arch_xt_rtc.h

Go to the documentation of this file.

/*
 * arch_xt_rtc.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_XT_RTC_H__
#define __YASIMAVR_XT_RTC_H__
 
#include "arch_xt_globals.h"
#include "core/sim_peripheral.h"
#include "core/sim_interrupt.h"
#include "ioctrl_common/sim_timer.h"
 
YASIMAVR_BEGIN_NAMESPACE
 
 
//=======================================================================================
 
struct ArchXT_RTCConfig {
 
    enum RTC_ClockSource {
        Clock_32kHz,
        Clock_1kHz
    };
 
    struct clksel_config_t : base_reg_config_t {
        RTC_ClockSource source;
    };
 
    std::vector<clksel_config_t> clocks;
    reg_addr_t reg_base;
    int_vect_t iv_rtc;
    int_vect_t iv_pit;
 
};
 
class AVR_ARCHXT_PUBLIC_API ArchXT_RTC : public Peripheral {
 
public:
 
    explicit ArchXT_RTC(const ArchXT_RTCConfig& config);
    virtual ~ArchXT_RTC();
 
    virtual bool init(Device& device) override;
    virtual void reset(int flags) 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;
    virtual void sleep(bool on, SleepMode mode) override;
 
private:
 
    const ArchXT_RTCConfig& m_config;
 
    int m_clk_mode;
 
    //***** prescaled timer, one for each counter *****
    TimerCounter m_rtc_counter;
    TimerCounter m_pit_counter;
 
    //***** Interrupt flags *****
    InterruptFlag m_rtc_intflag;
    InterruptFlag m_pit_intflag;
 
    //***** Timer signal hook implementation *****
    class TimerHook;
    friend class TimerHook;
    TimerHook* m_timer_hook;
 
    void rtc_hook_raised(const signal_data_t& sigdata);
    void pit_hook_raised(const signal_data_t& sigdata);
 
    void configure_timers();
 
};
 
 
YASIMAVR_END_NAMESPACE
 
#endif //__YASIMAVR_XT_RTC_H__