AN3375 datasheet(59/73 Pages) STMICROELECTRONICS

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AN3375

M24LRXX-R Layer

Doc ID 018637 Rev 1

59/73

4.3

M24LRXX-R global functions

4.3.1

M24LRXX_ReadSingleBlock function

This function sends a read single block command to a contactless tag. The protocol

extension of the request flags is forced to ‘1’.

4.3.2

M24LRXX_WriteSingleBlock function

This function sends a Write single block command to a contactless tag. The protocol

extension of the request flags is forced to ‘1’.

Table 90.

M24LRXX_ReadSingleBlock function description

Function description

Prototype

result = int8_t M24LRXX_ReadSingleBlock

(uc8 Flags, uc8 *UID, uc8 *BlockNumber, uc8

AppendCRC, uc8 *CRC16,uint8_t *pResponse );

Input parameter

Flags: request flags

UID: pointer to contactless tag UID

BlockNumber: pointer to block index

AppendCRC: CRC16 management

CRC16: pointer to user CRC16

Output parameter

pResponse: pointer to CR95HF response

Return parameter

RESULTOK: CR95HF returns a succeeded code

ERRORCODE_GENERIC: a parameter value is erroneous or

CR95HF returns an error code

Table 91.

M24LRXX_WriteSingleBlock function description

Function description

Protocol

result = int8_t M24LRXX_WriteSingleBlock

(uc8 Flags, uc8 *UIDin, uc8 *BlockNumber,

uc8 BlockLength,uc8 *DataToWrite,uc8

AppendCRC, uc8 *CRC16,uint8_t *pResponse );

Input parameter

Flags: request flags

UIDin: pointer to contactless tag UID

BlockNumber: pointer to block index

BlockLength: number of byte of a block

DataToWrite: pointer to data to write into contactless tag

memory

AppendCRC: CRC16 management

CRC16: pointer to user CRC16

Output parameter

pResponse: pointer to CR95HF response

Return parameter

ERRORCODE_GENERIC: a parameter value is erroneous or

CR95HF returns an error code

RESULTOK: CR95HF returns a succeeded code

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