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| [[Android Hardware Access/zh|查看中文]] | | [[Android Hardware Access/zh|查看中文]] |
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− | | + | The Document has moved to: [[FriendlyThings]] |
− | ==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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− | * Android 2.3: Mini6410, Tiny6410
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− | * Android 4.2: Mini210S, Smart210 with SDK, Tiny210 with SDK, Tiny4412 with SDK
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− | * Android 4.4: NanoPi M2, NanoPi S2, NanoPC-T2, Smart4418 with SDK
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− | * Android 5: NanoPi M3, NanoPi-T3, Tiny4412 with SDK
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− | <br />
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− | ==硬件示例程序集合==
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− | * github地址:https://github.com/friendlyarm/AndroidHardwareAccess
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− | ==Andorid示例源代码编译与部署(以SerialPortDemo进行说明) ==
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− | ===1) eclipse导入源代码,以SerialPortDemo为例===
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− | 然后打开eclipse,在eclipse菜单File上选择Import导入项目,选择Existing Android Code Into Workspace,<br />
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− | 我们把项目名称改为 SerialPortDemo:<br />
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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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− | ===2) 编辑源代码,根据需要更改串口设备文件名称===
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− | DEMO要访问的串口设备写死在以下源代码文件的:src/com/friendlyarm/SerialPortDemo/SerialPortDataProcessView.java<br />
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− | 你需要根据实际情况更改:<br />
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− | [[File:AndroidHW03.png|500px]]<br />
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− | ====各个平台开发板的串口设备名称 ====
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− | * Allwinner H3/H5平台开发板 (NanoPi M1/NanoPi M1 Plus等)
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− | UART1-> /dev/ttyS1<br />
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− | UART2 -> /dev/ttyS2<br />
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− | UART3 -> /dev/ttyS3 (仅NanoPi M1, NanoPi K1, NanoPi K1 Plus可用)<br />
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− | * S5P4418平台开发板 (NanoPi Fire2A/NanoPi M2A/NanoPi S2/NanoPC-T2等)
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− | UART1 -> /dev/ttyAMA1 [注1]<br />
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− | UART2 -> /dev/ttyAMA2 [注1]<br />
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− | UART3 -> /dev/ttyAMA3<br />
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− | UART4 -> /dev/ttyAMA4<br />
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− | * S5P6818平台开发板 (NanoPi M3/NanoPC-T3等)
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− | UART1 -> /dev/ttySAC1 [注1]<br />
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− | UART2 -> /dev/ttySAC2 [注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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− | 注1: 仅部分板子可用,具体请查看原理图.
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− | ===3) 编译DEMO源代码,并导出apk文件===
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− | 在Package Explorer上点击项目名称,保证其处于选中状态:<br />
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− | [[File:AndroidHW04.png|500px]]<br />
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− | 在eclipse菜单File上选择Export...:<br />
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− | [[File:AndroidHW05.png|500px]]<br />
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− | 选择Export Android Application:<br />
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− | [[File:AndroidHW06.png|500px]]<br />
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− | 选择项目SerialPortDemo:<br />
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− | [[File:AndroidHW07.png|500px]]<br />
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− | 这一步,Eclipse要求我们创建或选择自已的签名,这里我们选择Create new keystore, 填写key生成后保存的路径和密码,然后点next:<br />
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− | [[File:AndroidHW08.png|500px]]<br />
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− | 继续参考下图完善签名信息,然后点next:<br />
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− | [[File:AndroidHW09.png|500px]]<br />
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− | 接着选择APK文件的保存位置,这里我们选择保存到 signapk-files子目录下,以方便我们稍后要进行的签名操作:<br />
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− | [[File:AndroidHW10.png|500px]]<br />
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− | 点Finish完成APK的导出:<br />
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− | [[File:AndroidHW11.png|500px]]
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− | ===4) 使用系统证书对APK进行重新签名===
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− | 因为访问硬件需要APK有system权限,所以需要使用系统证对APK进行重新签名,<br />
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− | 在命令行下进入signapk-files子目录,然后执行以下命令签名即可:
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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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− | 其中,signapk.jar以及签名文件platform.x509.pem和platform.pk8可在开发板资源下载目录的android-platform-key-files目录下找到。
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− | ===5) 运行与调试===
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− | 5.1) 安装APK,用microUSB线将电脑与开发板连接,用adb命令安装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) 调试:
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− | 运行 SerialPortDemo后,在adb shell命令行模式下执行:
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− | <syntaxhighlight lang="bash">
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− | ps -Z
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− | </syntaxhighlight>
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− | 然后找到com.friendlyarm.SerialPortDemo这个进程,如果前面的权限是如下所示,表明程序已经获得了 system 权限:
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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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− | 以上是Android4的,如果是Android5,则略有不同,不过都表示已经是 system 权限:
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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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− | 如果程序没有获得 system 权限,则打开串口设备会失败。
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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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