From e2ee1b2a2d74034baab3e8aeacd0afd70c7cfb94 Mon Sep 17 00:00:00 2001
From: "GukSang.Jin" <guksang_chen@163.com>
Date: Fri, 22 May 2026 15:15:48 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0?=
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---
 .../SmokeDensitySettingsViewModel.cs          | 68 ++++++++++++++++++-
 1 file changed, 65 insertions(+), 3 deletions(-)

diff --git a/ConeCalorimeter/ViewModels/SmokeDensitySettingsViewModel.cs b/ConeCalorimeter/ViewModels/SmokeDensitySettingsViewModel.cs
index 2b5de72..9be537a 100644
--- a/ConeCalorimeter/ViewModels/SmokeDensitySettingsViewModel.cs
+++ b/ConeCalorimeter/ViewModels/SmokeDensitySettingsViewModel.cs
@@ -11,10 +11,14 @@ namespace ConeCalorimeter.ViewModels;
 public sealed class SmokeDensitySettingsViewModel : PageViewModel
 {
     private const ushort AbsorbanceRegister = 120;
+    private const double AbsorbanceMinimum = 0;
+    private const double AbsorbanceMaximum = 100;
 
     private readonly Action _closeAction;
     private readonly ITcpDeviceConnectionService _tcpDeviceConnectionService;
     private readonly DispatcherTimer _refreshTimer;
+    private readonly HashSet<ushort> _loggedFloatDiagnostics = [];
+    private readonly HashSet<ushort> _loggedInvalidFloatDiagnostics = [];
     private string _absorbanceText = "";
     private string _lastCalibration = "待校准";
 
@@ -86,9 +90,67 @@ public sealed class SmokeDensitySettingsViewModel : PageViewModel
 
     private void RefreshDeviceValues()
     {
-        AbsorbanceText = _tcpDeviceConnectionService.TryReadFloat(AbsorbanceRegister, out var value)
-            ? value.ToString("0.00", CultureInfo.InvariantCulture)
-            : string.Empty;
+        AbsorbanceText = ReadRangedFloatText(
+            "Absorbance",
+            AbsorbanceRegister,
+            AbsorbanceMinimum,
+            AbsorbanceMaximum,
+            "0.00");
+    }
+
+    private string ReadRangedFloatText(
+        string label,
+        ushort registerAddress,
+        double minimum,
+        double maximum,
+        string format)
+    {
+        if (!_tcpDeviceConnectionService.TryReadFloatValues(registerAddress, out var result))
+        {
+            return string.Empty;
+        }
+
+        if (!ModbusFloatSelector.TrySelectRangedFloat(result, minimum, maximum, out var byteOrder, out var value, out var matchCount))
+        {
+            LogFloatDiagnostic(label, registerAddress, result, null, matchCount);
+            return string.Empty;
+        }
+
+        LogFloatDiagnostic(label, registerAddress, result, byteOrder, matchCount);
+        return NormalizeDisplayValue(value).ToString(format, CultureInfo.InvariantCulture);
+    }
+
+    private void LogFloatDiagnostic(
+        string label,
+        ushort registerAddress,
+        ModbusFloatReadResult result,
+        ModbusFloatByteOrder? selectedByteOrder,
+        int matchCount)
+    {
+        if (selectedByteOrder is null)
+        {
+            if (!_loggedInvalidFloatDiagnostics.Add(registerAddress))
+            {
+                return;
+            }
+        }
+        else if (!_loggedFloatDiagnostics.Add(registerAddress))
+        {
+            return;
+        }
+
+        var selectedText = selectedByteOrder?.ToString() ?? "none";
+
+        Debug.WriteLine(
+            $"Smoke density float {label} register {registerAddress} raw [{result.RawHex}], "
+            + $"ABCD={result.Abcd:G9}, CDAB={result.Cdab:G9}, "
+            + $"BADC={result.Badc:G9}, DCBA={result.Dcba:G9}, "
+            + $"selected={selectedText}, matches={matchCount}.");
+    }
+
+    private static double NormalizeDisplayValue(double value)
+    {
+        return Math.Abs(value) < 0.005 ? 0 : value;
     }
 
     private static bool TryGetCalibrationCoil(string label, out ushort coilAddress)