105 lines
4.2 KiB
C#
105 lines
4.2 KiB
C#
// LED Demonstration for the GrovePi.
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// This example combines the GrovePi and the Grove LED using the Raspberry Pi and GrovePi.
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// The three slowly increase the brightness to full, and reset to 0.
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// http://www.dexterindustries.com/shop/grovepi-board/
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// http://www.dexterindustries.com/shop/grove-green-led/
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// http://www.dexterindustries.com/shop/grove-blue-led/
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// http://www.dexterindustries.com/shop/grove-white-led/
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// http://www.dexterindustries.com/shop/grove-red-led/
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/*
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1. LED Socket Kit (Blue color) to __D5__(Digital Pin 5)
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2. LED Socket Kit (Red color) to __D6__(Digital Pin 6)
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3. LED Socket Kit (White color) to __D7__(Digital Pin 7)
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*/
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/*
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The MIT License(MIT)
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GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
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Copyright (C) 2016 Dexter Industries
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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using System;
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using Windows.ApplicationModel.Background;
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using System.Threading.Tasks;
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// Add using statements to the GrovePi libraries
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using GrovePi;
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using GrovePi.Sensors;
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namespace LEDTest
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{
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public sealed class StartupTask : IBackgroundTask
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{
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public void Run(IBackgroundTaskInstance taskInstance)
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{
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// Digital Pins 5 and 6 are Pulse Width Modulated (PWM)
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ILed red = DeviceFactory.Build.Led(Pin.DigitalPin5);
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ILed blue = DeviceFactory.Build.Led(Pin.DigitalPin6);
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// Digital port 7 will not PWM. It is purely digital not
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// Pulse Width Modulated (PWM).
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ILed white = DeviceFactory.Build.Led(Pin.DigitalPin7);
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// We will cycle brightness in a while loop. Type is int
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// so we can perform arithmetic on it.
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int brightness = 0;
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// Loop endlessly
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while (true)
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{
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try
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{
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System.Diagnostics.Debug.WriteLine("Brightness: " + brightness.ToString());
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Task.Delay(100).Wait(); // Delay 0.1 second
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// Check the brightness, if it's going to overflow, reset it.
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if (brightness > 250)
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{
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brightness = 0;
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}
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// Increase the brightness by 5 points.
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brightness = brightness + 5;
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// Write the values to the three LEDs.
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// USA! Red, White, and Blue!
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red.AnalogWrite(Convert.ToByte(brightness));
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blue.AnalogWrite(Convert.ToByte(brightness));
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white.AnalogWrite(Convert.ToByte(brightness));
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}
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catch (Exception ex)
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{
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// NOTE: There are frequent exceptions of the following:
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// WinRT information: Unexpected number of bytes was transferred. Expected: '. Actual: '.
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// This appears to be caused by the rapid frequency of writes to the GPIO
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// These are being swallowed here/
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// If you want to see the exceptions uncomment the following:
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// System.Diagnostics.Debug.WriteLine(ex.ToString());
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}
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}
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}
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}
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}
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