arch_xt_timer_b.h

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/*
 * arch_xt_timer_b.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_TIMER_B_H__
#define __YASIMAVR_XT_TIMER_B_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
 
 
//=======================================================================================
 
#define AVR_CTLREQ_TCB_GET_EVENT_HOOK         (AVR_CTLREQ_BASE + 1)
 
struct ArchXT_TimerBConfig {
 
    enum Options {
        EventCount   = 0x01,
        OverflowFlag = 0x02,
    };
 
    reg_addr_t reg_base;
    int_vect_t iv_capt = AVR_INTERRUPT_NONE;
    int options = 0x00;
 
};
 
class AVR_ARCHXT_PUBLIC_API ArchXT_TimerB : public Peripheral {
 
public:
 
    enum SignalId {
        Signal_Capture,
        Signal_Output,
    };
 
    enum CaptureHookTag {
        Tag_Event,
        Tag_Count,
    };
 
    ArchXT_TimerB(int num, const ArchXT_TimerBConfig& config);
    virtual ~ArchXT_TimerB();
 
    //Override of Peripheral callbacks
    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;
    virtual void sleep(bool on, SleepMode mode) override;
 
private:
 
    class _PinDriver;
    friend class _PinDriver;
 
    enum State {
        State_Ready,
        State_Run,
        State_End
    };
 
    const ArchXT_TimerBConfig& m_config;
 
    int m_clk_mode;
    int m_cnt_mode;
    State m_cnt_state;
    uint16_t m_ccmp;
    bool m_event_state;
    uint8_t m_output;
 
    //***** Interrupt flag management *****
    InterruptFlag m_intflag;
 
    //***** Timer management *****
    TimerCounter m_counter;
    BoundFunctionSignalHook<ArchXT_TimerB> m_counter_hook;
 
    BoundFunctionSignalHook<ArchXT_TimerB> m_event_hook;
 
    DataSignal m_signal;
 
    _PinDriver* m_pin_driver;
 
    void set_counter_state(State state);
    void counter_raised(const signal_data_t& sigdata, int hooktag);
    void update_counter_top();
    void update_on_CCMP_read();
    void process_capture_event(unsigned char event_state);
    void event_hook_raised(const signal_data_t& data, int hooktag);
    void process_count_event();
    void raise_capture_flag();
    void update_output(int change);
 
};
 
 
YASIMAVR_END_NAMESPACE
 
#endif //__YASIMAVR_XT_TIMER_B_H__