STM32MP15 distribution for Android release note

This article describes the content of STM32MPU distribution for Android software release v1.1.0 st-android-10.0.0-2020-02-21 (tag), which is part of STM32MP15 ecosystem release note - v1.2.0.

1 Intended audience[edit]

The targeted audience is STM32MP15 customers or partners.

2 Delivery scope and purpose[edit]

The STM32MPU distribution for Android™ provides all the components required for running, developing and/or making your own platform based on Android™ framework. It runs on the Arm® Cortex®-A7 processors, and is a fundamental part of the STM32MPU Embedded Software distribution for Android.

It is compatible with Android 10.0.0.

It is provided as an example. The Android certifications are not guaranteed.


This delivery of STM32MP15 distribution for Android™ v1.1.0 is part of STM32MP15-Ecosystem-v1.2.0 (see the STM32MP15 ecosystem release note - v1.2.0).

3 Licensing[edit]

This software package is licensed under a SOFTWARE LICENSE AGREEMENT (SLA). Customers may not use this package except in compliance with the software license agreement (SLA).

All packages use the same source components. All components and their respective licenses are listed here.

4 Supported hardware[edit]

This software delivery is compatible with the following boards:

5 Delivered features[edit]

5.1 Main software components[edit]

  • Android version v10.0.0 (AOSP android-10.0.0_r22 tag)
  • Kernel version v4.19.94 (AOSP common kernel) + updates for STM32MP1 and associated boards (waiting upstream finalization)
  • TF-A version v2.0 + updates for STM32MP1 and associated boards (waiting upstream finalization)
  • U-Boot version v2018.11 + updates for STM32MP1 and associated boards (waiting upstream finalization)
  • OP-TEE version v3.3.0 + updates for STM32MP1 and associated boards (waiting upstream finalization)
  • STM32CubeMP1 FW v1.2.0
  • GCC version v8.2
  • openOCD version v0.10.0
  • GCnano version v6.2.4

5.2 Detailed features[edit]

5.2.1 BSP features[edit]

The STM32MP15 distribution for Android™ v1.1.0 is based on the OpenSTLinux BSP v1.2.0 described in the following chapters:

5.2.2 Android features[edit]

Domain Feature STM32MP15
Evaluation board 		Comment
Boot Fastboot Yes This mode can be entered by connecting an ST-Link console to the UART interface or by hardware control.
Verified boot No
A/B mechanism No Boot A and B images are available (boot from A is selected by default).
Recovery No
Multimedia Audio speaker Yes Audio speaker output can be used only to connect a headset.
Audio headset Yes Not selected by default (no headset detection)
Audio built-in digital micro Yes Limited to one microphone (mono).
Audio USB No
Camera Yes
Camera USB No
Video SW decode Yes Maximum 480p30 without audio.
Security SELinux Yes
Runtime verification No
Disk encryption Yes
Trusted environment Yes OP-TEE
Keystore No Only software backup is used.
Gatekeeper No
Network and connectivity Ethernet Yes
Wifi Yes TP-LINK dongle (TL-WN722N) is used for test purposes.
Wifi hotspot Yes TP-LINK dongle (TL-WN722N) is used for test purposes.
BT / BLE No
USB Yes Mass storage / MTP / PTP.
Systems Boot control Partially Available but not enabled.
Power control Yes
Thermal control Yes Only one temperature is managed for CPU/GPU (others are stubbed).
Update engine No
Sensors Accelerometer No
Gyroscope No
Magnetometer No
Proximity No
Pressure No
Temperature No
Hub No
Debug ADB (USB) Yes
ADB (Ethernet) Yes
ADEB Yes Only for SELinux trace.
Perfetto Yes
Metrics Yes Boot time.
Storage USB Key Yes
microSD card Yes
eMMC Yes
Others Lights Yes
Touchscreen Yes

6 Recommendations for use[edit]

6.1 Safe use[edit]

  • Flash load and boot from a supported Flash device: SDCard or eMMC Flash memories
  • Develop Android™ applications, libraries and kernel modules
  • Prototype applications based on ST boards
  • Develop your own board based on an STM32MP15x

6.2 Non-recommended use[edit]

  • None

7 Main restrictions[edit]

7.1 BSP restrictions[edit]

  • STM32CubeMX configuration panels propose a few internal peripheral modes that are not supported by the TF-A or OP-TEE drivers running in Arm™ Cortex™-A7 secure context.
  • The following table lists all the known restrictions.
IP Information/Restriction usage in Cortex-A7 secure context
I2C4/I2C6 The proposed SMBus two-wire Interface mode is not supported for Arm Cortex-A7 secure context (TF-A , OP-TEE) as no use case foreseen.
PWR TF-A and OP-TEE implementation do not support wakeup events for secure IPs assigned to Arm Cortex-A7 secure context.
RCC The proposed master clock output1 and 2 as well as Audio clock input modes are not applicable to Arm Cortex-A7 secure context (TF-A, OP-TEE)
SPI6 The SPI software driver is not available in OP-TEE implementation for Arm Cortex-A7 secure context.
TAMP OP-TEE implementation does not support TAMP_IN inputs and TAMP_OUT outputs in Arm Cortex-A7 secure context.
USART1 OP-TEE implementation does not support USART Synchronous mode in Arm Cortex-A7 secure context.

