Diff: source/LogicGates.cpp

Revision:

2:5b2cd31ac474

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/LogicGates.cpp	Fri Apr 08 16:59:43 2016 +0100
@@ -0,0 +1,168 @@
+/*
+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_LOGIC_GATES
+
+#define LOGIC_MODE_NOT            1
+#define LOGIC_MODE_AND            2
+#define LOGIC_MODE_OR             3
+#define LOGIC_MODE_OUTPUT         4
+
+#define LOGIC_MODE_MIN            1
+#define LOGIC_MODE_MAX            4
+
+#define TOOL_SELECT_DELAY   1000
+
+MicroBit uBit;
+
+MicroBitImage NOT("\
+        0 0 1 0 0\n\
+        0 0 1 1 0\n\
+        1 1 1 1 1\n\
+        0 0 1 1 0\n\
+        0 0 1 0 0\n"); 
+
+MicroBitImage AND("\
+        0 0 1 1 0\n\
+        1 1 1 1 1\n\
+        0 0 1 1 1\n\
+        1 1 1 1 1\n\
+        0 0 1 1 0\n");
+
+MicroBitImage OR("\
+        0 0 0 1 0\n\
+        1 1 1 1 1\n\
+        0 0 0 1 1\n\
+        1 1 1 1 1\n\
+        0 0 0 1 0\n"); 
+
+MicroBitImage OUTPUT_ON("\
+        0 1 1 1 0\n\
+        1 1 1 1 1\n\
+        1 1 1 1 1\n\
+        1 1 1 1 1\n\
+        0 1 1 1 0\n"); 
+
+MicroBitImage OUTPUT_OFF("\
+        0 1 1 1 0\n\
+        1 0 0 0 1\n\
+        1 0 0 0 1\n\
+        1 0 0 0 1\n\
+        0 1 1 1 0\n"); 
+
+int mode = LOGIC_MODE_NOT;
+
+void onShake(MicroBitEvent)
+{
+    // The micro:bit has been shaken, so move on to the next logic gate.
+    mode++;
+
+    // Wrap back to the start if necessary.
+    if (mode > LOGIC_MODE_MAX)
+        mode = LOGIC_MODE_MIN;
+
+    // Update the display to 
+    switch (mode)
+    {
+        case LOGIC_MODE_NOT:
+            uBit.display.print(NOT);
+            break;
+
+        case LOGIC_MODE_AND:
+            uBit.display.print(AND);
+            break;
+
+        case LOGIC_MODE_OR:
+            uBit.display.print(OR);
+            break;
+
+        case LOGIC_MODE_OUTPUT:
+            uBit.display.print(OUTPUT_OFF);
+            break;
+    }
+}
+
+int main()
+{
+    // Initialise the micro:bit runtime.
+    uBit.init();
+
+    // Register to receive events when the micro:bit is shaken.
+    uBit.messageBus.listen(MICROBIT_ID_GESTURE, MICROBIT_ACCELEROMETER_EVT_SHAKE, onShake);
+
+    // 
+    // Create a simple logic gate simulator, using the P0, P1 and P2 pins.
+    // The micro:bit can then be configured as an NOT / AND / OR gate, by shaking the device.
+    //
+    int output = 0;
+
+    // Our icons are drawn left to right, so rotate the display so the outputs point at the pins on the edge connector. :-)
+    uBit.display.rotateTo(MICROBIT_DISPLAY_ROTATION_270);
+
+    while (1)
+    {        
+        // Check inputs and update outputs accordingly.
+        switch (mode)
+        {
+            int o1;
+            int o2;
+
+            case LOGIC_MODE_NOT:
+                output = uBit.buttonA.isPressed() ? 0 : !uBit.io.P0.getDigitalValue();
+                uBit.display.print(NOT);
+                break;
+                
+            case LOGIC_MODE_AND:
+                o1 = uBit.buttonA.isPressed() || uBit.io.P0.getDigitalValue();
+                o2 = uBit.buttonB.isPressed() || uBit.io.P1.getDigitalValue();
+                output = o1 && o2;
+                break;
+
+            case LOGIC_MODE_OR:
+                output = uBit.buttonA.isPressed() || uBit.io.P0.getDigitalValue() || uBit.buttonB.isPressed() || uBit.io.P1.getDigitalValue();
+                break;
+
+            case LOGIC_MODE_OUTPUT:
+                if (uBit.io.P0.getDigitalValue())
+                    uBit.display.print(OUTPUT_ON);                
+                else
+                    uBit.display.print(OUTPUT_OFF);
+                
+                output = 0;
+                break;
+        }
+        
+        // Update output pin value
+        uBit.io.P2.setDigitalValue(output);
+
+        // Perform a power efficient sleep for a little while. No need to run too quickly!
+        uBit.sleep(1000);
+    }
+}    
+
+#endif
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