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							<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>RT Table NTC</title>
    <link rel="stylesheet" href="./styles.css">
</head>

<body>
    <header>
        <h1>RT Table Generator</h1>
        <ul class="nav-tabs">
            <li><a href="./RT_Table_NTC.html" class="active">NTC</a></li>
            <li><a href="./RT_Table_PT100.html">PT100</a></li>
            <li><a href="./RT_Table_PT1000.html">PT1000</a></li>
            <li><a href="./VT_Table_TJ.html">Thermocouple</a></li>
            <li><a href="./RT_Table_Import.html">Import Data</a></li>
        </ul>
    </header>

    <div class="container">
        <section>
            <h2 class="section-title">NTC Thermistor RT Table Generator</h2>

            <!-- 计算公式展示 -->
            <div class="formula">
                <p>The Steinhart-Hart Equation:</p>
                <div class="highlight">
                    1/T = A + B × ln(R) + C × [ln(R)]³
                </div>
                <p>Where:</p>
                <ul style="text-align: left; margin: 10px auto; display: inline-block;">
                    <li>T = Temperature in Kelvin</li>
                    <li>R = Thermistor resistance at temperature T (Ω)</li>
                    <li>A, B, C = Steinhart-Hart coefficients</li>
                </ul>
                <p>For simplified B-parameter equation:</p>
                <div class="highlight">
                    R = R₀ × exp[B × (1/T - 1/T₀)]
                </div>
                <p>Where:</p>
                <ul style="text-align: left; margin: 10px auto; display: inline-block;">
                    <li>R₀ = Resistance at reference temperature T₀ (e.g., 10,000 Ω at 25°C)</li>
                    <li>B = B-value constant (e.g., 3950)</li>
                    <li>T = Temperature in Kelvin (K)</li>
                    <li>T₀ = Reference temperature in Kelvin (298.15 K for 25°C)</li>
                </ul>
            </div>
        </section>

        <section>
            <h2 class="section-title">Parameters</h2>
            <!-- 参数设置 -->
            <div>
                <table class="params-table">
                    <tr>
                        <td>
                            <label for="param_T_min">Temperature Min (°C):</label>
                        </td>
                        <td>
                            <input type="number" id="param_T_min" name="param_T_min" value="-40" class="tableInput">
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <label for="param_T_max">Temperature Max (°C):</label>
                        </td>
                        <td>
                            <input type="number" id="param_T_max" name="param_T_max" value="125" class="tableInput">
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <label for="param_step">Temperature Step (°C):</label>
                        </td>
                        <td>
                            <input type="number" id="param_step" name="param_step" value="1" class="tableInput">
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <label for="param_B">B Value (25-50°C):</label>
                        </td>
                        <td>
                            <input type="number" id="param_B" name="param_B" value="3950" class="tableInput">
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <label for="param_R0">R₀ Value (Ω):</label>
                        </td>
                        <td>
                            <input type="number" id="param_R0" name="param_R0" value="10000" class="tableInput">
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <label for="param_T0">T₀ Value (°C):</label>
                        </td>
                        <td>
                            <input type="number" id="param_T0" name="param_T0" value="25" class="tableInput">
                        </td>
                    </tr>
                    <tr>
                        <td colspan="2">
                            <button onclick="updateValue()">Generate Table</button>
                        </td>
                    </tr>
                </table>
            </div>
        </section>

        <section>
            <h2 class="section-title">Results</h2>

            <!-- 动态生成的表格 -->
            <div style="max-height: 400px; overflow-y: auto; margin-bottom: 20px;">
                <table id="rtTable">
                    <thead>
                        <tr>
                            <th>Temperature (°C)</th>
                            <th>Resistance (Ω)</th>
                        </tr>
                    </thead>
                    <tbody>
                        <!-- 数据将通过JavaScript动态插入 -->
                    </tbody>
                </table>
            </div>

            <!-- JSON 数据文本框 -->
            <h3>JSON Data</h3>
            <textarea id="jsonData" readonly></textarea>

