From ff2debfae4f46ba97c6b6de8d6698fc9554fc491 Mon Sep 17 00:00:00 2001
From: Tanson <tansenen@163.com>
Date: Sat, 24 Dec 2016 02:32:23 +0800
Subject: [PATCH] add BH1750 Sensor

---
 .../Sensors/Light/BH1750Connection.cs         | 53 +++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Raspberry.IO.Components/Sensors/Light/BH1750Connection.cs

diff --git a/Raspberry.IO.Components/Sensors/Light/BH1750Connection.cs b/Raspberry.IO.Components/Sensors/Light/BH1750Connection.cs
new file mode 100644
index 0000000..d840259
--- /dev/null
+++ b/Raspberry.IO.Components/Sensors/Light/BH1750Connection.cs
@@ -0,0 +1,53 @@
+using Raspberry.IO.InterIntegratedCircuit;
+using Raspberry.Timers;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Raspberry.IO.Components.Sensors.Light
+{
+    namespace RPI.Sensor.Sensors.Light
+    {
+        public class BH1750Connection
+        {
+            public I2cDeviceConnection Connection { get; set; }
+            public BH1750Connection(I2cDeviceConnection connection)
+            {
+                Connection = connection;
+            }
+
+            public void SetOff()
+            {
+                Connection.Write(0x00);
+            }
+            public void SetOn()
+            {
+                Connection.Write(0x01);
+            }
+            public void Reset()
+            {
+                Connection.Write(0x07);
+            }
+
+            public double GetData()
+            {
+                Connection.Write(0x10);
+                HighResolutionTimer.Sleep(TimeSpanUtility.FromMicroseconds(150 * 1000));
+                byte[] readBuf = Connection.Read(2);
+
+                var valf = readBuf[0] << 8;
+                valf |= readBuf[1];
+                return valf / 1.2 * (69 / 69) / 1;
+
+                // var valf = ((readBuf[0] << 8) | readBuf[1]) / 1.2;
+                // return valf;
+
+                // return Math.Round(valf / (2 * 1.2), 2);
+
+            }
+
+        }
+    }
+
+}