// license:BSD-3-Clause
// copyright-holders:Robbbert
/* ay31015.h
Written for MESS by Robbbert on May 29th, 2008.
*/
#ifndef __AY31015_H_
#define __AY31015_H_
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
enum ay31015_input_pin_t
{
AY31015_SWE = 16, /* -SWE - Pin 16 - Status word enable */
AY31015_RDAV = 18, /* -RDAV - Pin 18 - Reset data available */
AY31015_SI = 20, /* SI - Pin 20 - Serial input */
AY31015_XR = 21, /* XR - Pin 21 - External reset */
AY31015_CS = 34, /* CS - Pin 34 - Control strobe */
AY31015_NP = 35, /* NP - Pin 35 - No parity */
AY31015_TSB = 36, /* TSB - Pin 36 - Number of stop bits */
AY31015_NB1 = 37, /* NB1 - Pin 37 - Number of bits #1 */
AY31015_NB2 = 38, /* NB2 - Pin 38 - Number of bits #2 */
AY31015_EPS = 39 /* EPS - Pin 39 - Odd/Even parity select */
};
enum ay31015_output_pin_t
{
AY31015_PE = 13, /* PE - Pin 13 - Parity error */
AY31015_FE = 14, /* FE - Pin 14 - Framing error */
AY31015_OR = 15, /* OR - Pin 15 - Over-run */
AY31015_DAV = 19, /* DAV - Pin 19 - Data available */
AY31015_TBMT = 22, /* TBMT - Pin 22 - Transmit buffer empty */
AY31015_EOC = 24, /* EOC - Pin 24 - End of character */
AY31015_SO = 25 /* SO - Pin 25 - Serial output */
};
/***************************************************************************
DEVICE INTERFACE
***************************************************************************/
enum state_t
{
IDLE,
START_BIT,
PROCESSING,
PARITY_BIT,
FIRST_STOP_BIT,
SECOND_STOP_BIT,
PREP_TIME
};
ALLOW_SAVE_TYPE(state_t);
class ay31015_device : public device_t
{
public:
ay31015_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
ay31015_device(const machine_config &mconfig, device_type type, std::string name, std::string tag, device_t *owner, UINT32 clock, std::string shortname, std::string source);
~ay31015_device() {}
static void set_tx_clock(device_t &device, double tx_clock) { downcast<ay31015_device &>(device).m_tx_clock = tx_clock; }
static void set_rx_clock(device_t &device, double rx_clock) { downcast<ay31015_device &>(device).m_rx_clock = rx_clock; }
template<class _Object> static devcb_base &set_read_si_callback(device_t &device, _Object object) { return downcast<ay31015_device &>(device).m_read_si_cb.set_callback(object); }
template<class _Object> static devcb_base &set_write_so_callback(device_t &device, _Object object) { return downcast<ay31015_device &>(device).m_write_so_cb.set_callback(object); }
template<class _Object> static devcb_base &set_status_changed_callback(device_t &device, _Object object) { return downcast<ay31015_device &>(device).m_status_changed_cb.set_callback(object); }
/* Set an input pin */
void set_input_pin( ay31015_input_pin_t pin, int data );
/* Get an output pin */
int get_output_pin( ay31015_output_pin_t pin );
/* Set a new transmitter clock (new_clock is in Hz) */
void set_transmitter_clock( double new_clock );
/* Set a new receiver clock (new_clock is in Hz) */
void set_receiver_clock( double new_clock );
/* Reead the received data */
/* The received data is available on RD8-RD1 (pins 5-12) */
UINT8 get_received_data();
/* Set the transmitter buffer */
/* The data to transmit is set on DB1-DB8 (pins 26-33) */
void set_transmit_data( UINT8 data );
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void internal_reset();
// internal state
inline UINT8 get_si();
inline void set_so(int data);
inline int update_status_pin(UINT8 reg_bit, ay31015_output_pin_t pin);
void update_status_pins();
void transfer_control_pins();
inline void update_rx_timer();
inline void update_tx_timer();
TIMER_CALLBACK_MEMBER(rx_process);
TIMER_CALLBACK_MEMBER(tx_process);
int m_pins[41];
UINT8 m_control_reg;
UINT8 m_status_reg;
UINT16 m_second_stop_bit; // 0, 8, 16
UINT16 m_total_pulses; // bits * 16
UINT8 m_internal_sample;
state_t m_rx_state;
UINT8 m_rx_data; // byte being received
UINT8 m_rx_buffer; // received byte waiting to be accepted by computer
UINT8 m_rx_bit_count;
UINT8 m_rx_parity;
UINT16 m_rx_pulses; // total pulses left
double m_rx_clock; /* RCP - pin 17 */
emu_timer *m_rx_timer;
state_t m_tx_state;
UINT8 m_tx_data; // byte being sent
UINT8 m_tx_buffer; // next byte to send
UINT8 m_tx_parity;
UINT16 m_tx_pulses; // total pulses left
double m_tx_clock; /* TCP - pin 40 */
emu_timer *m_tx_timer;
devcb_read8 m_read_si_cb; /* SI - pin 20 - This will be called whenever the SI pin is sampled. Optional */
devcb_write8 m_write_so_cb; /* SO - pin 25 - This will be called whenever data is put on the SO pin. Optional */
devcb_write8 m_status_changed_cb; /* This will be called whenever one of the status pins may have changed. Optional */
};
class ay51013_device : public ay31015_device
{
public:
ay51013_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
protected:
virtual void internal_reset() override;
};
extern const device_type AY31015; // For AY-3-1014A, AY-3-1015(D) and HD6402 variants
extern const device_type AY51013; // For AY-3-1014, AY-5-1013 and AY-6-1013 variants
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_AY31015_TX_CLOCK(_txclk) \
ay31015_device::set_tx_clock(*device, _txclk);
#define MCFG_AY31015_RX_CLOCK(_rxclk) \
ay31015_device::set_rx_clock(*device, _rxclk);
#define MCFG_AY31015_READ_SI_CB(_devcb) \
devcb = &ay31015_device::set_read_si_callback(*device, DEVCB_##_devcb);
#define MCFG_AY31015_WRITE_SO_CB(_devcb) \
devcb = &ay31015_device::set_write_so_callback(*device, DEVCB_##_devcb);
#define MCFG_AY31015_STATUS_CHANGED_CB(_devcb) \
devcb = &ay31015_device::set_status_changed_callback(*device, DEVCB_##_devcb);
#define MCFG_AY51013_TX_CLOCK(_txclk) \
ay51013_device::set_tx_clock(*device, _txclk);
#define MCFG_AY51013_RX_CLOCK(_rxclk) \
ay51013_device::set_rx_clock(*device, _rxclk);
#define MCFG_AY51013_READ_SI_CB(_devcb) \
devcb = &ay51013_device::set_read_si_callback(*device, DEVCB_##_devcb);
#define MCFG_AY51013_WRITE_SO_CB(_devcb) \
devcb = &ay51013_device::set_write_so_callback(*device, DEVCB_##_devcb);
#define MCFG_AY51013_STATUS_CHANGED_CB(_devcb) \
devcb = &ay51013_device::set_status_changed_callback(*device, DEVCB_##_devcb);
#endif