// 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_t clock); virtual ~pce220_serial_device(); // image-level overrides virtual image_init_result call_load() override; virtual void call_unload() override; virtual image_init_result call_create(int format_type, util::option_resolution *format_options) override; virtual iodevice_t image_type() const override { return IO_SERIAL; } virtual bool is_readable() const override { return 1; } virtual bool is_writeable() const override { return 1; } virtual bool is_creatable() const override { return 1; } virtual bool must_be_loaded() const override { return 0; } virtual bool is_reset_on_load() const override { return 0; } virtual const char *file_extensions() const override { return "txt,ihx"; } // specific implementation uint8_t in_xin(void) { return m_xin & 0x01; } uint8_t in_din(void) { return m_din & 0x01; } uint8_t in_ack(void) { return m_ack & 0x01; } void out_busy(uint8_t state) { m_busy = state & 0x01; } void out_dout(uint8_t state) { m_dout = state & 0x01; } void out_xout(uint8_t state) { m_xout = state & 0x01; } void enable_interface(uint8_t state) { m_enabled = state & 0x01; } protected: // internal helpers int calc_parity(uint8_t data); int get_next_state(); // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_config_complete() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; 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_t m_state; // transfer status uint32_t m_bytes_count; // number of bytes transferred uint8_t m_current_byte; // byte in transfer uint8_t m_enabled; // enable/disable uint8_t m_busy; // CTS uint8_t m_dout; // DTR uint8_t m_xout; // TXD uint8_t m_xin; // RXD uint8_t m_din; // DSR uint8_t 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__ */