// license:BSD-3-Clause // copyright-holders:smf /*************************************************************************** i2cmem.h I2C Memory ***************************************************************************/ #pragma once #ifndef __I2CMEM_H__ #define __I2CMEM_H__ /*************************************************************************** CONSTANTS ***************************************************************************/ #define I2CMEM_SLAVE_ADDRESS ( 0xa0 ) #define I2CMEM_SLAVE_ADDRESS_ALT ( 0xb0 ) //************************************************************************** // INTERFACE CONFIGURATION MACROS //************************************************************************** #define MCFG_I2CMEM_ADD( _tag ) \ MCFG_DEVICE_ADD( _tag, I2CMEM, 0 ) #define MCFG_I2CMEM_ADDRESS( address ) \ i2cmem_device::set_address(*device, address); #define MCFG_I2CMEM_PAGE_SIZE( page_size ) \ i2cmem_device::set_page_size(*device, page_size); #define MCFG_I2CMEM_DATA_SIZE(data_size) \ i2cmem_device::set_data_size(*device, data_size); #define MCFG_I2CMEM_E0(e0) \ i2cmem_device::set_e0(*device, e0); #define MCFG_I2CMEM_E1(e1) \ i2cmem_device::set_e1(*device, e1); #define MCFG_I2CMEM_E2(e2) \ i2cmem_device::set_e2(*device, e2); #define MCFG_I2CMEM_WC(wc) \ i2cmem_device::set_wc(*device, wc); #define MCFG_X2404P_ADD( _tag ) \ MCFG_I2CMEM_ADD( _tag ) \ MCFG_I2CMEM_PAGE_SIZE(8) \ MCFG_I2CMEM_DATA_SIZE(0x200) #define MCFG_24C01_ADD( _tag ) \ MCFG_I2CMEM_ADD( _tag ) \ MCFG_I2CMEM_PAGE_SIZE(4) \ MCFG_I2CMEM_DATA_SIZE(0x80) #define MCFG_24C02_ADD( _tag ) \ MCFG_I2CMEM_ADD( _tag ) \ MCFG_I2CMEM_PAGE_SIZE(4) \ MCFG_I2CMEM_DATA_SIZE(0x100) #define MCFG_24C08_ADD( _tag ) \ MCFG_I2CMEM_ADD( _tag ) \ MCFG_I2CMEM_DATA_SIZE(0x400) #define MCFG_24C16_ADD( _tag ) \ MCFG_I2CMEM_ADD( _tag ) \ MCFG_I2CMEM_PAGE_SIZE(8) \ MCFG_I2CMEM_DATA_SIZE(0x800) #define MCFG_24C16A_ADD( _tag ) \ MCFG_I2CMEM_ADD( _tag ) \ MCFG_I2CMEM_DATA_SIZE(0x800) #define MCFG_24C64_ADD( _tag ) \ MCFG_I2CMEM_ADD( _tag ) \ MCFG_I2CMEM_PAGE_SIZE(8) \ MCFG_I2CMEM_DATA_SIZE(0x2000) //************************************************************************** // TYPE DEFINITIONS //************************************************************************** // ======================> i2cmem_device class i2cmem_device : public device_t, public device_nvram_interface { public: // construction/destruction i2cmem_device( const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock ); static void set_address(device_t &device, int address) { downcast(device).m_slave_address = address; } static void set_page_size(device_t &device, int page_size) { downcast(device).m_page_size = page_size; } static void set_data_size(device_t &device, int data_size) { downcast(device).m_data_size = data_size; } static void set_e0(device_t &device, int e0) { downcast(device).m_e0 = e0; } static void set_e1(device_t &device, int e1) { downcast(device).m_e1 = e1; } static void set_e2(device_t &device, int e2) { downcast(device).m_e2 = e2; } static void set_wc(device_t &device, int wc) { downcast(device).m_wc = wc; } // I/O operations DECLARE_WRITE_LINE_MEMBER( write_e0 ); DECLARE_WRITE_LINE_MEMBER( write_e1 ); DECLARE_WRITE_LINE_MEMBER( write_e2 ); DECLARE_WRITE_LINE_MEMBER( write_sda ); DECLARE_WRITE_LINE_MEMBER( write_scl ); DECLARE_WRITE_LINE_MEMBER( write_wc ); DECLARE_READ_LINE_MEMBER( read_sda ); 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; // internal helpers int address_mask(); int select_device(); int data_offset(); optional_memory_region m_region; // internal state std::unique_ptr m_data; int m_slave_address; int m_page_size; int m_data_size; int m_scl; int m_sdaw; int m_e0; int m_e1; int m_e2; int m_wc; int m_sdar; int m_state; int m_bits; int m_shift; int m_devsel; int m_byteaddr; std::vector m_page; int m_page_offset; }; // device type definition extern const device_type I2CMEM; #endif /* __I2CMEM_H__ */