File content as of revision 0:cf4dd04052e3:

/*
* mbed AR1020 library
* Copyright (c) 2010 Hendrik Lipka
*
* 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.
*/

#ifndef __AR1020_H_
#define __AR1020_H_

#include "mbed.h"
    
#include "touchpanel.h"
#include "touchevent.h"
    
class AR1020: public TouchPanel
{
    public:
        /**
            requires
                SPI mode=1 (POL=0, PHA=1 [falling edge])
                SPI frequency lower than 900 kHz (something about 100kHz preferred)
            @param spi the SPI object where the AR1020 is connected
            @params enable the pin name where /CS is connected
        */
        AR1020(SPI *spi, PinName enable, PinName sqi, bool swapX=false, bool swapY=false, bool swapXY=false);
        AR1020(PinName mosi, PinName miso, PinName clk, PinName enable, PinName sqi, bool swapX=false, bool swapY=false, bool swapXY=false);
        ~AR1020();
        virtual void init();
        virtual int x();
        virtual int y();
        virtual int pen();
        virtual void read();
        void calibrate();
    private:
        int cmd(char cmd,char* data, int len);
        int readCalibResponse();
        int readByte();
        void writeByte(char byte);

        SPI *_spi;
        DigitalOut *_enable;   
        InterruptIn *_irq;
        DigitalIn *_sqi;
        int _x, _y, _pen; 
        
        DigitalOut *_led;
    
        DigitalOut *_mosi;
        DigitalIn *_miso;
        DigitalOut *_clk;
        
        bool _oldPen;
        TouchEvent _event;
};



#endif