Unity3d使用SerialPortUtilityPro读取串口数据

Unity3d2021.3.35f1，Serial Port Utility Pro v2.6

一、测试串口接收基本功能

1.新建工程，导入Serial Port Utility Pro v2.6.unitypackage

提示 error CS0619: 'AndroidSdkVersions.AndroidApiLevel21' is obsolete: 'Minimum supported Android API level is 22 (Android 5.1 Lollipop). Please use AndroidApiLevel22 or higher'

解决方法将21改为22

2.打开ExampleDeviceList场景

3.修改DeviceListProgram波特率为115200，编辑代码SPUPDeviceList.cs

（1）将按钮名改为串口名

（2）接收0x00时不要丢弃，处理16进制时有用，

4.切换到SerialPortUtilityPro.cs,去掉ReadUpdate函数中的调试输出代码

5.添加byte数组以16进制字符串显示函数

        /// <summary>/// byte[]转16进制格式string/// </summary>/// <param name="bytes"></param>/// <returns></returns>public static string ToHexString(byte[] bytes){string returnStr = "";if (bytes != null){for (int i = 0; i < bytes.Length; i++){ returnStr += bytes[i].ToString("X2") + " ";}}return returnStr;}

6.输入16进制字符串

                string debugString = ToHexString(dataBuffer.ToArray());Debug.Log(debugString);SerialDebugAddString(debugString, false);

注意：程序UI字符串太长的话会被截断，输出到Unity控制台不会被截断。

二、在下拉列表中打开串口

1.修改SPUPDeviceList.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using System;
using System.Linq;public class SPUPDeviceList : MonoBehaviour
{//SPUPList<SerialPortUtility.SerialPortUtilityPro> spList = new List<SerialPortUtility.SerialPortUtilityPro>();public int baudrate = 115200;public SerialPortUtility.SerialPortUtilityPro.OpenSystem openMode = SerialPortUtility.SerialPortUtilityPro.OpenSystem.USB;public PositioningManager positioningManager;public Dropdown dropdownDevices;public Button btnOpen;public Text textPrompt;private Dictionary<string, SerialPortUtility.SerialPortUtilityPro.DeviceInfo> dictIndex2Dev = new Dictionary<string, SerialPortUtility.SerialPortUtilityPro.DeviceInfo>();void Awake(){SerialPortUtility.SerialPortUtilityPro.DeviceInfo[] devicelist = SerialPortUtility.SerialPortUtilityPro.GetConnectedDeviceList(openMode);if (devicelist == null)return;foreach (SerialPortUtility.SerialPortUtilityPro.DeviceInfo d in devicelist){//serialPort = new SerialPortUtility.SerialPortUtilityPro(); //do not useString GameObjectName = "NONE";if (openMode == SerialPortUtility.SerialPortUtilityPro.OpenSystem.USB)GameObjectName = d.PortName;else if (openMode == SerialPortUtility.SerialPortUtilityPro.OpenSystem.BluetoothSSP)GameObjectName = d.SerialNumber;else if (openMode == SerialPortUtility.SerialPortUtilityPro.OpenSystem.PCI)GameObjectName = d.Vendor;dictIndex2Dev.Add(GameObjectName, d);}dropdownDevices.AddOptions(dictIndex2Dev.Keys.ToList());}private void Start(){btnOpen.onClick.AddListener(Open);}void Open(){string key = dropdownDevices.options[dropdownDevices.value].text;if(dictIndex2Dev.ContainsKey(key)){SerialPortUtility.SerialPortUtilityPro.DeviceInfo d = dictIndex2Dev[key];OpenSerialPort(d, key);}}private void OpenSerialPort(SerialPortUtility.SerialPortUtilityPro.DeviceInfo d, string GameObjectName){GameObject obj = new GameObject(GameObjectName);SerialPortUtility.SerialPortUtilityPro serialPort = obj.AddComponent<SerialPortUtility.SerialPortUtilityPro>();//configserialPort.SetDebugConsoleMonitorView(false);serialPort.OpenMethod = openMode;serialPort.VendorID = d.Vendor;serialPort.ProductID = d.Product;serialPort.SerialNumber = d.SerialNumber;serialPort.BaudRate = baudrate;   //115200kbpsserialPort.ReadProtocol = SerialPortUtility.SerialPortUtilityPro.MethodSystem.Streaming;serialPort.RecvDiscardNull = false;serialPort.IsAutoOpen = true;serialPort.OnReceveDistanceMsgHand += OnReceveDistanceMsg;spList.Add(serialPort);StartCoroutine(delayGetOpenResult(serialPort));}IEnumerator delayGetOpenResult(SerialPortUtility.SerialPortUtilityPro serialPort){yield return new WaitForSeconds(0.2f);bool suc = serialPort.IsOpened();textPrompt.text = suc ? "打开成功" : "打开失败";}void OnReceveDistanceMsg(uint dis1, uint dis2, uint dis3){positioningManager.UpdateDistance(dis1, dis2, dis3);}void OnDestory(){foreach (SerialPortUtility.SerialPortUtilityPro item in spList){item.Close();}}// Update is called once per framevoid Update (){if (Input.GetKey(KeyCode.Home) || Input.GetKey(KeyCode.Escape) || Input.GetKey(KeyCode.Menu)){Application.runInBackground = false;Application.Quit();return;}}//for public void ReadComprateString(object data){var text = data as string;Debug.Log(text);}
}