AT24CXX.hh

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#ifndef COSA_AT24CXX_HH
#define COSA_AT24CXX_HH

#include "Cosa/Types.h"
#include "Cosa/TWI.hh"
#include "Cosa/EEPROM.hh"

class AT24CXX : private TWI::Driver, public EEPROM::Device {
public:
  const size_t SIZE;

  const uint16_t PAGE_MAX;

  AT24CXX(uint8_t subaddr = 0,
          const size_t size = 32,
          const uint16_t page_max = 32) :
    TWI::Driver(0x50 | (subaddr & 0x07)),
    EEPROM::Device(),
    SIZE((size / CHARBITS) * 1024),
    PAGE_MAX(page_max),
    WRITE_MAX(page_max),
    WRITE_MASK(page_max - 1)
  {}

  virtual bool is_ready();

  virtual int read(void* dest, const void* src, size_t size);

  virtual int write(void* dest, const void* src, size_t size);

private:
  static const uint8_t POLL_MAX = 3;
  const uint16_t WRITE_MAX;
  const uint16_t WRITE_MASK;

  bool poll(const void* addr, const void* buf = NULL, size_t size = 0);
};

class AT24C32 : public AT24CXX {
public:
  AT24C32(uint8_t addr = 0) : AT24CXX(addr, 32, 32) {}
};

class AT24C64 : public AT24CXX {
public:
  AT24C64(uint8_t addr = 0) : AT24CXX(addr, 64, 32) {}
};

class AT24C128 : public AT24CXX {
public:
  AT24C128(uint8_t addr = 0) : AT24CXX(addr, 128, 64) {}
};

class AT24C256 : public AT24CXX {
public:
  AT24C256(uint8_t addr = 0) : AT24CXX(addr, 256, 64) {}
};

class AT24C512 : public AT24CXX {
public:
  AT24C512(uint8_t addr = 0) : AT24CXX(addr, 512, 128) {}
};
#endif