7.2 Android restrictions[edit]

STM32P15 distribution for Android™ is provided as example.

In this context:

  • Compliance tests (VTS/CTS) are not ensured (but they are executed and treated as much as possible).
  • Security HAL (Keystore, Gatekeeper, Oemlock) are not available (removed from manifest) or stubbed.
  • Verified boot and A/B boot mechanism are not available or are partially available.

The following functions are available on STM32MP15 Evaluation board but are not integrated in STM32P15 distribution for Android™:

  • Audio headset detection is not available (its usage has to be forced).
  • Audio RCA is not available (SPDIF input / SPDIF output).
  • Audio digital microphone is limited to mono mode (record usage) without any gain.
  • Joystick is not available.

8 Minor release updates[edit]

STMicroelectronics can deliver corrections on purpose through github® components.

9 How to get started with st-android-10.0.0-2020-02-21[edit]

Refer to How to download the software and start with this release.

10 Associated tools[edit]

Refer to the Referenced tools release notes .

11 Demonstration applications[edit]

The STM32MP15 distribution for Android™ is delivered with several applications provided as example.

11.1 STLauncher[edit]

Simple launcher application example.

11.2 STCopro M4Echo application[edit]

Example of application using the proprietary coprocessor service. It allows a direct interaction with the firmware launched on the embedded Arm® Cortex®M4 core.

The firmware just returns the received character via the open serial port.

The associated application project is available on github® (compatible with Android Studio IDE): STCoproM4Echo application.

11.3 STCopro M4Example application[edit]

Example of application using the proprietary coprocessor service. It allows direct interaction with the firmware started on the embedded Arm® Cortex®M4 core.

The firmware generates a signal on the DAC and gets back a signal from the ADC. A wire can be added to loop back the DAC on the ADC. The firmware also shows a simple usage of several blocks available on Arm® Cortex®M4 side.

The associated application project is available on github® (compatible with Android Studio IDE): STCoproM4Example application.

The associated firmware project is available on github® (compatible with System Workbench IDE): STCoproM4Example firmware.

11.4 STCamera[edit]

Simple camera application (preview) showing a way to manage the built-in camera. It is compatible only with the MB1379 camera extension board. An external storage configured as portable device must be available to allow taking pictures.

11.5 STAudio[edit]

Simple audio application demonstrating how to play and record audio data. The audio files must be stored in the Music directory on an external storage device (such as a USB key) or anywhere on a primary storage (such as an SD card in case of eMMC configuration).

11.6 STVideo[edit]

Simple video application illustrating how to play a video. The video files must be stored in the Movies directory on an external storage (such as a USB key) or anywhere on a primary storage (such as an SD card in case of eMMC configuration).

11.7 STPerf[edit]

Performance overlay application used to demonstrate in foreground the device performance (CPU usage, GPU usage, frame rate). The application can be configured and stopped via a notification system interface.

Limitation: this application is available only in debug build.

12 Main changes compared to v1.0.0[edit]

The main differences between v1.1.0 and previous delivery v1.0.0 (see STM32MP15 distribution for Android release note - v1.0.0):

  • Switch from Android 9.0.0 (android-9.0.0_r49) to Android 10.0.0 (android-10.0.0_r22)
  • Switch from Linux kernel 4.19.49 to 4.19.94
  • Switch from STM32MP1 OpenSTLinux BSP V1.1.0 to V1.2.0
  • Added CPU@800MHz capability

13 Detailed delivery content[edit]

13.1 Detailed description of STMicroelectronics modules[edit]

13.1.1 BSP modules[edit]

Module name Path of module Description
stm32mp1-bootloader device/stm/
stm32mp1-bootloader 		Primary (Trusted Firmware-A) and secondary (Universal bootloader for embedded devices) bootloaders for STM32MP
Name Version License
tf-a-stm32mp1 2.0 BSD-3-Clause
Name Version License
u-boot-stm32mp1 2018.11 GPLv2+
stm32mp1-kernel device/stm/
stm32mp1-kernel 		Linux STM32MP Kernel
Name Version License
linux-stm32mp1 4.19 GPLv2
stm32mp1-tee device/stm/
stm32mp1-tee 		OPTEE OS for STM32MP
Name Version License
optee_os-stm32mp1 3.3.0 BSD-2-Clause & BSD-3-Clause
stm32mp1-openocd device/stm/
stm32mp1-openocd 		Free and open on-chip debugging, in-system programming and boundary-scan testing
Name Version License
stm32mp1-openocd 0.10.0 GPLv2

