sim_vref.h

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/*
 * sim_vref.h
 *
 *  Copyright 2021-2024 Clement Savergne <csavergne@yahoo.com>
 
    This file is part of yasim-avr.
 
    yasim-avr is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    yasim-avr 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 General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with yasim-avr.  If not, see <http://www.gnu.org/licenses/>.
 */
 
//=======================================================================================
 
#ifndef __YASIMAVR_VREF_H__
#define __YASIMAVR_VREF_H__
 
#include "../core/sim_peripheral.h"
#include "../core/sim_types.h"
 
YASIMAVR_BEGIN_NAMESPACE
 
 
//=======================================================================================
#define AVR_CTLREQ_VREF_GET             (AVR_CTLREQ_BASE + 1)
 
#define AVR_CTLREQ_VREF_SET             (AVR_CTLREQ_BASE + 2)
 
 
 
//=======================================================================================
class AVR_CORE_PUBLIC_API VREF : public Peripheral {
 
public:
 
    enum Source {
        Source_VCC,             
        Source_AVCC,            
        Source_AREF,            
        Source_Internal,        
    };
 
    enum SignalId {
        Signal_ARefChange,
        Signal_IntRefChange,
        Signal_VCCChange,
    };
 
    explicit VREF(unsigned int ref_count);
 
    bool active() const;
 
    virtual bool ctlreq(ctlreq_id_t req, ctlreq_data_t* data) override;
 
protected:
 
    void set_reference(unsigned int index, Source source, double voltage=1.0);
    double reference(unsigned int index) const;
 
private:
 
    double m_vcc;
    double m_aref;
    DataSignal m_signal;
 
    struct ref_t {
        double value;
        bool relative;
    };
 
    std::vector<ref_t> m_references;
 
};
 
inline bool VREF::active() const
{
    return m_vcc;
}
 
 
YASIMAVR_END_NAMESPACE
 
#endif //__YASIMAVR_VREF_H__