            <!-- C语言数组文本框 -->
            <h3>C Language Arrays</h3>
            <textarea id="cArrayData" readonly></textarea>
        </section>
    </div>

    <script>
        var param_T_min = parseFloat(document.getElementById("param_T_min").value);
        var param_T_max = parseFloat(document.getElementById("param_T_max").value);
        var param_step = parseFloat(document.getElementById("param_step").value);
        var param_B = parseFloat(document.getElementById("param_B").value);
        var param_R0 = parseFloat(document.getElementById("param_R0").value);
        var param_T0 = parseFloat(document.getElementById("param_T0").value);

        // 生成 NTC10K B3950 RT 表
        function generateNTC10KTable(param_T_min, param_T_max, param_step, R0, B, T0) {
            const table = [];
            for (let T = param_T_min; T <= param_T_max; T += param_step) {
                const Tk = T + 273.15; // 转换为 Kelvin
                const R = R0 * Math.exp(B * (1 / Tk - 1 / T0)); // NTC 电阻公式
                table.push({ temperature: T, resistance: R });
            }
            return table;
        }

        // 显示 RT 表到 HTML 表格
        function displayTable(data) {
            const tbody = document.getElementById("rtTable").querySelector("tbody");
            tbody.innerHTML = "";  // 清空表格内容
            data.forEach(row => {
                const tr = document.createElement("tr");
                tr.innerHTML = `<td>${row.temperature}</td><td>${row.resistance}</td>`;
                tbody.appendChild(tr);
            });
        }

        // 显示 JSON 数据到文本框
        function displayJsonData(data) {
            const jsonData = JSON.stringify(data, null, 4); // 格式化JSON
            const textarea = document.getElementById("jsonData");
            textarea.value = jsonData;
        }

        // 显示 C 语言数组到文本框
        function displayCArrayData(data) {
            const temperatures = data.map(row => row.temperature); // 提取温度值
            const resistances = data.map(row => row.resistance);   // 提取电阻值

            var resVal = param_R0;
            if (param_R0 >= 1e6) {
                resVal = Math.round(param_R0 / 1e6) + 'M';
            }
            else if (param_R0 >= 1e3) {
                resVal = Math.round(param_R0 / 1e3) + 'K';
            }
            var prefix = (param_T_min < 0 ? 'N' : 'P') + Math.abs(param_T_min).toString() + 'to' + (param_T_max < 0 ? 'N' : 'P') + Math.abs(param_T_max).toString() + '_' + param_step.toString();
            const cArrayTempSize = `const uint16_t RT_table_NTC${resVal}_B${param_B}_${prefix}_size = ${temperatures.length};`;
            const cArrayTemp = `const double RT_table_NTC${resVal}_B${param_B}_${prefix}_T[${temperatures.length}] = { ${temperatures.join(", ")} };`;
            const cArrayRes = `const double RT_table_NTC${resVal}_B${param_B}_${prefix}_R[${resistances.length}] = { ${resistances.join(", ")} };`;

            const textarea = document.getElementById("cArrayData");
            textarea.value = `${cArrayTempSize}\n\n${cArrayTemp}\n\n${cArrayRes}`;
        }

        // 使用设置参数更新值
        function updateValue() {
            param_T_min = parseFloat(document.getElementById("param_T_min").value);
            param_T_max = parseFloat(document.getElementById("param_T_max").value);
            param_step = parseFloat(document.getElementById("param_step").value);
            param_B = parseFloat(document.getElementById("param_B").value);
            param_R0 = parseFloat(document.getElementById("param_R0").value);
            param_T0 = parseFloat(document.getElementById("param_T0").value) + 273.15;  // 转为 Kelvin
            // 生成 RT 表数据
            const rtData = generateNTC10KTable(param_T_min, param_T_max, param_step, param_R0, param_B, param_T0);
            // 显示数据
            displayTable(rtData);       // 显示表格
            displayJsonData(rtData);    // 显示JSON数据
            displayCArrayData(rtData);  // 显示C语言数组数据
        }
        updateValue();
    </script>
</body>

</html>