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

The targeted audience is STM32MP15 customers or partners.

2. Delivery scope and purpose

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

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

This software delivery is compatible with the following boards:

• STM32MP157x-EV1 Evaluation board. For more information on this board family, please read the article STM32MP157C-EV1 - hardware description

5. Delivered features

5.1. Main software components

• 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

5.2.1. BSP features

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

• Linux Kernel
• U-Boot secondary bootloader
• TF-A primary bootloader
• OP-TEE trusted environment

5.2.2. Android features

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

6. Recommendations for use

6.1. Safe use

• 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

• None

7. Main restrictions

7.1. BSP restrictions

• 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

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

STMicroelectronics can deliver corrections on purpose through github^® components.

9. How to get started with st-android-10.0.0-2020-02-21

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

10. Associated tools

Refer to the Referenced tools release notes .

11. Demonstration applications

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

11.1. STLauncher

Simple launcher application example.

11.2. STCopro M4Echo application

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

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

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

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

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

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

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

13.1. Detailed description of STMicroelectronics modules

13.1.1. BSP modules

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

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

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

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

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

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)

Flash memory shortened to gain space in titles, tables and block diagrams

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

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)

Flash memory shortened to gain space in titles, tables and block diagrams

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

ST in-circuit debugger and programmer for the STM8 and STM32 microcontroller families (See ST-LINK for more details)

MultimediaCard

Flash memories combine high density and cost effectiveness of EPROMs with the electrical erasability of EEPROMs. For this reason, the Flash memory market is one of the most exciting areas of the semiconductor industry today and new applications requiring in system reprogramming, such as cellular telephones, automotive engine management systems, hard disk drives, PC BIOS software for Plug & Play, digital TV, set top boxes, fax and other modems, PC cards and multimedia CD-ROMs, offer the prospect of very high volume demand.

Secure digital