// license:BSD-3-Clause // copyright-holders:David Haywood, Luca Elia /* Serial Flash */ #ifndef MAME_MACHINE_SERFLASH_H #define MAME_MACHINE_SERFLASH_H #pragma once //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> serflash_device class serflash_device : public device_t, public device_nvram_interface { public: // custom initialization for default state typedef device_delegate init_delegate; // construction/destruction serflash_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock); // configuration void set_flash_page_size(uint16_t size) { m_flash_page_size = size; } uint8_t flash_ready_r(); uint8_t flash_io_r(); void flash_addr_w(uint8_t data); void flash_data_w(uint8_t data); void flash_cmd_w(uint8_t data); void flash_enab_w(uint8_t data); void flash_hard_reset(); uint8_t n3d_flash_r(offs_t offset); void n3d_flash_cmd_w(offs_t offset, uint8_t data); void n3d_flash_addr_w(offs_t offset, uint8_t data); protected: enum class flash_state_t : u8 { IDLE = 0, READ, READ_ID, READ_STATUS, BLOCK_ERASE, PAGE_PROGRAM }; // device-level overrides virtual void device_start() override; virtual void device_reset() override; // device_nvram_interface overrides virtual void nvram_default() override; virtual bool nvram_read(util::read_stream &file) override; virtual bool nvram_write(util::write_stream &file) override; void flash_change_state(flash_state_t state); // runtime state size_t m_length; uint8_t* m_region; uint32_t m_row_num; uint16_t m_flash_page_size; flash_state_t m_flash_state; uint8_t m_flash_enab; uint8_t m_flash_cmd_seq; uint32_t m_flash_cmd_prev; uint8_t m_flash_addr_seq; uint8_t m_flash_read_seq; uint32_t m_flash_row; uint16_t m_flash_col; int m_flash_page_addr; uint32_t m_flash_page_index; std::vector m_flashwritemap; uint8_t m_last_flash_cmd; uint32_t m_flash_addr; std::vector m_flash_page_data; }; // device type definition DECLARE_DEVICE_TYPE(SERFLASH, serflash_device) #endif // MAME_MACHINE_SERFLASH_H