Diff: RPG.cpp

Revision:

0:4a7e5f6a59a4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RPG.cpp	Fri Oct 12 14:01:48 2012 +0000
@@ -0,0 +1,83 @@
+/**
+* =============================================================================
+* Rotary Pulse Generator class (Version 0.0.1)
+* =============================================================================
+* Copyright (c) 2012 Christopher Anderson
+*
+* 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 "RPG.h"
+#include "mbed.h"
+
+/**
+ * Constructor(Channel A input pin, Channel B input pin, Pushbutton input pin)
+ */
+RPG::RPG(PinName pA, PinName pB, PinName pPB)
+    : chRPG(pA, pB), PB(pPB)
+    {
+        chRPG.input();
+        chRPG.mode(PullUp);
+        PB.mode(PullUp);
+        wait_us(10);
+        RPGO = chRPG;
+    }
+    
+/**
+ *Destructor
+ */
+RPG::~RPG()
+{}
+
+/**
+ *reads and debounces push button returns bool result
+ */
+bool RPG::pb()
+{
+    int check = PB;
+    wait_us(5);
+    if((!check) && !PB)
+    {
+        return true;
+    }
+    else return false;
+}
+
+/**
+ *Determines direction of rotation returns:
+ *1 for clockwise
+ *-1 for counter-clockwise
+ *0 for no rotation
+ */
+int RPG::dir()
+{
+    int dir = 0;
+    RPGO = chRPG;
+    wait(.005);
+    RPGN = chRPG;
+    if(RPGN != RPGO)
+    {
+        if((RPGN & 1) != (RPGO >> 1)) dir = 1;
+        else dir = -1;
+    }
+    else dir = 0;
+    RPGO = RPGN;
+    return dir;
+}
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