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/***************************************************************************
Fujitsu MB3773
Power Supply Monitor with Watch Dog Timer (i.e. Reset IC)
Todo:
Calculate the timeout from parameters.
2009-06 Converted to be a device
***************************************************************************/
#include "emu.h"
#include "mb3773.h"
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
typedef struct _mb3773_state mb3773_state;
struct _mb3773_state
{
emu_timer *watchdog_timer;
UINT8 ck;
};
/***************************************************************************
INLINE FUNCTIONS
***************************************************************************/
INLINE mb3773_state *get_safe_token(running_device *device)
{
assert(device != NULL);
assert((device->type() == MB3773));
return (mb3773_state *)downcast<legacy_device_base *>(device)->token();
}
/***************************************************************************
IMPLEMENTATION
***************************************************************************/
/*-------------------------------------------------
TIMER_CALLBACK( watchdog_timeout )
-------------------------------------------------*/
static TIMER_CALLBACK( watchdog_timeout )
{
mame_schedule_soft_reset(machine);
}
/*-------------------------------------------------
reset_timer
-------------------------------------------------*/
static void reset_timer( running_device *device )
{
mb3773_state *mb3773 = get_safe_token(device);
timer_adjust_oneshot(mb3773->watchdog_timer, ATTOTIME_IN_SEC( 5 ), 0);
}
/*-------------------------------------------------
mb3773_set_ck
-------------------------------------------------*/
WRITE8_DEVICE_HANDLER( mb3773_set_ck )
{
mb3773_state *mb3773 = get_safe_token(device);
if( data == 0 && mb3773->ck != 0 )
{
reset_timer(device);
}
mb3773->ck = data;
}
/*-------------------------------------------------
DEVICE_START( mb3773 )
-------------------------------------------------*/
static DEVICE_START( mb3773 )
{
mb3773_state *mb3773 = get_safe_token(device);
/* create the timer */
mb3773->watchdog_timer = timer_alloc(device->machine, watchdog_timeout, NULL);
reset_timer(device);
/* register for state saving */
state_save_register_device_item(device, 0, mb3773->ck);
}
/*-------------------------------------------------
DEVICE_RESET( mb3773 )
-------------------------------------------------*/
static DEVICE_RESET( mb3773 )
{
mb3773_state *mb3773 = get_safe_token(device);
mb3773->ck = 0;
}
/*-------------------------------------------------
DEVICE_GET_INFO( mb3773 )
-------------------------------------------------*/
static const char DEVTEMPLATE_SOURCE[] = __FILE__;
#define DEVTEMPLATE_ID(p,s) p##mb3773##s
#define DEVTEMPLATE_FEATURES DT_HAS_START | DT_HAS_RESET
#define DEVTEMPLATE_NAME "Fujistu MB3773"
#define DEVTEMPLATE_FAMILY "Fujistu Power Supply Monitor"
#include "devtempl.h"
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