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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
eeprom.h
Base class for EEPROM devices.
***************************************************************************/
#pragma once
#ifndef __EEPROM_H__
#define __EEPROM_H__
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_EEPROM_SIZE(_cells, _cellbits) \
eeprom_base_device::static_set_size(*device, _cells, _cellbits);
#define MCFG_EEPROM_DATA(_data, _size) \
eeprom_base_device::static_set_default_data(*device, _data, _size);
#define MCFG_EEPROM_DEFAULT_VALUE(_value) \
eeprom_base_device::static_set_default_value(*device, _value);
#define MCFG_EEPROM_WRITE_TIME(_value) \
eeprom_base_device::static_set_timing(*device, eeprom_base_device::WRITE_TIME, _value);
#define MCFG_EEPROM_WRITE_ALL_TIME(_value) \
eeprom_base_device::static_set_timing(*device, eeprom_base_device::WRITE_ALL_TIME, _value);
#define MCFG_EEPROM_ERASE_TIME(_value) \
eeprom_base_device::static_set_timing(*device, eeprom_base_device::ERASE_TIME, _value);
#define MCFG_EEPROM_ERASE_ALL_TIME(_value) \
eeprom_base_device::static_set_timing(*device, eeprom_base_device::ERASE_ALL_TIME, _value);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> eeprom_base_device
class eeprom_base_device : public device_t,
public device_memory_interface,
public device_nvram_interface
{
protected:
// construction/destruction
eeprom_base_device(const machine_config &mconfig, device_type devtype, const char *name, const char *tag, device_t *owner, const char *shortname, const char *file);
public:
// timing constants
enum timing_type
{
WRITE_TIME, // default = 2ms
WRITE_ALL_TIME, // default = 8ms
ERASE_TIME, // default = 1ms
ERASE_ALL_TIME, // default = 8ms
TIMING_COUNT
};
// inline configuration helpers
static void static_set_size(device_t &device, int cells, int cellbits);
static void static_set_default_data(device_t &device, const UINT8 *data, UINT32 size);
static void static_set_default_data(device_t &device, const UINT16 *data, UINT32 size);
static void static_set_default_value(device_t &device, UINT32 value);
static void static_set_timing(device_t &device, timing_type type, const attotime &duration);
// read/write/erase data
UINT32 read(offs_t address);
void write(offs_t address, UINT32 data);
void write_all(UINT32 data);
void erase(offs_t address);
void erase_all();
// status
bool ready() const { return machine().time() >= m_completion_time; }
protected:
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const override;
virtual void device_start() override;
virtual void device_reset() override;
// device_memory_interface overrides
virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override;
// device_nvram_interface overrides
virtual void nvram_default() override;
virtual void nvram_read(emu_file &file) override;
virtual void nvram_write(emu_file &file) override;
// internal read/write without side-effects
UINT32 internal_read(offs_t address);
void internal_write(offs_t address, UINT32 data);
// configuration state
UINT32 m_cells;
UINT8 m_address_bits;
UINT8 m_data_bits;
address_space_config m_space_config;
generic_ptr m_default_data;
UINT32 m_default_data_size;
UINT32 m_default_value;
bool m_default_value_set;
attotime m_operation_time[TIMING_COUNT];
// live state
attotime m_completion_time;
};
#endif
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