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C#有人IO模块USR-IO808的完整指南

news 2025/9/8 6:40:43

C#有人IO模块USR-IO808的完整指南

概述

有人USR-IO808是一款8通道数字输入输出模块，支持Modbus RTU协议，通过RS485接口进行通信。本文将介绍如何使用C#语言通过串口操作该模块，实现数字输入(DI)状态的读取和数字输出(DO)的控制。

硬件连接与配置

在开始编程前，请确保：

USR-IO808模块已正确供电
RS485接口与计算机正确连接（通常通过USB转485转换器）
模块的波特率、数据位、停止位和校验位与软件设置一致
模块地址已正确设置（默认为0x11）

核心代码解析

1. 数据包构建类(DataPacketIO808)

public class DataPacketIO808
{// 模块默认地址public const byte AddressDefault = 0x11;// 功能码定义public enum EfunctionNum{read0x02 = 0x02,  // 读取DI状态read0x01 = 0x01,  // 读取DO状态read0x05 = 0x05,  // 控制DO状态}// 控制状态定义public enum EcontrolStatus{open = 0xFF00,   // 开启DOclose = 0x0000,  // 关闭DO}// DI/DO寄存器地址定义public enum EDIDOAddress{DI1 = 0x0020, DI2 = 0x0021, DI3 = 0x0022, DI4 = 0x0023,DI5 = 0x0024, DI6 = 0x0025, DI7 = 0x0026, DI8 = 0x0027,DO1 = 0x0000, DO2 = 0x0001, DO3 = 0x0002, DO4 = 0x0003,DO5 = 0x0004, DO6 = 0x0005, DO7 = 0x0006, DO8 = 0x0007,}// 构建读取DI状态的数据包public static DataPacketIO808 GetDIStatus(byte address){return BuildReadParam(address, EfunctionNum.read0x02, EDIDOAddress.DI1, 8);}// 构建读取DO状态的数据包public static DataPacketIO808 GetDOStatus(byte address){return BuildReadParam(address, EfunctionNum.read0x01, EDIDOAddress.DO1, 8);}// 构建开启DO的数据包public static DataPacketIO808 OpenDO(byte address, ushort DONum){return BuildControlParam(address, EfunctionNum.read0x05, DONum, EcontrolStatus.open);}// 构建关闭DO的数据包public static DataPacketIO808 CloseDO(byte address, ushort DONum){return BuildControlParam(address, EfunctionNum.read0x05, DONum, EcontrolStatus.close);}// 将数据包转换为字节数组public byte[] ToBytes(){lock (Locker){List<byte> bts = new List<byte>{Serialaddress,functionNum,};// 添加地址数据（大端模式）byte[] startArr = BitConverter.GetBytes(startAddress);Array.Reverse(startArr, 0, startArr.Length);bts.AddRange(startArr);// 添加参数数据（大端模式）byte[] controlsta = BitConverter.GetBytes(param);Array.Reverse(controlsta, 0, controlsta.Length);bts.AddRange(controlsta);// 计算并添加CRC校验byte[] checkList = CalcChecksum(bts);bts.AddRange(checkList);return bts.ToArray();}}// CRC校验计算public byte[] CalcChecksum(List<byte> content){UInt16 wCrc = 0xFFFF;for (int i = 0; i < content.Count; i++){wCrc ^= Convert.ToUInt16(content[i]);for (int j = 0; j < 8; j++){if ((wCrc & 0x0001) == 1){wCrc >>= 1;wCrc ^= 0xA001;}else{wCrc >>= 1;}}}byte[] arr = BitConverter.GetBytes((ushort)wCrc);return arr;}
}

2. 数据解析类(DataParseIO808)

public class DataParseIO808
{// 解析返回数据public static bool parseData(byte[] param, byte address, byte funNo){if (param[0] == address && param[1] == funNo){bool crcStatus = CRC_Check(param);if (crcStatus){return true;}}return false;}// CRC校验检查public static bool CRC_Check(byte[] byteData){bool Flag = false;byte[] CRC = new byte[2];UInt16 wCrc = 0xFFFF;for (int i = 0; i < byteData.Length - 2; i++){wCrc ^= Convert.ToUInt16(byteData[i]);for (int j = 0; j < 8; j++){if ((wCrc & 0x0001) == 1){wCrc >>= 1;wCrc ^= 0xA001;}else{wCrc >>= 1;}}}CRC[1] = (byte)((wCrc & 0xFF00) >> 8);CRC[0] = (byte)(wCrc & 0x00FF);if (CRC[1] == byteData[byteData.Length - 1] && CRC[0] == byteData[byteData.Length - 2]){Flag = true;}return Flag;}
}

3. 应用层方法

// 获取所有DI状态
public void GetALLDIStatus(out bool oneStatus, out bool twoStatus, out bool threeStatus, out bool fourStatus, out bool fiveStatus, out bool sixStatus, out bool sevenStatus, out bool eightStatus)
{oneStatus = twoStatus = threeStatus = fourStatus = fiveStatus = sixStatus = sevenStatus = eightStatus = false;try{oneStatus = GetDIStatus(1);twoStatus = GetDIStatus(2);threeStatus = GetDIStatus(3);fourStatus = GetDIStatus(4);fiveStatus = GetDIStatus(5);sixStatus = GetDIStatus(6);sevenStatus = GetDIStatus(7);eightStatus = GetDIStatus(8);}catch (Exception ex){// 异常处理Console.WriteLine("获取DI状态时发生错误: " + ex.Message);}
}// 获取所有DO状态
public void GetALLDOStatus(out bool oneStatus, out bool twoStatus, out bool threeStatus, out bool fourStatus, out bool fiveStatus, out bool sixStatus, out bool sevenStatus, out bool eightStatus)
{oneStatus = twoStatus = threeStatus = fourStatus = fiveStatus = sixStatus = sevenStatus = eightStatus = false;try{oneStatus = GetDOStatus(1);twoStatus = GetDOStatus(2);threeStatus = GetDOStatus(3);fourStatus = GetDOStatus(4);fiveStatus = GetDOStatus(5);sixStatus = GetDOStatus(6);sevenStatus = GetDOStatus(7);eightStatus = GetDOStatus(8);}catch (Exception ex){// 异常处理Console.WriteLine("获取DO状态时发生错误: " + ex.Message);}
}

完整使用示例

// 创建串口对象
SerialPort serialPort = new SerialPort("COM3", 9600, Parity.None, 8, StopBits.One);
serialPort.Open();// 读取所有DI状态
bool di1, di2, di3, di4, di5, di6, di7, di8;
GetALLDIStatus(out di1, out di2, out di3, out di4, out di5, out di6, out di7, out di8);Console.WriteLine("DI状态:");
Console.WriteLine($"DI1: {di1}, DI2: {di2}, DI3: {di3}, DI4: {di4}");
Console.WriteLine($"DI5: {di5}, DI6: {di6}, DI7: {di7}, DI8: {di8}");// 控制DO1开启
DataPacketIO808 openPacket = DataPacketIO808.OpenDO(0x11, 1);
byte[] openData = openPacket.ToBytes();
serialPort.Write(openData, 0, openData.Length);// 等待并读取响应
Thread.Sleep(100);
byte[] response = new byte[serialPort.BytesToRead];
serialPort.Read(response, 0, response.Length);// 验证响应
bool success = DataParseIO808.parseData(response, 0x11, 0x05);
if (success)
{Console.WriteLine("DO1开启成功");
}// 关闭串口
serialPort.Close();