//Copyright 2012-2019 Keysight Technologies
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//
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//Licensed under the Apache License, Version 2.0 (the "License");
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//you may not use this file except in compliance with the License.
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//You may obtain a copy of the License at
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//
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//http://www.apache.org/licenses/LICENSE-2.0
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//
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//Unless required by applicable law or agreed to in writing, software
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//distributed under the License is distributed on an "AS IS" BASIS,
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//WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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//See the License for the specific language governing permissions and
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//limitations under the License.
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using System.Collections.Generic;
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using System.Linq;
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using OpenTap;
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namespace OpenTap.Plugins.ExamplePlugin
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{
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// As with Test Steps, the Display attribute can also be used with Instruments.
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[Display(Groups: new[] { "Examples", "Example Plugin" }, Name: "Low Pass Filter", Description: "A simulated low pass filter.")]
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// All TAP DUTs inherit from the Dut base class.
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public class LowPassFilterDut : Dut
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{
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// LowPassFilterDut inherits two properties (Comment and Id) from DUT class.
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// Additional DUT properties can be added here.
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// Internal properties are not shown in the GUI.
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internal int WindowSize { get; set; }
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public LowPassFilterDut()
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{
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// Name defines the name that new instances of this class will use.
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// This is how the DUT will appear in the Resource Bar and in the Step Settings of Test Steps.
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// More than one instance is made unique by automatically appending an integer suffix.
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Name = "Filter";
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// Default settings can be configured in the constructor.
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ID = "KS000000";
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}
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// Open procedure for the DUT.
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public override void Open()
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{
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// Add code needed for opening the resource here.
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// This will be called at the beginning of a TestPlan.
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base.Open();
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// DUTs also have access to a Log object.
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Log.Info(string.Format("The DUT ID is {0}", ID));
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}
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// Close procedure for the DUT.
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public override void Close()
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{
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// Add code needed for closing the resource here.
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// This will be called at the end of a TestPlan execution.
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base.Close();
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}
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// Since this is a simulation of a low pass filter (LPF) the processing is inside the DUT.
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// The LPF is implemented by a moving average.
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internal double[] CalcMovingAverage(double[] inputData)
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{
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int size = inputData.Length;
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List<double> windowValues = new List<double>();
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double[] movingAverage = new double[size];
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for (int i = 0; i < size; i++)
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{
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// Add the newest one.
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windowValues.Add(inputData[i]);
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if (i < WindowSize)
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{
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movingAverage[i] = 0;
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}
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else
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{
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movingAverage[i] = windowValues.Average();
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// Take off the oldest.
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windowValues.RemoveAt(0);
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}
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}
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return movingAverage;
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}
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}
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}
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