added storage info

source/Meadow.Core/StorageInformation.cs

@@ -0,0 +1,18 @@
+using Meadow.Units;
+
+namespace Meadow;
+
+/// <summary>
+/// Information about available storage devices
+/// </summary>
+public abstract class StorageInformation : IStorageInformation
+{
+    /// <inheritdoc/>
+    public string Name { get; protected set; } = default!;
+
+    /// <inheritdoc/>
+    public DigitalStorage SpaceAvailable { get; protected set; } = default!;
+
+    /// <inheritdoc/>
+    public DigitalStorage Size { get; protected set; } = default!;
+}

source/implementations/f7/Meadow.F7/F7PlatformOS.Storage.cs

@@ -1,10 +1,60 @@
-namespace Meadow;
+using Meadow.Devices;
+using System.IO;
+using System.Linq;
+
+namespace Meadow;
+
 
 public partial class F7PlatformOS : IPlatformOS
 {
+    private const long FeatherV1TotalFlash = 33_554_432; // 32MB
+    private const long FeatherV2TotalFlash = 33_554_432; // 32MB
+    private const long RuntimeAllocationSize = 3_145_728; // 3MB
+    private const long OtAAllocationSize = 2_097_152; // 2MB
+
+    /// <summary>
+    /// Meadow F7-specific storage information
+    /// </summary>
+    public class F7StorageInformation : StorageInformation
+    {
+        internal static F7StorageInformation Create(IMeadowDevice device)
+        {
+            long totalFlashAvailable;
+            if (device is F7FeatherV1)
+            {
+                totalFlashAvailable = FeatherV1TotalFlash - RuntimeAllocationSize - OtAAllocationSize;
+            }
+            else
+            {
+                totalFlashAvailable = FeatherV2TotalFlash - RuntimeAllocationSize - OtAAllocationSize;
+            }
+
+            var spaceConsumed = new DirectoryInfo("/meadow0")
+                .EnumerateFiles("*", SearchOption.AllDirectories)
+                .Sum(file => file.Length);
+
+            return new F7StorageInformation
+            {
+                Name = "Internal Flash",
+                Size = new Units.DigitalStorage(totalFlashAvailable),
+                SpaceAvailable = new Units.DigitalStorage(totalFlashAvailable - spaceConsumed)
+            };
+        }
+    }
+
     /// <summary>
     /// Gets the file system information for the platform.
     /// </summary>
     public Meadow.IPlatformOS.FileSystemInfo FileSystem { get; private set; } = default!;
 
+    /// <inheritdoc/>
+    public IStorageInformation[] GetStorageInformation()
+    {
+        // TODO: support external storage for MMC-enabled CCM devices
+
+        return new IStorageInformation[]
+            {
+                F7StorageInformation.Create(Resolver.Device)
+            };
+    }
 }

source/implementations/f7/Meadow.F7/F7PlatformOS.cs

@@ -87,11 +87,9 @@ public AllocationInfo GetMemoryAllocationInfo()
         return Core.Interop.Nuttx.mallinfo();
     }
 
-    /// <summary>
-    /// Retrieves the current processor usage (as a percentage in the range of 0-100)
-    /// </summary>
-    public int ProcessorLoad()
+    /// <inheritdoc/>
+    public int[] GetProcessorUtilization()
     {
-        return 100 - Core.Interop.Nuttx.meadow_idle_monitor_get_value();
+        return new int[100 - Core.Interop.Nuttx.meadow_idle_monitor_get_value()];
     }
 }

source/implementations/f7/Meadow.F7/Interop/Interop.clock_gettime.cs

@@ -1,5 +1,4 @@
-using System;
-using System.Runtime.InteropServices;
+using System.Runtime.InteropServices;
 
 namespace Meadow.Core
 {

source/implementations/f7/Meadow.F7/Interop/Interop.clock_settime.cs

@@ -1,5 +1,4 @@
-using System;
-using System.Runtime.InteropServices;
+using System.Runtime.InteropServices;
 
 namespace Meadow.Core
 {

source/implementations/f7/Meadow.F7/Interop/Interop.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Runtime.InteropServices;
-
-namespace Meadow.Core
+namespace Meadow.Core
 {
     internal static partial class Interop
     {

source/implementations/f7/Meadow.F7/Interop/Interop.gpio.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Runtime.InteropServices;
 
 namespace Meadow.Core
 {

source/implementations/f7/Meadow.F7/Interop/Interop.ioctl.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Runtime.InteropServices;
 using System.Text;
-using Meadow.Devices.Esp32.MessagePayloads;
 
 namespace Meadow.Core
 {
@@ -58,7 +57,7 @@ public enum GpioIoctlFn
 
             [DllImport(LIBRARY_NAME, SetLastError = true)]
             public static extern int ioctl(IntPtr fd, UpdIoctlFn request, ref Nuttx.UpdSleepCommand command);
-            
+
             /// <summary>
             /// Configures the Universal Platform Driver to catch GPIO interrupts
             /// </summary>

source/implementations/f7/Meadow.F7/UPD.cs

@@ -3,7 +3,6 @@
 using System;
 using System.Collections.Generic;
 using static Meadow.Core.Interop;
-using Meadow.Devices.Esp32.MessagePayloads;
 
 namespace Meadow.Devices
 {
@@ -168,7 +167,7 @@ public static int Ioctl(Nuttx.UpdIoctlFn request, Nuttx.UpdSleepCommand command)
             }
             return result;
         }
-        
+
 
         public static int Ioctl(Nuttx.UpdIoctlFn request, ref Nuttx.UpdGpioInterruptConfiguration interruptConfig)
         {
@@ -274,7 +273,7 @@ public static int Ioctl(Nuttx.UpdIoctlFn request, ref Nuttx.UpdEsp32Command cmd)
             {
                 var err = GetLastError();
                 Resolver.Log.Error($"ioctl {request} failed {err}");
-                return (int) err;
+                return (int)err;
             }
             return result;
         }
@@ -286,7 +285,7 @@ public static int Ioctl(Nuttx.UpdIoctlFn request, ref Nuttx.UpdEsp32EventDataPay
             {
                 var err = GetLastError();
                 Resolver.Log.Error($"ioctl {request} failed {err}");
-                return (int) err;
+                return (int)err;
             }
             return result;
         }
@@ -298,7 +297,7 @@ public static int Ioctl(Nuttx.UpdIoctlFn request, ref Nuttx.UpdConfigurationValu
             {
                 var err = GetLastError();
                 Resolver.Log.Error($"ioctl {request} failed {err}");
-                return (int) err;
+                return (int)err;
             }
             return result;
         }

source/implementations/linux/Meadow.Linux/PlatformOS/LinuxPlatformOS.cs

@@ -212,4 +212,14 @@ public byte[] AesDecrypt(byte[] encryptedValue, byte[] key, byte[] iv)
             }
         }
     }
+
+    public int[] GetProcessorUtilization()
+    {
+        throw new NotImplementedException();
+    }
+
+    public IStorageInformation[] GetStorageInformation()
+    {
+        throw new NotImplementedException();
+    }
 }

source/implementations/simulation/Meadow.Simulation/SimulatedPlatformOS.cs

@@ -156,4 +156,14 @@ public byte[] AesDecrypt(byte[] encryptedValue, byte[] key, byte[] iv)
             }
         }
     }
+
+    public int[] GetProcessorUtilization()
+    {
+        throw new NotImplementedException();
+    }
+
+    public IStorageInformation[] GetStorageInformation()
+    {
+        throw new NotImplementedException();
+    }
 }