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| | [[Android Hardware Programming for RK3399/zh|查看中文]] | | [[Android Hardware Programming for RK3399/zh|查看中文]] |
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| − | ==Introduction==
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| − | FriendlyElec developed a library called “libfriendlyarm-hardware.so”, for android developer to access the hardware resources on the development board in their android apps, the library is based on Android NDK.<br />
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| − | ==Accessible Interfaces & Ports==
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| − | * Serial Port
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| − | * PWM
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| − | * EEPROM
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| − | * ADC
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| − | * LED
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| − | * LCD 1602 (I2C)
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| − | * OLED (SPI)
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| − | I2C, SPI, GPIO are accessible.<br />
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| − | <br />
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| − | <div><ul>
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| − | <li style="display: inline-block;"> [[File:Smart4418SDK+OLED.png|frameless|350px|Smart4418SDK+OLED]]</li>
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| − | <li style="display: inline-block;"> [[File:NanoPCT3-I2C-LCD1602.jpg|frameless|350px|NanoPCT3-I2C-LCD1602]] </li>
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| − | </ul></div>
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| − | ==Available OS & Boards==
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| − | * NanoPC-T3/NanoPi-M3: Android 5
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| − | * Smart4418 SDK/NanoPC-T2/NanoPi-M2/NanoPi S2: Android 5, Android 4.4
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| − | * Tiny4412: Android 4.2, Android 5
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| − | * Tiny210/Smart210/Mini210: Android 4.2
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| − | * Tiny6410/Mini6410: Android 2.3
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| − |
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| − | ==Code Samples==
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| − | * Here is a github address for code samples: https://github.com/friendlyarm/AndroidHardwareAccess
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| − | ==Compile & Deploy Andorid Code (SerialPortDemo)==
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| − | ===Step 1. Import source code in eclipse (SerialPortDemo)===
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| − | Start eclipse, click on "Import" on its main window's File menu and then select "Existing Android Code Into Workspace" to import your source code<br />
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| − | We name this project as "SerialPortDemo"<br />
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| − |
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| − | <div><ul>
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| − | <li style="display: inline-block;">[[File:AndroidHW01.png|400px]]</li>
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| − | <li style="display: inline-block;">[[File:AndroidHW02.png|400px]] </li>
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| − | </ul></div>
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| − |
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| − | ===Step 2. Edit source code===
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| − | The names of serial devices this DEMO accesses are listed in this file: src/com/friendlyarm/SerialPortDemo/SerialPortDataProcessView.java<br />
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| − | Make changes according to your devices' names:<br />
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| − | [[File:AndroidHW03.png|500px]]<br />
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| − | ====Serial Device Names under Multiple Platforms====
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| − | * Allwinner H3/H5 Based Boards (NanoPi M1/NanoPi M1 Plus etc)
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| − | UART1-> /dev/ttyS1<br />
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| − | UART2 -> /dev/ttyS2<br />
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| − | UART3 -> /dev/ttyS3 (Only applies to NanoPi M1, NanoPi K1 and NanoPi K1 Plus)<br />
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| − | * S5P4418 Based Boards (NanoPi Fire2A/NanoPi M2A/NanoPi S2/NanoPC-T2 etc)
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| − | UART1 -> /dev/ttyAMA1 [Note 1]<br />
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| − | UART2 -> /dev/ttyAMA2 [Note 1]<br />
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| − | UART3 -> /dev/ttyAMA3<br />
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| − | UART4 -> /dev/ttyAMA4<br />
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| − | * S5P6818 Based Boards (NanoPi M3/NanoPC-T3 etc)
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| − | UART1 -> /dev/ttySAC1 [Note 1]<br />
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| − | UART2 -> /dev/ttySAC2 [Note 1]<br />
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| − | UART3 -> /dev/ttySAC3<br />
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| − | UART4 -> /dev/ttySAC4<br />
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| − | <br />
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| − | Note 1: only applies to specific boards, you need to check if a board has that serial device populated.
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| − |
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| − | ===Step 3. Compile DEMO's source code and export apk file===
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| − | On "Package Explorer" check your project's name:<br />
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| − | [[File:AndroidHW04.png|500px]]<br />
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| − | On eclipse's main menu select "File" and then "Export...":<br />
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| − | [[File:AndroidHW05.png|500px]]<br />
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| − | Select "Export Android Application":<br />
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| − | [[File:AndroidHW06.png|500px]]<br />
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| − | Select "SerialPortDemo":<br />
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| − | [[File:AndroidHW07.png|500px]]<br />
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| − | Eclipse requires you to create a new keystore or select an existing keysotre in this step. In this case we selected "Create new keystore", set a path to store the key and created its password and then clicked on "next":<br />
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| − | [[File:AndroidHW08.png|500px]]<br />
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| − | Refer to the following screenshot to fill more information and click on "next":<br />
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| − | [[File:AndroidHW09.png|500px]]<br />
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| − | Select a path to store your APK file. In this case we set it to a "signapk-files" directory:<br />
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| − | [[File:AndroidHW10.png|500px]]<br />
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| − | Click on "Finish" to export an APK file.<br />
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| − | [[File:AndroidHW11.png|500px]]
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| − | ===Step 4. Give APK New Signature===
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| − | For a program to access a hardware device that program needs to have "system" right therefore you need to give your APK a new signature.<br />
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| − | Enter the signapk-files directory and give your APK a new signature:
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| − | <syntaxhighlight lang="bash">
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| − | cd signapk-files/
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| − | java -jar ./signapk.jar platform.x509.pem platform.pk8 ./SerialPortDemo.apk SerialPortDemo-Signed.apk
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| − | </syntaxhighlight>
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| − | The "signapk.jar", "platform.x509.pem" and "platform.pk8" files are available under the "android-platform-key-files" directory.
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| − |
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| − | ===Step 5 Run & Debug===
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| − | 5.1) Install APK. Connect your board to a host PC with a microUSB cable and run adb commands to install your "SerialPortDemo-Signed.apk":
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| − | <syntaxhighlight lang="bash">
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| − | adb install SerialPortDemo-Signed.apk
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| − | </syntaxhighlight>
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| − | 5.2) Debug:
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| − | After SerialPortDemo is started run the following command in "adb shell":
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| − | <syntaxhighlight lang="bash">
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| − | ps -Z
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| − | </syntaxhighlight>
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| − | Check this com.friendlyarm.SerialPortDemo" process. If its right is as follows that means this application already has "system" right:
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| − | <syntaxhighlight lang="bash">
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| − | u:r:system_app:s0 system 1610 112 com.friendlyarm.SerialPortDemo
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| − | </syntaxhighlight>
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| − | This case is for Android 4. If you do it under Android 5 it will be as follows. Although some details are slightly different it means the application has "system" right as well:
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| − | <syntaxhighlight lang="bash">
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| − | u:r:platform_app:s0 u0_a60 1905 138 com.friendlyarm.SerialPortDemo
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| − | </syntaxhighlight>
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| − | If your application doesn't have "system" right it will fail to open a device.
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| − | ==Resources==
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| − | * Code Samples: https://github.com/friendlyarm/AndroidHardwareAccess
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| − | * Guide to API in Chinese: https://github.com/friendlyarm/AndroidHardwareAccess/blob/master/友善电子Android硬件开发指南.pdf
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| − | ==Update Log==
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| − | ===March-2-2017===
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| − | * Released English version
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| − |
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| − | ===Dec-19-2017===
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| − | * Added section 5
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