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/*
* DS2401
*
* Dallas Semiconductor
* Silicon Serial Number
*
*/
#ifndef __DS2401_H__
#define __DS2401_H__
#define MCFG_DS2401_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, DS2401, 0)
#include "emu.h"
class ds2401_device : public device_t
{
public:
// construction/destruction
ds2401_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
DECLARE_WRITE_LINE_MEMBER( write );
DECLARE_READ_LINE_MEMBER( read );
UINT8 direct_read(int index);
protected:
enum {
SIZE_DATA = 8,
COMMAND_READROM = 0x33
};
enum {
STATE_IDLE,
STATE_RESET,
STATE_RESET1,
STATE_RESET2,
STATE_COMMAND,
STATE_READROM
};
enum {
TIMER_MAIN,
TIMER_RESET
};
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
// internal state
int m_state, m_bit, m_shift;
UINT8 m_byte;
bool m_rx, m_tx;
UINT8 m_data[SIZE_DATA];
emu_timer *m_timer_main, *m_timer_reset;
attotime t_samp, t_rdv, t_rstl, t_pdh, t_pdl;
private:
inline void verboselog(int n_level, const char *s_fmt, ...) ATTR_PRINTF(3,4);
};
// device type definition
extern const device_type DS2401;
#endif
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