AT24C64 Class Reference

#include <AT24CXX.h>

Inheritance diagram for AT24C64:

Collaboration diagram for AT24C64:

Public Member Functions
	AT24C64 (TWI &twi, uint8_t subaddr=0)
bool	is_ready ()
virtual int	read (void *dst, uint32_t src, size_t count)
virtual int	write (uint32_t dst, const void *src, size_t count)
uint32_t	room ()
uint32_t	alloc (size_t count)
void	free (uint32_t addr)

Public Attributes
const uint16_t	PAGE_MAX
const uint32_t	SIZE

Protected Attributes
const uint16_t	PAGE_MASK
uint32_t	m_addr

Static Protected Attributes
static const uint8_t	RETRY_MAX = 20
static const uint8_t	RETRY_DELAY_MS = 1

Detailed Description

The AT24C64 provides 65,536 bits of serial electrically erasable and programmable read only memory (EEPROM) organized as 8192 words of 8 bits each. 32-Byte page write mode.

See Atmel Product description (Rev. 0336K-SEEPR-7/03), www.atmel.com/images/doc0336.pdf

Definition at line 174 of file AT24CXX.h.

Constructor & Destructor Documentation

AT24C64::AT24C64 ( TWI &  twi, uint8_t  subaddr = 0  )

inline

Definition at line 176 of file AT24CXX.h.

Member Function Documentation

uint32_t Storage::alloc ( size_t  count )

inlineinherited

Allocate block with given number of bytes on storage. Returns storage address if successful otherwise UINT32_MAX.

Parameters

[in]

count

number of bytes.

Returns

address of allocated block, otherwise UINT32_MAX.

Definition at line 53 of file Storage.h.

void Storage::free ( uint32_t  addr )

inlineinherited

Reset allocation point to given address.

Parameters

[in]

addr

address of allocated block.

Definition at line 65 of file Storage.h.

bool AT24CXX::is_ready ( )

inlineinherited

Return true(1) if the device is ready, write cycle is completed, otherwise false(0).

Returns

bool.

Definition at line 62 of file AT24CXX.h.

virtual int AT24CXX::read ( void *  dst, uint32_t  src, size_t  count  )

inlinevirtualinherited

Read eeprom block with the given size into the buffer from the address. Return number of bytes read or negative error code.

Parameters

[in]	dst	buffer to read from eeprom.
[in]	src	address in eeprom to read from.
[in]	count	number of bytes to read.

Returns

number of bytes or negative error code.

Implements Storage.

Definition at line 79 of file AT24CXX.h.

uint32_t Storage::room ( )

inlineinherited

Returns number of bytes that may be allocated.

Returns

number of bytes.

Definition at line 42 of file Storage.h.

virtual int AT24CXX::write ( uint32_t  dst, const void *  src, size_t  count  )

inlinevirtualinherited

Write eeprom block at given address with the contents from the buffer. Return number of bytes written or negative error code.

Parameters

[in]	dst	address in eeprom to read write to.
[in]	src	buffer to write to eeprom.
[in]	count	number of bytes to write.

Returns

number of bytes or negative error code.

Implements Storage.

Definition at line 106 of file AT24CXX.h.

Member Data Documentation

uint32_t Storage::m_addr

protectedinherited

Address of the next allocation.

Definition at line 398 of file Storage.h.

const uint16_t AT24CXX::PAGE_MASK

protectedinherited

Memory addres page mask.

Definition at line 139 of file AT24CXX.h.

const uint16_t AT24CXX::PAGE_MAX

inherited

Number of bytes in max write page size.

Definition at line 55 of file AT24CXX.h.

const uint8_t AT24CXX::RETRY_DELAY_MS = 1

staticprotectedinherited

Retry delay time: 1 ms

Definition at line 145 of file AT24CXX.h.

const uint8_t AT24CXX::RETRY_MAX = 20

staticprotectedinherited

Maximum number of read/write page retries: 20 ms

Definition at line 142 of file AT24CXX.h.

const uint32_t Storage::SIZE

inherited

Number of bytes on device.

Definition at line 30 of file Storage.h.

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The documentation for this class was generated from the following file:

• src/Driver/AT24CXX.h