Add bus timing helpers

nanoFramework.Device.Can/CanTiming.cs

@@ -0,0 +1,83 @@
+//
+// Copyright (c) .NET Foundation and Contributors
+// See LICENSE file in the project root for full license information.
+//
+
+namespace nanoFramework.Device.Can
+{
+    /// <summary>
+    /// Helper for common CAN timings for the STM32
+    /// </summary>
+    public static class CanTimingSTM32
+    {
+        /// <summary>
+        /// 25 KBaud.
+        /// </summary>
+        public static CanSettings Timing500KBaud () {
+            return new CanSettings(6, 8, 1, 0);
+        }
+
+    }
+
+    /// <summary>
+    /// Helper for common CAN timings for the ESP32. Values from https://github.com/espressif/esp-idf/blob/master/components/hal/include/hal/twai_types.h#L54
+    /// </summary>
+    public static class CanTimingESP32
+    {
+        /// <summary>
+        /// 25 KBaud.
+        /// </summary>
+        public static CanSettings Timing25KBaud () {
+            return new CanSettings(128, 16, 8, 3);
+        }
+
+        /// <summary>
+        /// 50 KBaud.
+        /// </summary>
+        public static CanSettings Timing50KBaud () {
+            return new CanSettings(80, 15, 4, 3);
+        }
+
+        /// <summary>
+        /// 100 KBaud.
+        /// </summary>
+        public static CanSettings Timing100KBaud () {
+            return new CanSettings(40, 15, 4, 3);
+        }
+
+        /// <summary>
+        /// 125 KBaud.
+        /// </summary>
+        public static CanSettings Timing125KBaud () {
+            return new CanSettings(32, 15, 4, 3);
+        }
+
+        /// <summary>
+        /// 250 KBaud.
+        /// </summary>
+        public static CanSettings Timing250KBaud () {
+            return new CanSettings(16, 15, 4, 3);
+        }
+
+        /// <summary>
+        /// 500 KBaud.
+        /// </summary>
+        public static CanSettings Timing500KBaud () {
+            return new CanSettings(8, 15, 4, 3);
+        }
+
+        /// <summary>
+        /// 800 KBaud.
+        /// </summary>
+        public static CanSettings Timing800KBaud() {
+            return new CanSettings(4, 16, 8, 3);
+        }
+
+        /// <summary>
+        /// 1000 KBaud.
+        /// </summary>
+        public static CanSettings Timing1000KBaud () {
+            return new CanSettings(4, 15, 4, 3);
+        }
+    }
+}

nanoFramework.Device.Can/nanoFramework.Device.Can.nfproj

@@ -53,6 +53,7 @@
     <Compile Include="CanMessageReceivedEventArgs.cs" />
     <Compile Include="CanControllerEventListener.cs" />
     <Compile Include="CanMessageEvent.cs" />
+    <Compile Include="CanTiming.cs" />
     <None Include="key.snk" />
   </ItemGroup>
   <ItemGroup>