// license:BSD-3-Clause // copyright-holders:Sandro Ronco /**************************************************************************** pce220_ser.h Sharp PC-E220/PC-G850V Serial I/O ****************************************************************************/ #ifndef __PCE220_SER_H__ #define __PCE220_SER_H__ /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ // ======================> pce220_serial_device class pce220_serial_device : public device_t, public device_image_interface { public: // construction/destruction pce220_serial_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); virtual ~pce220_serial_device(); // image-level overrides virtual bool call_load(); virtual void call_unload(); virtual bool call_create(int format_type, option_resolution *format_options); virtual iodevice_t image_type() const { return IO_SERIAL; } virtual bool is_readable() const { return 1; } virtual bool is_writeable() const { return 1; } virtual bool is_creatable() const { return 1; } virtual bool must_be_loaded() const { return 0; } virtual bool is_reset_on_load() const { return 0; } virtual const char *image_interface() const { return nullptr; } virtual const char *file_extensions() const { return "txt,ihx"; } virtual const option_guide *create_option_guide() const { return nullptr; } // specific implementation UINT8 in_xin(void) { return m_xin & 0x01; } UINT8 in_din(void) { return m_din & 0x01; } UINT8 in_ack(void) { return m_ack & 0x01; } void out_busy(UINT8 state) { m_busy = state & 0x01; } void out_dout(UINT8 state) { m_dout = state & 0x01; } void out_xout(UINT8 state) { m_xout = state & 0x01; } void enable_interface(UINT8 state) { m_enabled = state & 0x01; } protected: // internal helpers int calc_parity(UINT8 data); int get_next_state(); // device-level overrides virtual void device_start(); virtual void device_reset(); virtual void device_config_complete(); virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); private: // internal device state static const device_timer_id TIMER_SEND = 0; static const device_timer_id TIMER_RECEIVE = 1; emu_timer* m_send_timer; // timer for send data emu_timer* m_receive_timer; // timer for receive data UINT8 m_state; // transfer status UINT32 m_bytes_count; // number of bytes transferred UINT8 m_current_byte; // byte in transfer UINT8 m_enabled; // enable/disable UINT8 m_busy; // CTS UINT8 m_dout; // DTR UINT8 m_xout; // TXD UINT8 m_xin; // RXD UINT8 m_din; // DSR UINT8 m_ack; // RTS }; // device type definition extern const device_type PCE220SERIAL; /*************************************************************************** DEVICE CONFIGURATION MACROS ***************************************************************************/ #define PCE220SERIAL_TAG "serial" #define MCFG_PCE220_SERIAL_ADD(_tag) \ MCFG_DEVICE_ADD(_tag, PCE220SERIAL, 0) #endif /* __PCE220_SER_H__ */