unity 读写ch341 spi

您可以使用Unity的C#脚本来读写CH341芯片的SPI。首先，您需要在Unity中安装CH341的驱动程序，并使用CH341提供的DLL文件来访问芯片。以下是一个简单的示例代码，可以帮助你读写CH341芯片的SPI：

using System;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;

public class CH341SPI : MonoBehaviour
{
    [DllImport("CH341DLL.dll")]
    private static extern int CH341OpenDevice(int iIndex);
    [DllImport("CH341DLL.dll")]
    private static extern int CH341SetStream(int iIndex, int iMode, int iBaud, int iDelay);
    [DllImport("CH341DLL.dll")]
    private static extern int CH341ReadData(int iIndex, byte[] pReadData, int iLength);
    [DllImport("CH341DLL.dll")]
    private static extern int CH341WriteData(int iIndex, byte[] pWriteData, int iLength);

    public string deviceName = "CH341";
    public int deviceIndex = 0;
    public int spiMode = 0;
    public int spiBaudRate = 500000;
    public int spiDelay = 0;

    private int deviceHandle = -1;

    void Start()
    {
        deviceHandle = CH341OpenDevice(deviceIndex);
        if (deviceHandle < 0)
        {
            Debug.LogError(deviceName + " device not found!");
            return;
        }
        int result = CH341SetStream(deviceHandle, spiMode, spiBaudRate, spiDelay);
        if (result < 0)
        {
            Debug.LogError(deviceName + " set stream error: " + result);
        }
    }

    void OnDestroy()
    {
        if (deviceHandle >= 0)
        {
            CH341SetStream(deviceHandle, 0, 0, 0);
            CH341CloseDevice(deviceHandle);
        }
    }

    public byte[] ReadSPI(int length)
    {
        byte[] data = new byte[length];
        int result = CH341ReadData(deviceHandle, data, length);
        if (result < 0)
        {
            Debug.LogError(deviceName + " read error: " + result);
            return null;
        }
        return data;
    }

    public bool WriteSPI(byte[] data)
    {
        int result = CH341WriteData(deviceHandle, data, data.Length);
        if (result < 0)
        {
            Debug.LogError(deviceName + " write error: " + result);
            return false;
        }
        return true;
    }
}

您可以将此脚本组件添加到Unity场景中的GameObject上，然后通过调用`ReadSPI`和`WriteSPI`函数来读写CH341芯片的SPI。请注意，在使用此代码之前，您需要将`CH341DLL.dll`文件放置在Unity项目的Assets文件夹中。