Android Application Accessing Hardware Resources: Difference between revisions

Latest revision as of 21:52, 19 September 2023

Warning: This page is designed to be used with a 'release' URL parameter.

This page is using the default release RELEASE_O8.1.0_1.3.0_8M_DART-MX8M.
To view this page for a specific Variscite SoM and software release, please follow these steps:

Visit variwiki.com
Select your SoM
Select the software release

DART-MX8M Android Oreo Accessing Hardware via Android Application

Android Application Access

By default Android Application can't access the hardware directly as per design.
All the hardware access either have to be via Android services or via the HAL layers.

There are multiple ways to access the hardware like GPIOs / UART/ SPI / I2C/CAN
However, if you still want to access you can do so by making Selinux in permissive mode or modifying the

SELinux policies
make your application system app.

See: https://devarea.com/aosp-creating-a-systemapplication/#.XxaL2ShKiUk

Select the interface you are trying to access via Application and clone projects in the Android Studio.

UART

The project you can take as a reference: https://github.com/chzhong/serial-android

SPI

The project you can take as a reference: https://github.com/rrandyzh/android-jni-spi

GPIO

The project you can take as a reference: https://github.com/synportack24/GPIO

I2C

The project you can take as a reference: https://github.com/synportack24/GPIO/blob/master/app/src/main/jni/i2c_fragment.c

CAN

The project you can take as a reference: https://github.com/entropia/libsocket-can-java
Please refer to README.md for making an application.

Tips/Questions/More Details

You can either use the setenforce 0 or have your own sepolicies written, for that refer to SeLinux
For more questions/details register a ticket to our online portal

at Variscite Customer Portal to get high-quality specific details or engineering support for Variscite products

@@ Line 6: / Line 6: @@
 ==Android Application Access==
-By default Android Application can't access the hardware directly as per design.
+By default Android Application can't access the hardware directly as per design. <br>
-All the hardware access either have to be via Android services or via the HAL layers.
+All the hardware access either have to be via Android services or via the HAL layers. <br>
-However there are ways to access the hardware like  GPIOs / UART/ SPI / I2C/CAN
+There are multiple ways to access the hardware like  GPIOs / UART/ SPI / I2C/CAN <br>
-However if customer still want to access you can do so by making Selinux in permissive mode or modify the
+However, if you still want to access you can do so by making Selinux in permissive mode or modifying the
-selinux policies
-a) and make your application system app.
+* SELinux policies
+* make your application system app.
+See:
 https://devarea.com/aosp-creating-a-systemapplication/#.XxaL2ShKiUk
+Select the interface you are trying to access via Application and clone projects in the Android Studio. <br>
 ====UART====
-Project you can take as reference:
+The project you can take as a reference:
 https://github.com/chzhong/serial-android
 ====SPI====
-Project you can take as reference:
+The project you can take as a reference:
 https://github.com/rrandyzh/android-jni-spi
 ====GPIO====
-Project you can take as reference:
+The project you can take as a reference:
 https://github.com/synportack24/GPIO
 ====I2C====
+The project you can take as a reference:
 https://github.com/synportack24/GPIO/blob/master/app/src/main/jni/i2c_fragment.c
 ====CAN====
+The project you can take as a reference:
 https://github.com/entropia/libsocket-can-java <br>
 Please refer to README.md for making an application. <br>
-You can either use the setenforce 0 or have your own sepolicies written, for that refer to  {{Varlink|Android Customizing SePolicy|{{#var:RELEASE_LINK}}|SeLinux}}
+==Tips/Questions/More Details==
+* You can either use the setenforce 0 or have your own sepolicies written, for that refer to  {{Varlink|Android Customizing SePolicy|{{#var:RELEASE_LINK}}|SeLinux}}
+* For more questions/details register a ticket to our online portal <br>
+at [http://www.variscite.com/support/variscite-customer-portal '''Variscite Customer Portal'''] to get high-quality specific details or engineering support for Variscite products