// 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<i2cmem_device &>(device).m_slave_address = address; }
static void set_page_size(device_t &device, int page_size) { downcast<i2cmem_device &>(device).m_page_size = page_size; }
static void set_data_size(device_t &device, int data_size) { downcast<i2cmem_device &>(device).m_data_size = data_size; }
static void set_e0(device_t &device, int e0) { downcast<i2cmem_device &>(device).m_e0 = e0; }
static void set_e1(device_t &device, int e1) { downcast<i2cmem_device &>(device).m_e1 = e1; }
static void set_e2(device_t &device, int e2) { downcast<i2cmem_device &>(device).m_e2 = e2; }
static void set_wc(device_t &device, int wc) { downcast<i2cmem_device &>(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<uint8_t[]> 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<uint8_t> m_page;
int m_page_offset;
};
// device type definition
extern const device_type I2CMEM;
#endif /* __I2CMEM_H__ */