arch_avr_spi.h

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/*
 * arch_avr_spi.h
 *
 *  Copyright 2021-2026 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_AVR_SPI_H__
#define __YASIMAVR_AVR_SPI_H__
 
#include "arch_avr_globals.h"
#include "core/sim_interrupt.h"
 
YASIMAVR_BEGIN_NAMESPACE
 
 
//=======================================================================================
struct ArchAVR_SPIConfig {
 
    reg_addr_t reg_data;
 
    regbit_t rb_enable;
    regbit_t rb_int_enable;
    regbit_t rb_int_flag;
    regbit_t rb_mode;
    regbit_t rb_cpol;
    regbit_t rb_cpha;
    regbit_t rb_dord;
    regbit_t rb_clock;
    regbit_t rb_clock2x;
    regbit_t rb_wcol;
 
    int_vect_t iv_spi;
 
};
 
class AVR_ARCHAVR_PUBLIC_API ArchAVR_SPI : public Peripheral {
 
public:
 
    ArchAVR_SPI(uint8_t num, const ArchAVR_SPIConfig& config);
    virtual ~ArchAVR_SPI();
 
    virtual bool init(Device& device) override;
    virtual void reset(int flags) override;
    virtual bool ctlreq(ctlreq_id_t req, ctlreq_data_t* data) override;
    virtual uint8_t ioreg_read_handler(reg_addr_t addr, uint8_t value) override;
    virtual uint8_t ioreg_peek_handler(reg_addr_t addr, uint8_t value) override;
    virtual void ioreg_write_handler(reg_addr_t addr, const ioreg_write_t& data) override;
 
private:
 
    class _PinDriver;
    class _Controller;
 
    const ArchAVR_SPIConfig& m_config;
 
    _Controller* m_ctrl;
 
    InterruptFlag m_intflag;
    bool m_intflag_accessed;
 
    void update_framerate();
    void update_serial_config();
    void frame_completed();
    void host_selected();
 
};
 
 
YASIMAVR_END_NAMESPACE
 
#endif //__YASIMAVR_AVR_SPI_H__