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// license:BSD-3-Clause
// copyright-holders:David Haywood, Luca Elia
/* Serial Flash */
#pragma once
#ifndef __SERFLASH_H__
#define __SERFLASH_H__
#define FLASH_PAGE_SIZE (2048+64)
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_SERFLASH_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, SERFLASH, 0)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class serflash_device;
typedef enum { STATE_IDLE = 0, STATE_READ, STATE_READ_ID, STATE_READ_STATUS, STATE_BLOCK_ERASE, STATE_PAGE_PROGRAM } flash_state_t;
//const char *m_flash_state_name[] = { "IDLE", "READ", "READ_ID", "READ_STATUS", "BLOCK ERASE", "PAGE PROGRAM" };
// custom initialization for default state
typedef device_delegate<void (serflash_device &, void *, size_t)> serflash_init_delegate;
// ======================> serflash_device
class serflash_device : public device_t,
public device_nvram_interface
{
public:
// construction/destruction
serflash_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
DECLARE_READ8_MEMBER( flash_ready_r );
DECLARE_READ8_MEMBER( flash_io_r );
DECLARE_WRITE8_MEMBER( flash_addr_w );
DECLARE_WRITE8_MEMBER( flash_data_w );
DECLARE_WRITE8_MEMBER( flash_cmd_w );
DECLARE_WRITE8_MEMBER( flash_enab_w );
void flash_hard_reset();
DECLARE_READ8_MEMBER(n3d_flash_r);
DECLARE_WRITE8_MEMBER(n3d_flash_cmd_w);
DECLARE_WRITE8_MEMBER(n3d_flash_addr_w);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() 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;
void flash_change_state(flash_state_t state);
// runtime state
size_t m_length;
UINT8* m_region;
flash_state_t m_flash_state;
UINT8 m_flash_enab;
UINT8 m_flash_cmd_seq;
UINT32 m_flash_cmd_prev;
UINT8 m_flash_addr_seq;
UINT8 m_flash_read_seq;
UINT16 m_flash_row, m_flash_col;
int m_flash_page_addr;
UINT16 m_flash_page_index;
std::vector<UINT8> m_flashwritemap;
UINT8 m_last_flash_cmd;
UINT32 m_flash_addr;
UINT8 m_flash_page_data[FLASH_PAGE_SIZE];
};
// device type definition
extern const device_type SERFLASH;
#endif
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