first commit

Software/CSharp/GrovePi/Sensors/ChainableRgbLed.cs

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+using System;
+
+namespace GrovePi.Sensors
+{
+    public interface IChainableRgbLed
+    {
+        IChainableRgbLed Initialise(byte numberOfLeds);
+        IChainableRgbLed StoreColor(byte red, byte green, byte blue);
+        IChainableRgbLed Test(byte numberOfLeds, byte testColor);
+        IChainableRgbLed SetPattern(byte pattern, byte led);
+        IChainableRgbLed Mudulo(byte offset, byte divisor);
+        IChainableRgbLed SetLevel(byte level, bool reverse);
+    }
+
+    internal class ChainableRgbLed : IChainableRgbLed
+    {
+        public const byte StoreColorCommandAddress = 90;
+        public const byte InitialiseCommandAddress = 91;
+        public const byte TestCommandAddress = 92;
+        public const byte SetPatternCommandAddress = 93;
+        public const byte SetModuloCommandAddress = 94;
+        public const byte SetLevelCommmandAddress = 95;
+        private readonly GrovePi _device;
+        private readonly Pin _pin;
+
+        internal ChainableRgbLed(GrovePi device, Pin pin)
+        {
+            if (device == null) throw new ArgumentNullException(nameof(device));
+            _device = device;
+            _pin = pin;
+        }
+
+        public IChainableRgbLed SetLevel(byte level, bool reverse)
+        {
+            var buffer = new[] {level, (byte) _pin, level, reverse ? (byte) 1 : (byte) 0};
+            _device.DirectAccess.Write(buffer);
+            return this;
+        }
+
+        public IChainableRgbLed Initialise(byte numberOfLeds)
+        {
+            var buffer = new[] {InitialiseCommandAddress, (byte) _pin, numberOfLeds, Constants.Unused};
+            _device.DirectAccess.Write(buffer);
+            return this;
+        }
+
+        public IChainableRgbLed StoreColor(byte red, byte green, byte blue)
+        {
+            var buffer = new[] {StoreColorCommandAddress, red, green, blue};
+            _device.DirectAccess.Write(buffer);
+            return this;
+        }
+
+        public IChainableRgbLed Test(byte numberOfLeds, byte testColor)
+        {
+            var buffer = new[] {TestCommandAddress, (byte) _pin, numberOfLeds, testColor};
+            _device.DirectAccess.Write(buffer);
+            return this;
+        }
+
+        public IChainableRgbLed SetPattern(byte pattern, byte led)
+        {
+            var buffer = new[] {SetPatternCommandAddress, (byte) _pin, pattern, led};
+            _device.DirectAccess.Write(buffer);
+            return this;
+        }
+
+        public IChainableRgbLed Mudulo(byte offset, byte divisor)
+        {
+            var buffer = new[] {SetModuloCommandAddress, (byte) _pin, offset, divisor};
+            _device.DirectAccess.Write(buffer);
+            return this;
+        }
+    }
+}