/usr/include/gpsim/i2c-ee.h is in gpsim-dev 0.27.0-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 1998-2003 Scott Dattalo
2003 Mike Durian
2006 Roy R Rankin
This file is part of the libgpsim library of gpsim
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see
<http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
#ifndef I2C_EE_H
#define I2C_EE_H
#include "trigger.h"
#include "gpsim_classes.h"
#include "value.h"
class Register;
class RegisterCollection;
class pic_processor;
class I2C_EE;
class I2C_EE_SCL;
class I2C_EE_SDA;
class Stimulus_Node;
//------------------------------------------------------------------------
//------------------------------------------------------------------------
class PromAddress : public Value
{
public:
PromAddress(I2C_EE *eeprom, const char *_name, const char * desc);
void get(I2C_EE *&eeprom) { eeprom = m_eeprom;}
void get(char *buffer, int buf_size);
private:
I2C_EE *m_eeprom;
};
class I2C_EE : public TriggerObject
{
public:
I2C_EE(Processor *pCpu,
unsigned int _rom_size, unsigned int _write_page_size = 1,
unsigned int _addr_bytes = 1, unsigned int _CSmask = 0,
unsigned int _BSmask = 0, unsigned int _BSshift = 0
);
virtual ~I2C_EE();
void reset(RESET_TYPE);
void debug();
virtual void callback();
virtual void callback_print();
virtual void start_write();
virtual void write_busy();
virtual void write_is_complete();
virtual Register *get_register(unsigned int address);
inline int register_size() {return rom_data_size; }
inline void set_register_size(int bytes) { rom_data_size = bytes; }
virtual void new_scl_edge ( bool direction );
virtual void new_sda_edge ( bool direction );
virtual void attach ( Stimulus_Node *_scl, Stimulus_Node *_sda );
virtual void set_chipselect(unsigned int _chipselect);
inline virtual unsigned int get_rom_size() { return (rom_size); }
// XXX might want to make get_rom a friend only to cli_dump
inline virtual Register **get_rom() { return (rom); }
void dump();
I2C_EE_SCL * scl; // I2C clock
I2C_EE_SDA * sda; // I2C data
protected:
bool shift_read_bit ( bool x );
bool shift_write_bit ();
virtual bool processCommand(unsigned int cmd);
Register **rom; // The data area.
RegisterCollection *m_UiAccessOfRom; // User access to the rom.
unsigned int rom_size;
int rom_data_size; // width of data in bytes
unsigned int xfr_addr,xfr_data; // latched adr and data from I2C.
unsigned int write_page_off; // offset into current write page
unsigned int write_page_size; // max number of writes in one block
unsigned int bit_count; // Current bit number for either Tx or Rx
unsigned int m_command; // Most recent command received from I2C host
unsigned int m_chipselect; // Chip select bits, A0 = bit 1, A1 = bit 2, A2 = bit 3
unsigned int m_CSmask; // Which chip select bits in command are active
unsigned int m_BSmask; // Which block select bits are active in command
unsigned int m_BSshift; // right shift for block select bits
unsigned int m_addr_bytes; // number of address bytes in write command
unsigned int m_addr_cnt; // # 0f address bytes yet to get
bool m_write_protect; // chip is write protected
bool ee_busy; // true if a write is in progress.
bool nxtbit;
enum {
IDLE=0,
START,
RX_CMD,
ACK_CMD,
RX_ADDR,
RX_ADDR2,
ACK_ADDR,
RX_DATA,
ACK_WR,
WRPEND,
ACK_RD,
TX_DATA
} bus_state;
private:
// Is this even used?
virtual void change_rom(unsigned int offset, unsigned int val);
};
#endif /* I2C_EE_H */
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