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Add DAC sample pack
Signed-off-by: José Simões <[email protected]>
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‎README.md

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<td><a href="samples/RTC">RTC Sample</a></td>
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</tr>
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<td><a href="samples/SPI">SPI</a></td>
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<td><!--<a href="PWM">PWM</a>--></td>
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<td><a href="DAC">DAC</a></td>
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<td><!--<a href="RTXC">RTC Sample</a>--></td>
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</tr>
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</table>

‎samples/DAC/DacSample.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 15
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VisualStudioVersion = 15.0.28307.705
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{11A8DD76-328B-46DF-9F39-F559912D0360}") = "DacSample", "DacSample\DacSample.nfproj", "{ACD083DD-5FCF-4E14-A1D0-AEDE3E63EE4C}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{ACD083DD-5FCF-4E14-A1D0-AEDE3E63EE4C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{ACD083DD-5FCF-4E14-A1D0-AEDE3E63EE4C}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{ACD083DD-5FCF-4E14-A1D0-AEDE3E63EE4C}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
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{ACD083DD-5FCF-4E14-A1D0-AEDE3E63EE4C}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{ACD083DD-5FCF-4E14-A1D0-AEDE3E63EE4C}.Release|Any CPU.Build.0 = Release|Any CPU
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{ACD083DD-5FCF-4E14-A1D0-AEDE3E63EE4C}.Release|Any CPU.Deploy.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {C473C2A3-0D26-4443-952F-48122E878D1B}
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EndGlobalSection
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EndGlobal

‎samples/DAC/DacSample/DacSample.nfproj

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup Label="Globals">
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<NanoFrameworkProjectSystemPath>$(MSBuildToolsPath)..\..\..\nanoFramework\v1.0\</NanoFrameworkProjectSystemPath>
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</PropertyGroup>
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<Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.Default.props" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.Default.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectTypeGuids>{11A8DD76-328B-46DF-9F39-F559912D0360};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
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<ProjectGuid>acd083dd-5fcf-4e14-a1d0-aede3e63ee4c</ProjectGuid>
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<OutputType>Exe</OutputType>
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<AppDesignerFolder>Properties</AppDesignerFolder>
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<FileAlignment>512</FileAlignment>
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<RootNamespace>DacSample</RootNamespace>
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<AssemblyName>DacSample</AssemblyName>
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<TargetFrameworkVersion>v1.0</TargetFrameworkVersion>
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</PropertyGroup>
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<Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.props" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.props')" />
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<ItemGroup>
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<Compile Include="Scenario1ConfigureDac.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<Compile Include="Scenario4SineWave.cs" />
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<Compile Include="Scenario3SquareWave.cs" />
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<Compile Include="Scenario2TriangleWave.cs" />
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</ItemGroup>
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<ItemGroup>
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<Reference Include="mscorlib, Version=1.2.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
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<HintPath>..\packages\nanoFramework.CoreLibrary.1.2.6-preview.7\lib\mscorlib.dll</HintPath>
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<Private>True</Private>
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<SpecificVersion>True</SpecificVersion>
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</Reference>
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<Reference Include="System.Devices.Dac, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
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<HintPath>..\packages\nanoFramework.System.Devices.Dac.1.0.0-preview.17\lib\System.Devices.Dac.dll</HintPath>
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<Private>True</Private>
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<SpecificVersion>True</SpecificVersion>
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</Reference>
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<Reference Include="System.Math, Version=1.0.6.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
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<HintPath>..\packages\nanoFramework.System.Math.1.0.6-preview.15\lib\System.Math.dll</HintPath>
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<Private>True</Private>
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<SpecificVersion>True</SpecificVersion>
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</Reference>
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</ItemGroup>
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<ItemGroup>
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<None Include="packages.config" />
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</ItemGroup>
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<Import Project="$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets" Condition="Exists('$(NanoFrameworkProjectSystemPath)NFProjectSystem.CSharp.targets')" />
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<ProjectExtensions>
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<ProjectCapabilities>
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<ProjectConfigurationsDeclaredAsItems />
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</ProjectCapabilities>
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</ProjectExtensions>
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</Project>

‎samples/DAC/DacSample/Properties/AssemblyInfo.cs

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using System.Reflection;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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// General Information about an assembly is controlled through the following
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// set of attributes. Change these attribute values to modify the information
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// associated with an assembly.
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[assembly: AssemblyTitle("CSharp.BlankApplication")]
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[assembly: AssemblyDescription("")]
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[assembly: AssemblyConfiguration("")]
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[assembly: AssemblyCompany("")]
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[assembly: AssemblyProduct("CSharp.BlankApplication")]
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[assembly: AssemblyCopyright("Copyright © ")]
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[assembly: AssemblyTrademark("")]
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[assembly: AssemblyCulture("")]
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// Setting ComVisible to false makes the types in this assembly not visible
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// to COM components. If you need to access a type in this assembly from
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// COM, set the ComVisible attribute to true on that type.
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[assembly: ComVisible(false)]
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// Version information for an assembly consists of the following four values:
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//
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// Major Version
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// Minor Version
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// Build Number
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// Revision
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//
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// You can specify all the values or you can default the Build and Revision Numbers
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// by using the '*' as shown below:
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// [assembly: AssemblyVersion("1.0.*")]
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[assembly: AssemblyVersion("1.0.0.0")]
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[assembly: AssemblyFileVersion("1.0.0.0")]

