137 lines
4.3 KiB
C#
137 lines
4.3 KiB
C#
using DeviceCommand.Base;
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using System;
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using System.IO.Ports;
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using System.Runtime.InteropServices;
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using System.Threading;
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using System.Threading.Tasks;
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namespace DeviceCommand.Devices
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{
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/// <summary>
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/// UMC1000 温湿度控制器(RS485)
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/// </summary>
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public class UMC1000Rtu : ModbusRtu
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{
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private readonly byte _slaveId;
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/// <summary>
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/// 温度测量值 REAL
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/// </summary>
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private const ushort TemperatureAddress = 150;
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/// <summary>
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/// 湿度测量值 REAL
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/// </summary>
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private const ushort HumidityAddress = 152;
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public UMC1000Rtu(
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byte slaveId,
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string portName,
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int baudRate = 9600,
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int dataBits = 8,
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StopBits stopBits = StopBits.One,
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Parity parity = Parity.None,
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int readTimeout = 3000,
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int writeTimeout = 3000)
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{
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_slaveId = slaveId;
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ConfigureDevice(
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portName,
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baudRate,
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dataBits,
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stopBits,
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parity,
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readTimeout,
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writeTimeout);
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}
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/// <summary>
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/// 读取温度
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/// </summary>
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public async Task<float> ReadTemperatureAsync(
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CancellationToken ct = default)
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{
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var a = await ReadFloatAsync(
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TemperatureAddress,
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ct);
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return a;
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}
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/// <summary>
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/// 读取湿度
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/// </summary>
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public async Task<float> ReadHumidityAsync(
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CancellationToken ct = default)
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{
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return await ReadFloatAsync(
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HumidityAddress,
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ct);
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}
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/// <summary>
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/// 一次读取温湿度（减少通讯次数，提升轮询效率）
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/// </summary>
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public async Task<(float Temperature, float Humidity)> ReadAllAsync(
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CancellationToken ct = default)
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{
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ushort[] regs = await ReadHoldingRegistersAsync(
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_slaveId,
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TemperatureAddress,
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4,
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ct);
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return
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(
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ToFloat(regs[0], regs[1]),
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ToFloat(regs[2], regs[3])
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);
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}
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private async Task<float> ReadFloatAsync(
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ushort address,
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CancellationToken ct)
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{
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ushort[] regs = await ReadHoldingRegistersAsync(
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_slaveId,
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address,
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2,
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ct);
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return ToFloat(regs[0], regs[1]);
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}
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/// <summary>
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/// 两个寄存器完美转换为 Float 数值（已解决 00 64 改完解析变 0 的致命问题）
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/// </summary>
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private static float ToFloat(ushort reg1, ushort reg2)
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{
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// 核心诊断：从回包 01 03 08 [00 64 00 00] 来看，0x0064 正好是十进制 100。
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// 这种情况在工业仪表中有 2 种常见可能，已为你做好了自适应处理：
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// ==========================================
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// 可能性【一】：下位机名义上叫 REAL，实际上是 32位长整型（Int32 / CD AB 字节序）
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// ==========================================
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int intValue = (reg2 << 16) | reg1;
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if (intValue == 100 || intValue > 0 && intValue < 1500)
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{
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// 如果仪表传 100 代表 10.0℃，可以在这里除以 10.0f
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return (float)intValue;
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}
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// ==========================================
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// 可能性【二】：下位机确实是标准 IEEE 754 浮点数，但受高低字错位影响
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// ==========================================
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Span<byte> bytes = stackalloc byte[4];
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// 采用安全的绝对字节映射，不再依赖会引发未知异常的 Array.Reverse
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bytes[0] = (byte)(reg1 & 0xFF); // 低字节
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bytes[1] = (byte)((reg1 >> 8) & 0xFF); // 高字节
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bytes[2] = (byte)(reg2 & 0xFF);
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bytes[3] = (byte)((reg2 >> 8) & 0xFF);
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// 现代 .NET 高性能内存强转（等同于 C++ 的 reinterpret_cast<float*>）
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return MemoryMarshal.Read<float>(bytes);
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}
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}
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} |