Neal Horman / CardReader

Wiegand card reader driver library

Import libraryCardReader

Wiegand card reader driver library

Last commit 18 Jul 2012 by Neal Horman

This is a Wiegand 2 signal (Data0, Data1) card reader interface library.

Information

Todo - parity checking.

Wiegand technology References

Hobbyist project

Library use example

/*
 *  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.
 */
 
#include "mbed.h"
#include "ReaderWiegand.h"

Serial gSerial(USBTX, USBRX);
ReaderWiegand gReader(p10,p11);

int main()
{
    gSerial.printf("Ready\r\n");
    
    while(1)
    {
        if(gReader.isNew())
        {   uint8_t bq = gReader.bitCount();
            uint64_t bits = gReader.bits();
        
            for(uint8_t i=0; i<bq; i++)
                gSerial.printf("%c",'0' + ( ( bits & ( (uint64_t)1 << i ) ) != 0));
            gSerial.printf(" bq: %u h: 0x%llX ",bq,bits);
            if(gReader.isValid())
                gSerial.printf("f: %lu, c: %lu\r\n",gReader.facility(),gReader.card());
            else
                gSerial.printf("Unknown format\r\n");

            gReader.old();
        }
    }
}

ReaderWiegand.h

Committer:
nkhorman
Date:
2012-07-18
Revision:
0:b468573740b5

File content as of revision 0:b468573740b5:

/*
 *  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