// license:BSD-3-Clause // copyright-holders:Tim Schuerewegen /********************************************************************* Philips PCF8593 CMOS clock/calendar circuit (c) 2001-2007 Tim Schuerewegen *********************************************************************/ #ifndef MAME_MACHINE_PCF8593_H #define MAME_MACHINE_PCF8593_H #pragma once #include "dirtc.h" // ======================> pcf8593_device class pcf8593_device : public device_t, public device_rtc_interface, public device_nvram_interface { public: pcf8593_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); void scl_w(int state); void sda_w(int state); int sda_r(); protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; // device_rtc_interface overrides virtual bool rtc_feature_y2k() const override { return true; } virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second) override; // device_nvram_interface overrides virtual void nvram_default() override; virtual bool nvram_read(util::read_stream &file) override; virtual bool nvram_write(util::write_stream &file) override; TIMER_CALLBACK_MEMBER(clock_tick); private: void clear_buffer_rx(); // internal state uint8_t m_data[16]; int m_pin_scl; int m_pin_sda; int m_inp; int m_active; int m_bits; uint8_t m_data_recv_index; uint8_t m_data_recv[50]; uint8_t m_mode; uint8_t m_pos; emu_timer * m_timer; enum { RTC_MODE_NONE, RTC_MODE_SEND, RTC_MODE_RECV }; }; // device type definition DECLARE_DEVICE_TYPE(PCF8593, pcf8593_device) #endif // MAME_MACHINE_PCF8593_H