Subversion Repositories altor32

//-----------------------------------------------------------------
//                           AltOR32 
//                Alternative Lightweight OpenRisc 
//                            V2.0
//                     Ultra-Embedded.com
//                   Copyright 2011 - 2013
//
//               Email: admin@ultra-embedded.com
//
//                       License: LGPL
//-----------------------------------------------------------------
//
// Copyright (C) 2011 - 2013 Ultra-Embedded.com
//
// This source file may be used and distributed without         
// restriction provided that this copyright statement is not    
// removed from the file and that any derivative work contains  
// the original copyright notice and the associated disclaimer. 
//
// This source file is free software; you can redistribute it   
// and/or modify it under the terms of the GNU Lesser General   
// Public License as published by the Free Software Foundation; 
// either version 2.1 of the License, or (at your option) any   
// later version.
//
// This source is distributed in the hope that it will be       
// useful, but WITHOUT ANY WARRANTY; without even the implied   
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      
// PURPOSE.  See the GNU Lesser General Public License for more 
// details.
//
// You should have received a copy of the GNU Lesser General    
// Public License along with this source; if not, write to the 
// Free Software Foundation, Inc., 59 Temple Place, Suite 330, 
// Boston, MA  02111-1307  USA
//-----------------------------------------------------------------
#ifndef __PERIPH_TIMER_H__
#define __PERIPH_TIMER_H__
 
#include "peripheral.h"
 
//--------------------------------------------------------------------
// Defines:
//--------------------------------------------------------------------
#define TIMER_BASE          0x12000100
 
//--------------------------------------------------------------------
// Class
//--------------------------------------------------------------------
class TimerPeripheral: public Peripheral
{
    virtual void Reset(void)
    { 
        tick_count = 0;
    }
 
    virtual void Clock(void)
    { 
        static int ticks = 0;
 
        // 1ms tick, 1MHz clock rate...
        if (++ticks == 1000)
        {
            tick_count++;
            ticks = 0;
        }
    }    
 
    virtual TRegister Access(TAddress addr, TRegister data_in, TRegister wr, TRegister rd) 
    { 
        switch (addr)
        {
            case TIMER_BASE:
                return tick_count;
        }
 
        return 0; 
    }
 
    virtual bool Interrupt(void) 
    { 
        return false; 
    }
 
    virtual TAddress GetStartAddress() { return TIMER_BASE; }
    virtual TAddress GetStopAddress()  { return TIMER_BASE; }
private:
 
    TRegister tick_count;
};
 
#endif