initial commit for possible changes on SPI device and data

Author: DanielSSilva

src/Microsoft.PowerShell.IoT/SPI/Get/GetSPIDevice.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Management.Automation;
+using System.Device.Spi;
+using System.Device.Gpio;
+
+[Cmdlet(VerbsCommon.Get, "SPIDevice")]
+public class GetSPIDevice : Cmdlet
+{
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 0)]
+    public int BusId { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 1)]
+    public int ChipSelectLine { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 2)]
+    public int Frequency { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 3)]
+    public int DataBitLength { get; set;}
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 4)]
+    public SpiMode Mode { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 5)]
+    public DataFlow DataFlow { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 6)]
+    public PinValue ChipSelectLineActiveState { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true)]
+    public SwitchParameter Raw { get; set; }
+
+    public GetSPIDevice()
+    {
+        this.BusId = 0;
+        this.ChipSelectLine = 0;
+        this.Frequency = 500_000; // 500 KHz default speed
+    }
+
+    protected override void ProcessRecord()
+    {
+        var settings = new SpiConnectionSettings(this.BusId, this.ChipSelectLine)
+        {
+            ClockFrequency = this.Frequency,
+            DataBitLength = this.DataBitLength,
+            Mode = this.Mode,
+            DataFlow = this.DataFlow,
+            ChipSelectLineActiveState = this.ChipSelectLineActiveState
+        };
+
+        SpiDevice spiDevice = SpiDevice.Create(settings);
+        //TODO: This can be done this way if we follow the same logic as in I2C where we access the device by doing device.Device
+        // WriteObject(new SPIDevice(spiDevice, this.BusId, this.ChipSelectLine, this.Frequency, 
+        //                             this.DataBitLength, this.Mode, this.DataFlow, 
+        //                             this.ChipSelectLineActiveState));
+        //Because I'm currently testing this like this : $device = Get-SPIDevice -Frequency 2400000 -Mode Mode0 -DataBitLength 8 -BusId 0 -ChipSelectLine 0
+        // I want the returned object to be the spiDevice created.
+        WriteObject(spiDevice);
+        
+    }
+}

src/Microsoft.PowerShell.IoT/SPI/SPIData.cs

@@ -1,16 +1,34 @@
-public class SPIData
+// public class SPIData
+// {
+//     public int BusId { get; set; }
+//     public int ChipSelectLine { get; set; }
+//     public int Frequency { get; set; }
+//     public byte[] Data { get; set; }
+//     public byte[] Response { get; set; }
+
+//     public SPIData(int busId, int chipSelectLine, int frequency, byte[] data, byte[] response)
+//     {
+//         this.BusId = busId;
+//         this.ChipSelectLine = chipSelectLine;
+//         this.Frequency = frequency;
+//         this.Data = data;
+//         this.Response = response;
+//     }
+// }
+
+using System.Device.Gpio;
+using System.Device.Spi;
+
+public class SPIData : SPIDevice
 {
-    public int BusId { get; set; }
-    public int ChipSelectLine { get; set; }
-    public int Frequency { get; set; }
     public byte[] Data { get; set; }
     public byte[] Response { get; set; }
 
-    public SPIData(int busId, int chipSelectLine, int frequency, byte[] data, byte[] response)
+    public SPIData(SpiDevice device, int busId, int chipSelectLine, int frequency, 
+                   int dataBitLength, SpiMode mode, DataFlow dataFlow, 
+                   PinValue chipSelectLineActiveState, byte[] data, byte[] response
+                  ): base(device, busId, chipSelectLine, frequency, dataBitLength, mode, dataFlow, chipSelectLineActiveState)
     {
-        this.BusId = busId;
-        this.ChipSelectLine = chipSelectLine;
-        this.Frequency = frequency;
         this.Data = data;
         this.Response = response;
     }

src/Microsoft.PowerShell.IoT/SPI/SPIDevice.cs

@@ -0,0 +1,34 @@
+using System.Device.Gpio;
+using System.Device.Spi;
+
+public class SPIDevice
+{
+    internal SpiDevice device = null;
+    public int BusId { get; set; }
+
+    public int ChipSelectLine { get; set; }
+
+    public int Frequency { get; set; }
+
+    public int DataBitLength { get; set;}
+
+    public SpiMode Mode { get; set; }
+
+    public DataFlow DataFlow { get; set; }
+
+    public PinValue ChipSelectLineActiveState { get; set; }
+
+    public SPIDevice(SpiDevice device, int busId, int chipSelectLine, int frequency, 
+                     int dataBitLength, SpiMode mode, DataFlow dataFlow, 
+                     PinValue chipSelectLineActiveState)
+    {
+        this.device = device;
+        this.BusId = busId;
+        this.ChipSelectLine = chipSelectLine;
+        this.Frequency = frequency;
+        this.DataBitLength = dataBitLength;
+        this.Mode = mode;
+        this.DataFlow = dataFlow;
+        this.ChipSelectLineActiveState = chipSelectLineActiveState;        
+    }
+}

src/Microsoft.PowerShell.IoT/SPI/Send/SendSPIData.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Management.Automation;
 using System.Device.Spi;
+using System.Device.Gpio;
 
 [Cmdlet(VerbsCommunications.Send, "SPIData")]
 public class SendSPIData : Cmdlet
@@ -17,6 +18,18 @@ public class SendSPIData : Cmdlet
     [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 3)]
     public int Frequency { get; set; }
 
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 4)]
+    public int DataBitLength { get; set;}
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 5)]
+    public SpiMode Mode { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 6)]
+    public DataFlow DataFlow { get; set; }
+
+    [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true, Position = 7)]
+    public PinValue ChipSelectLineActiveState { get; set; }
+
     [Parameter(Mandatory = false, ValueFromPipelineByPropertyName = true)]
     public SwitchParameter Raw { get; set; }
 
@@ -29,10 +42,16 @@ public SendSPIData()
 
     protected override void ProcessRecord()
     {
-        var settings = new SpiConnectionSettings(this.BusId, this.ChipSelectLine);
-        settings.ClockFrequency = this.Frequency;
-        
-        using(var spiDevice = SpiDevice.Create(settings))
+        var settings = new SpiConnectionSettings(this.BusId, this.ChipSelectLine)
+        {
+            ClockFrequency = this.Frequency,
+            DataBitLength = this.DataBitLength,
+            Mode = this.Mode,
+            DataFlow = this.DataFlow,
+            ChipSelectLineActiveState = this.ChipSelectLineActiveState
+        };
+
+        using (var spiDevice = SpiDevice.Create(settings))
         {
             var response = new byte[this.Data.Length];
 
@@ -44,7 +63,10 @@ protected override void ProcessRecord()
             }
             else
             {
-                SPIData spiData = new SPIData(this.BusId, this.ChipSelectLine, this.Frequency, this.Data, response);
+                SPIData spiData = new SPIData(spiDevice, this.BusId, this.ChipSelectLine, this.Frequency, 
+                                                  this.DataBitLength, this.Mode, this.DataFlow, 
+                                                  this.ChipSelectLineActiveState, this.Data, response);
+                //SPIData spiData = new SPIData(this.BusId, this.ChipSelectLine, this.Frequency, this.Data, response);
                 WriteObject(spiData);
             }
         }