Diff: source/AccelerometerDemo.cpp

Revision:

2:5b2cd31ac474

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/AccelerometerDemo.cpp	Fri Apr 08 16:59:43 2016 +0100
@@ -0,0 +1,74 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2016 British Broadcasting Corporation.
+This software is provided by Lancaster University by arrangement with the BBC.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#include "MicroBit.h"
+#include "MicroBitSamples.h"
+
+#ifdef MICROBIT_SAMPLE_ACCELEROMETER_DEMO
+
+MicroBit uBit;
+
+//
+// Scales the given value that is in the -1024 to 1024 range
+// int a value between 0 and 4.
+//
+int pixel_from_g(int value)
+{
+    int x = 0;
+
+    if (value > -750)
+        x++;
+    if (value > -250)
+        x++;
+    if (value > 250)
+        x++;
+    if (value > 750)
+        x++;
+
+    return x;
+}
+
+int main()
+{
+    // Initialise the micro:bit runtime.
+    uBit.init();
+
+    //
+    // Periodically read the accelerometer x and y values, and plot a 
+    // scaled version of this ont the display. 
+    //
+    while(1)
+    {
+        int x = pixel_from_g(uBit.accelerometer.getX());
+        int y = pixel_from_g(uBit.accelerometer.getY());
+
+        uBit.display.image.clear();
+        uBit.display.image.setPixelValue(x, y, 255);
+        
+        uBit.sleep(100);
+    }
+}
+
+#endif
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