13.1.2 Common and peripherals modules[edit]

Module name Path of module Description
stm32mp1 device/stm/
stm32mp1 		Configuration of the STM32MP1 distribution for Android
Name Version License
stm32mp1 NA Apache v2.0
allocator device/stm/stm32mp1/
peripheral/allocator 		STMicroelectronics allocator HAL public header files useful for composer
Name Version License
allocator NA Apache v2.0
audio device/stm/stm32mp1/
peripheral/audio 		STMicroelectronics Audio HAL source code
Name Version License
audio NA Apache v2.0
bootctrl device/stm/stm32mp1/
peripheral/bootctrl 		STMicroelectronics Boot Control HAL source code and the dedicated misc partition image generator
Name Version License
bootctrl NA Apache v2.0
camera device/stm/stm32mp1/
peripheral/camera 		STMicroelectronics Camera HAL source code
Name Version License
camera NA Apache v2.0
composer device/stm/stm32mp1/
peripheral/composer 		STMicroelectronics composer HAL source code
Name Version License
composer NA Apache v2.0
copro device/stm/stm32mp1/
peripheral/copro 		STMicroelectronics Copro HAL source code
Name Version License
copro NA Apache v2.0
health device/stm/stm32mp1/
peripheral/health 		STMicroelectronics Health hardware service source code
Name Version License
health NA Apache v2.0
lights device/stm/stm32mp1/
peripheral/lights 		STMicroelectronics Lights HAL source code
Name Version License
lights NA Apache v2.0
memtrack device/stm/stm32mp1/
peripheral/memtrack 		STMicroelectronics Memtrack HAL source code
Name Version License
memtrack NA Apache v2.0
oemlock device/stm/stm32mp1/
peripheral/oemlock 		STMicroelectronics OemLock HAL source code (stub version)
Name Version License
oemlock NA Apache v2.0
thermal device/stm/stm32mp1/
peripheral/thermal 		STMicroelectronics Thermal hardware service source code
Name Version License
thermal NA Apache v2.0
usb device/stm/stm32mp1/
peripheral/usb 		STMicroelectronics Usb hardware service source code
Name Version License
usb NA Apache v2.0
wifi device/stm/stm32mp1/
peripheral/wifi 		STMicroelectronics libwifi HAL source code
Name Version License
wifi NA Apache v2.0

13.1.3 Board modules[edit]

Module name Path of module Description
eval device/stm/stm32mp1/
eval 		STMicroelectronics configuration for Android used to generate images adapted to the STM32MP15 Evaluation boards
Name Version License
eval NA Apache v2.0

13.1.4 Coprocessor service module[edit]

Module name Path of module Description
CoproService packages/apps/
CoproService 		STMicroelectronics coprocessor service
Name Version License
CoproService NA Apache v2.0

13.1.5 ST application modules[edit]

Module name Path of module Description
app vendor/stm/app STMicroelectronics applications that can be associated, if need be, to their respective coprocessor firmware
Name Version License
app NA Apache v2.0


14 Archives Archive box.png[edit]

STM32MP15 release Distribution for Android release note
STM32MP15-Ecosystem-v1.1.0 STM32MP15 distribution for Android release note - v1.0.0


Android Open Source Project

Trusted Firmware for Arm Cortex-A

Das U-Boot -- the Universal Boot Loader (see U-Boot_overview)

Open Portable Trusted Execution Environment

Board support package

spelling for older versions of STLink, ST in-circuit debugger and programmer for the STM8 and STM32 microcontroller families

Universal Asynchronous Receiver/Transmitter

BlueTooth

Bluetooth Low Energy. Bluetooth LE, marketed as Bluetooth Smart is a wireless personal area network technology designed and marketed by the Bluetooth Special Interest Group aimed at novel applications in the healthcare, fitness, beacons, security, and home entertainment industries.

Central processing unit

Graphics Processing Units

Android debug bridge (Android specific)

former spelling for e•MMC ('e' in italic)

System Management Bus

Reset and Clock Control

Serial Peripheral Interface

Tamper

Universal Synchronous/Asynchronous Receiver/Transmitter

Vendor Test Suite (Android specific)

Compatibility Test Suite (Android specific) or Clear to send (in UART context)

Hardware Abstraction Layer

(Software)Integrated development/design/debugging environment

Digital-to-analog converter (Electronic circuit that converts a binary number into a continuously varying value.)

Analog-to-digital converter. The process of converting a sampled analog signal to a digital code that represents the amplitude of the original signal sample.

SD memory card (https://www.sdcard.org)

Operating System

Non Applicable

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