both on Skia GL and OpenGL

5. The device can not go to sleep mode or the Wifi driver will run with error

  • Partition
Disk rpi3b.bin: 8388608 sectors, 4.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 9884F86F-891D-4DD9-B2C8-6277BC24DC26
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 8388574
Partitions will be aligned on 8-sector boundaries
Total free space is 1504957 sectors (734.8 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              40          131111   64.0 MiB    FFFF  rpiboot
   2          131112          133159   1024.0 KiB  FFFF  uboot_a
   3          133160          135207   1024.0 KiB  FFFF  uboot_b
   4          135208          200743   32.0 MiB    FFFF  boot_a
   5          200744          266279   32.0 MiB    FFFF  boot_b
   6          266280         1597479   650.0 MiB   FFFF  system_a
   7         1597480         2928679   650.0 MiB   FFFF  system_b
   8         2928680         2928807   64.0 KiB    FFFF  vbmeta_a
   9         2928808         2928935   64.0 KiB    FFFF  vbmeta_b
  10         2928936         2930983   1024.0 KiB  FFFF  misc
  11         2930984         3455271   256.0 MiB   FFFF  vendor_a
  12         3455272         3979559   256.0 MiB   FFFF  vendor_b
  13         3979560         3987751   4.0 MiB     FFFF  oem_bootloader_a
  14         3987752         3995943   4.0 MiB     FFFF  oem_bootloader_b
  15         3995944         4000039   2.0 MiB     FFFF  frp
  16         4000040         4786471   384.0 MiB   FFFF  swap
  17         4786472         6883623   1024.0 MiB  FFFF  userdata
  • Source code

Source(partial) has been uploaded to github: https://github.com/brobwind/pie-device-brobwind-rpi3

You can build your own OS now.

  • Download

1. 2018_12_02_rpi3b_4117784.zip

2. 2019_01_25_rpi3_a586f2b.bin.gz (With hardware acceleration)

3. 2019_03_02_rpi3_13fa200.bin.gz (With hardware acceleration CPU @ 1.4GHz for Raspbery Pi 3 Model B+)

  • Flash image
$ sudo dd if=rpi3b_4117784.img of=/dev/to/flash bs=4MiB

 

Under the hood