unity硬件接入（二）---Inputsystem

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该文介绍如何在Unity2021.3.16f1c1版本中使用InputSystem管理设备，特别是针对PID为0x17EF和VID为0x6018（如SonyWirelesscontroller）的HID设备进行注册和数据接收。通过声明硬件设备布局、配置控制面板和解析输入报告来实现硬件交互，包括轴数据读取和按钮状态判定。

安装环境

unity：2021.3.16f1c1
InputSystem

使用说明

设备管理器-人体学输入设备-选择你的控制器
打开事件管理，复制出设备的UID和PID

脚本配置

声明硬件设备
配置VID，PID指向数据接收方

 InputSystem.RegisterLayout<CarJoyInput>(
            matches: new InputDeviceMatcher()
                .WithInterface("HID")
                  .WithCapability("vendorId", 0x17EF) // Sony Entertainment.
        .WithCapability("productId", 0x6018)); // Wireless controller.

配置面板布局以及接收数据解析方案

[InputControlLayout(stateType = typeof(JoyInputTest))]

硬件注册脚本总体脚本

using UnityEditor;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.Controls;
using UnityEngine.InputSystem.DualShock;
using UnityEngine.InputSystem.Layouts;
[InputControlLayout(stateType = typeof(JoyInputTest))]
#if UNITY_EDITOR
[InitializeOnLoad] // Make sure static constructor is called during startup.
#endif
public class  CarJoyInput : InputDevice
{
    static CarJoyInput()
    {
     InputSystem.RegisterLayout<CarJoyInput>(
            matches: new InputDeviceMatcher()
                .WithInterface("HID")
                  .WithCapability("vendorId", 0x17EF) // Sony Entertainment.
        .WithCapability("productId", 0x6018)); // Wireless controller.
    }
  
   [RuntimeInitializeOnLoadMethod]
    public static void Init()
    {

    }
     protected override void FinishSetup()
    {
        base.FinishSetup();
        Oil = GetChildControl<AxisControl>("Oil");
     }
 }

硬件布局以及硬件解析方案配置

using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.InputSystem.Layouts;
using UnityEngine.InputSystem.LowLevel;
using UnityEngine.InputSystem.Utilities;

[StructLayout(LayoutKind.Explicit, Size = 3)]
struct CarJoyInputReport : IInputStateTypeInfo
{
    public FourCC format => new FourCC('H', 'I', 'D');
    [InputControl(name = "Ignite", displayName = "点火器", offset = 1, bit = 4, sizeInBits = 1, layout = "Button", format = "BIT")]
    [FieldOffset(0)] public byte reportId;

}