Library use example

Revision 0:b468573740b5, committed 2012-07-18

Comitter:

nkhorman

Date:

Wed Jul 18 01:54:58 2012 +0000

Commit message:

Add copyright and licensing.; Move to library.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Reader.h	Wed Jul 18 01:54:58 2012 +0000
@@ -0,0 +1,126 @@
+/*
+ *  Card / Proximity reader driver library
+ *  Copyright (c) 2012 Neal Horman - http://www.wanlink.com
+ *  
+ *  License: MIT open source (http://opensource.org/licenses/MIT)
+ *      Summary;
+ *      Use / modify / distribute / publish it how you want and 
+ *      if you use it, or don't, you can't hold me liable for how
+ *      it does or doesn't work.
+ *      If it doesn't work how you want, don't use it, or change
+ *      it so that it does work.
+ */
+
+#ifndef _READER_H_
+#define _READER_H_
+
+class Reader
+{
+public:
+    Reader()
+        : mCard(0)
+        , mFacility(0)
+        , mSite(0)
+        , mBits(0)
+        , mBitsCount(0)
+        , mbIsValid(false)
+        , mbIsNew(false)
+        , mbInhibited(false)
+        {};
+    
+    uint32_t card() { return mCard; };
+    uint32_t facility() { return mFacility; };
+    uint16_t site() { return mSite; };
+    bool isValid() { return mbIsValid; };
+    bool isNew() { return mbIsNew; };
+    void old() { mbIsNew = false; };
+    
+    bool isInhibited() { return mbInhibited; };
+    void inhibit(bool bInhibit = true) { mbInhibited = bInhibit; };
+    
+    uint64_t bits() { return mLastBits; };
+    uint8_t bitCount() { return mLastBitsCount; };
+
+protected:
+    volatile uint32_t mCard;
+    volatile uint32_t mFacility;
+    volatile uint16_t mSite;
+    volatile uint64_t mLastBits;
+    volatile uint8_t mLastBitsCount;
+    
+    volatile uint64_t mBits;
+    volatile uint8_t mBitsCount;
+    
+    volatile bool mbIsValid;
+    volatile bool mbIsNew;
+    
+    bool mbInhibited;
+
+    void shiftIn(uint8_t bit)
+    {
+        if(bit)
+            mBits |= ((uint64_t)1 << mBitsCount);
+        mBitsCount ++;
+    }
+    
+    uint32_t bits32(uint8_t first, uint8_t qty)
+    {   uint32_t val = 0;
+        uint8_t last = first + qty;
+    
+        for(uint8_t i=first; i<last; i++)
+        {
+            if(val)
+                val <<= 1;
+            if(mBits & (1<<i))
+                val |= 1;
+        }
+        
+        return val;
+    }
+    
+    virtual bool decode()
+    {   bool bIsValid = false;
+        
+        mSite = 0;
+        if(mBitsCount == 26)
+        {
+            mFacility = bits32(1,8);
+            mCard = bits32(9,16);
+            bIsValid = true;
+        }
+        else if(mBitsCount == 34)
+        {
+            mFacility = bits32(1,16);
+            mCard = bits32(17,16);
+            bIsValid = true;
+        }
+        else if(mBitsCount == 35)
+        {
+            mFacility = bits32(2,12);
+            mCard = bits32(14,20);
+            bIsValid = true;
+        }
+        else
+        {
+            mFacility = 0;
+            mCard = 0;
+        }
+        
+        mLastBits = mBits;
+        mLastBitsCount = mBitsCount;
+        
+        return bIsValid;
+    }
+    
+    void swiped()
+    {
+        // decode mBits into mCard, mFacility, and mSite
+        mbIsValid = !mbInhibited && decode();
+        // reset mBits and mBitsCount for next operation
+        mBits = 0;
+        mBitsCount = 0;
+        mbIsNew = !mbInhibited;
+    };
+};
+
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ReaderWiegand.h	Wed Jul 18 01:54:58 2012 +0000
@@ -0,0 +1,46 @@
+/*
+ *  Wiegand card reader driver library
+ *  Copyright (c) 2012 Neal Horman - http://www.wanlink.com
+ *  
+ *  License: MIT open source (http://opensource.org/licenses/MIT)
+ *      Summary;
+ *      Use / modify / distribute / publish it how you want and 
+ *      if you use it, or don't, you can't hold me liable for how
+ *      it does or doesn't work.
+ *      If it doesn't work how you want, don't use it, or change
+ *      it so that it does work.
+ */
+ 
+ 
+#ifndef _READERWIEGAND_H_
+#define _READERWIEGAND_H_
+
+#include "Reader.h"
+
+// Use interupt driven inputs to gather the card data
+class ReaderWiegand : public Reader
+{
+public:
+    ReaderWiegand(PinName data0, PinName data1) : Reader(), mData0Irq(data0), mData1Irq(data1)
+    {
+        mData0Irq.mode(PullUp);
+        mData1Irq.mode(PullUp);
+        mData0Irq.fall(this,&ReaderWiegand::data0Fall);
+        mData1Irq.fall(this,&ReaderWiegand::data1Fall);
+        mData0Irq.rise(this,&ReaderWiegand::data01Rise);
+        mData1Irq.rise(this,&ReaderWiegand::data01Rise);
+    };
+protected:
+    InterruptIn mData0Irq;
+    InterruptIn mData1Irq;
+    Timeout mTimer;
+    void swiped() { Reader::swiped(); };
+    
+    void timerRestart() { mTimer.detach(); mTimer.attach_us(this,&ReaderWiegand::swiped,50*1000); };
+    
+    void data0Fall() { shiftIn(0); timerRestart(); };
+    void data1Fall() { shiftIn(1); timerRestart(); };
+    void data01Rise() { timerRestart(); };
+};
+
+#endif
\ No newline at end of file