unity 控制安卓开发板IO口

Unity是一款跨平台的游戏引擎，主要用于游戏开发。如果需要控制安卓开发板的IO口，可以通过Unity中的AndroidPlugin来实现。

首先，在Unity中创建一个Android Plugin，可以使用Android Studio或Eclipse等工具来创建一个Android项目，然后在项目中添加需要使用的IO口控制代码，并将其打包成一个jar包。

然后，在Unity中将jar包导入到Assets/Plugins/Android目录下，然后创建一个C#脚本，使用AndroidJavaClass类来调用Android Plugin中的方法。

例如，如果需要控制GPIO口实现LED灯的亮灭，可以在Android Plugin中添加以下代码：

public class GPIOControl {
    private static final String TAG = "GPIOControl";
    private static final String LED_PIN = "/sys/class/gpio/gpio26/value";
    private static final String EXPORT_PIN = "echo 26 > /sys/class/gpio/export";
    private static final String UNEXPORT_PIN = "echo 26 > /sys/class/gpio/unexport";

    public static void openLED() {
        try {
            Runtime.getRuntime().exec(EXPORT_PIN);
            FileWriter fw = new FileWriter(LED_PIN);
            fw.write("1");
            fw.close();
        } catch (IOException e) {
            Log.e(TAG, "Error opening LED: " + e.getMessage());
        }
    }

    public static void closeLED() {
        try {
            FileWriter fw = new FileWriter(LED_PIN);
            fw.write("0");
            fw.close();
            Runtime.getRuntime().exec(UNEXPORT_PIN);
        } catch (IOException e) {
            Log.e(TAG, "Error closing LED: " + e.getMessage());
        }
    }
}

然后在Unity中创建一个C#脚本，使用AndroidJavaClass类来调用openLED()和closeLED()方法来控制LED灯的亮灭：

using UnityEngine;
using System.Collections;

public class GPIOController : MonoBehaviour {

    AndroidJavaClass pluginClass;
    
    void Start () {
        pluginClass = new AndroidJavaClass("com.example.androidplugin.GPIOControl");
    }
    
    public void OpenLED() {
        pluginClass.CallStatic("openLED");
    }
    
    public void CloseLED() {
        pluginClass.CallStatic("closeLED");
    }
}

在Unity中添加一个按钮，将OpenLED()方法和CloseLED()方法分别绑定到按钮的OnClick事件上，即可通过点击按钮来控制LED灯的亮灭。

需要注意的是，使用Android Plugin来控制安卓开发板的IO口需要在AndroidManifest.xml文件中添加相应的权限。例如，控制GPIO口需要添加以下权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

<uses-permission android:name="android.permission.REBOOT" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.DEVICE_POWER" />
<uses-permission android:name="android.permission.ACCESS_SUPERUSER" />

<uses-permission android:name="android.permission.WRITE_SETTINGS" />
<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" />

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />

<uses-permission android:name="android.permission.READ_CALL_LOG" />
<uses-permission android:name="android.permission.WRITE_CALL_LOG" />

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" />
<uses-permission android:name="android.permission.READ_SYNC_SETTINGS" />
<uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" />
<uses-permission android:name="android.permission.MANAGE_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />

<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
<uses-permission android:name="android.permission.LOCATION_HARDWARE" />

<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.RECEIVE_MMS" />
<uses-permission android:name="android.permission.RECEIVE_WAP_PUSH" />

这里需要注意的是，上述权限列表并不是必须要全部添加，具体需要添加哪些权限要根据具体的应用场景来决定。