Emc2101 fan controller driver

Source/Meadow.Foundation.Peripherals/ICs.FanControllers.Emc2101/Driver/Emc2021.Constants.cs

@@ -0,0 +1,10 @@
+namespace Meadow.Foundation.ICs.FanControllers
+{
+    public partial class Emc2101
+    {
+        const byte MaxLutTemperature = 0x7F; //in celcius - 7 bit value
+        const byte MaxFanSpeed = 0x3F; //scaled to 100% - 6 bit value
+        const double FanRpmNumerator = 5400000;
+        const double TemperatureBit = 0.125;
+    }
+}

Source/Meadow.Foundation.Peripherals/ICs.FanControllers.Emc2101/Driver/Emc2101.Enums.cs

@@ -0,0 +1,191 @@
+namespace Meadow.Foundation.ICs.FanControllers
+{
+    public partial class Emc2101
+    {
+        enum Registers : byte
+        {
+            InternalTemperature = 0x00,
+            ExternalTemperatureLSB = 0x01,
+            Status = 0x02,
+            Configuration = 0x03,
+            DataRate = 0x04,
+            ExternalTemperatureMSB = 0x10,
+            ForceTemperature = 0x0C, //for LUT testing
+            TachLSB = 0x46,
+            TachMSB = 0x47,
+            TachLimitLSB = 0x48,
+            TachLimitMSB = 0x49,
+            FanConfiguration = 0x4A,
+            FanSpinup = 0x4B,
+            FanSetting = 0x4C,
+            ChipID = 0xFD,
+            PwmFrequency = 0x4D,
+            PwmDivisor = 0x4E,
+            LutHysteresis = 0x4F,
+            LutStartRegister = 0x50,
+        }
+
+        /// <summary>
+        /// The fan spinup drive
+        /// </summary>
+        public enum FanSpinupDrive : byte
+        {
+            /// <summary>
+            /// 0 drive
+            /// </summary>
+            Bypass = 0x00,
+            /// <summary>
+            /// 50 percent drive
+            /// </summary>
+            HalfDrive = 0x08,
+            /// <summary>
+            /// 75 percent drive
+            /// </summary>
+            ThreeQuartersDrive = 0x09,
+            /// <summary>
+            /// 100 percent drive
+            /// </summary>
+            FullDrive = 0x10,
+        }
+
+        /// <summary>
+        /// The fan spin up time
+        /// </summary>
+        public enum FanSpinupTime : byte
+        {
+            /// <summary>
+            /// 0 seconds to spin up the fan
+            /// </summary>
+            _0sec = 0x00,
+            /// <summary>
+            /// 0.05 seconds to spin up the fan
+            /// </summary>
+            _0_05sec = 0x01,
+            /// <summary>
+            /// 0.1 seconds to spin up the fan
+            /// </summary>
+            _0_1sec = 0x02,
+            /// <summary>
+            /// 0.2 seconds to spin up the fan
+            /// </summary>
+            _0_2sec = 0x03,
+            /// <summary>
+            /// 0.4 seconds to spin up the fan
+            /// </summary>
+            _0_4sec = 0x04,
+            /// <summary>
+            /// 0.8 seconds to spin up the fan
+            /// </summary>
+            _0_8sec = 0x05,
+            /// <summary>
+            /// 1.6 seconds to spin up the fan
+            /// </summary>
+            _1_6sec = 0x06,
+            /// <summary>
+            /// 3.2 seconds to spin up the fan (default)
+            /// </summary>
+            _3_2sec = 0x07,
+        }
+
+        /// <summary>
+        /// The EMC2021 data rate
+        /// </summary>
+        public enum DataRate : byte
+        {
+            /// <summary>
+            /// 1.16hz
+            /// </summary>
+            _1_16hz,
+            /// <summary>
+            /// 1.8hz
+            /// </summary>
+            _1_8hz,
+            /// <summary>
+            /// 1.4hz
+            /// </summary>
+            _1_4hz,
+            /// <summary>
+            /// 1.2hz
+            /// </summary>
+            _1_2hz,
+            /// <summary>
+            /// 1hz
+            /// </summary>
+            _1hz,
+            /// <summary>
+            /// 2hz
+            /// </summary>
+            _2hz,
+            /// <summary>
+            /// 4hz
+            /// </summary>
+            _4hz,
+            /// <summary>
+            /// 8hz
+            /// </summary>
+            _8hz,
+            /// <summary>
+            /// 16hz
+            /// </summary>
+            _16hz,
+            /// <summary>
+            /// 32hz
+            /// </summary>
+            _32hz,   
+        }
+
+        /// <summary>
+        /// Valid addresses for the sensor
+        /// </summary>
+        public enum Address : byte
+        {
+            /// <summary>
+            /// Bus address 0x4C
+            /// </summary>
+            Address_0x4C = 0x4C,
+            /// <summary>
+            /// Default bus address
+            /// </summary>
+            Default = Address_0x4C
+        }
+
+        /// <summary>
+        /// The temperature lookup table index
+        /// </summary>
+        public enum LutIndex : byte
+        {
+            /// <summary>
+            /// LUT Index 0
+            /// </summary>
+            Index0,
+            /// <summary>
+            /// LUT Index 1
+            /// </summary>
+            Index1,
+            /// <summary>
+            /// LUT Index 2
+            /// </summary>
+            Index2,
+            /// <summary>
+            /// LUT Index 3
+            /// </summary>
+            Index3,
+            /// <summary>
+            /// LUT Index 4
+            /// </summary>
+            Index4,
+            /// <summary>
+            /// LUT Index 5
+            /// </summary>
+            Index5,
+            /// <summary>
+            /// LUT Index 6
+            /// </summary>
+            Index6,
+            /// <summary>
+            /// LUT Index 7
+            /// </summary>
+            Index7,
+        }
+    }
+}