‎samples/DAC/DacSample/Scenario1ConfigureDac.cs

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//
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// Copyright (c) 2019 The nanoFramework project contributors
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// See LICENSE file in the project root for full license information.
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//
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using System;
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using System.Devices.Dac;
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using System.Threading;
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namespace DacSample
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{
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public class Scenario1ConfigureDac
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{
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static internal int dacResolution;
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/// <summary>
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/// Time resolution to update the DAC output in milliseconds.
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/// </summary>
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/// <remarks>
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/// Default is 10ms.
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/// </remarks>
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internal const int s_timeResolution = 5;
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public static void Main()
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{
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string devices = DacController.GetDeviceSelector();
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Console.WriteLine("DAC controllers: " + devices);
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// get default controller
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DacController dac = DacController.GetDefault();
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// open channel 0
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DacChannel dacChannel = dac.OpenChannel(0);
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// get DAC resolution
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dacResolution = dac.ResolutionInBits;
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// uncomment the scenario to test
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/////////////////////////////////////////
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// !!note that none of these returns!! //
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/////////////////////////////////////////
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Scenario2TriangleWave.Execute(ref dacChannel);
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//Scenario3SquareWave.Execute(ref dacChannel);
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//Scenario4SineWave.Execute(ref dacChannel);
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Thread.Sleep(Timeout.Infinite);
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}
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}
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}

‎samples/DAC/DacSample/Scenario2TriangleWave.cs

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//
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// Copyright (c) 2019 The nanoFramework project contributors
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// See LICENSE file in the project root for full license information.
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//
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using System;
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using System.Devices.Dac;
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using System.Threading;
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namespace DacSample
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{
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internal static class Scenario2TriangleWave
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{
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public static void Execute(ref DacChannel channel)
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{
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UInt32 value = 0;
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uint increment = 0;
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bool goingUp = false;
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int upperValue;
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// get upper value from DAC resolution
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upperValue = (int)Math.Pow(2, Scenario1ConfigureDac.dacResolution);
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// compute a reasonable increment value from the the DAC resolution
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increment = (uint)Math.Pow(2, (Scenario1ConfigureDac.dacResolution / 2));
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for (; ; )
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{
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if (value == upperValue)
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{
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// tweak the value so it doesn't overflow the DAC
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value--;
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channel.WriteValue((ushort)value);
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value++;
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// invert to go down
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goingUp = false;
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}
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else if (value == 0)
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{
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channel.WriteValue((ushort)value);
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// invert to go up
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goingUp = true;
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}
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else
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{
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channel.WriteValue((ushort)value);
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}
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if (goingUp)
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{
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value += increment;
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}
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else
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{
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value -= increment;
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}
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Thread.Sleep(Scenario1ConfigureDac.s_timeResolution);
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}
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}
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}
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}

‎samples/DAC/DacSample/Scenario3SquareWave.cs

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//
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// Copyright (c) 2019 The nanoFramework project contributors
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// See LICENSE file in the project root for full license information.
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//
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using System;
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using System.Devices.Dac;
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using System.Threading;
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namespace DacSample
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{
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internal static class Scenario3SquareWave
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{
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public static void Execute(ref DacChannel channel)
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{
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int value = 0;
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int upperValue;
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int periodCounter = 0;
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int halfPeriod;
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// get upper value from DAC resolution
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upperValue = (int)Math.Pow(2, Scenario1ConfigureDac.dacResolution);
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// figure out an expedite way to get a more or less square wave from the DAC and time resolution
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halfPeriod = ( upperValue / (Scenario1ConfigureDac.s_timeResolution * 10) ) / 2;
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for (;;)
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{
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if (periodCounter == halfPeriod)
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{
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// tweak the value so it doesn't overflow the DAC
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value = upperValue - 1;
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}
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else if (periodCounter == halfPeriod * 2)
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{
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value = 0;
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periodCounter = 0;
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}
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channel.WriteValue((ushort)value);
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Thread.Sleep(Scenario1ConfigureDac.s_timeResolution);
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periodCounter++;
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}
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}
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}
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}

‎samples/DAC/DacSample/Scenario4SineWave.cs

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//
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// Copyright (c) 2019 The nanoFramework project contributors
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// See LICENSE file in the project root for full license information.
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//
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using System;
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using System.Devices.Dac;
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using System.Threading;
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namespace DacSample
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{
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internal static class Scenario4SineWave
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{
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const float maxRads = (float)(2 * Math.PI);
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public static void Execute(ref DacChannel channel)
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{
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UInt32 value = 0;
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float increment = 0;
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int upperValue, midRange;
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float radian = 0;
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// get upper value from DAC resolution
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upperValue = (int)Math.Pow(2, Scenario1ConfigureDac.dacResolution);
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// compute a reasonable increment value from the resolution
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increment = maxRads / (Scenario1ConfigureDac.dacResolution * 10) ;
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midRange = upperValue / 2;
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for (; ; )
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{
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// because the DAC can't output negative values
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// we have to offset the sine wave to half the DAC output range
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value = (uint)((Math.Sin(radian) * (midRange - 1)) + midRange);
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// output to DAC
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channel.WriteValue((ushort)value);
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// increment angle
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radian += increment;
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if (radian >= maxRads)
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{
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// tweak the value so it doesn't overflow the DAC
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radian = 0;
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}
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Thread.Sleep(Scenario1ConfigureDac.s_timeResolution);
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}
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}
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}
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}

‎samples/DAC/DacSample/packages.config

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<?xml version="1.0" encoding="utf-8"?>
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<packages>
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<package id="nanoFramework.CoreLibrary" version="1.2.6-preview.7" targetFramework="netnanoframework10" />
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<package id="nanoFramework.System.Devices.Dac" version="1.0.0-preview.17" targetFramework="netnanoframework10" />
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<package id="nanoFramework.System.Math" version="1.0.6-preview.15" targetFramework="netnanoframework10" />
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</packages>

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