AN3985 datasheet(76/105 Pages) STMICROELECTRONICS

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M24LRxx layer

AN3985

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Doc ID 022255 Rev 2

M24LRxx_Get_System_Info function

This function sends, through the CR95HF, a Get System Information command to a

contactless tag in the field.

M24LRxx_Get_Multiple_Blocks_Security_Status function

This function sends, through the CR95HF, a get multiple blocks security status command to

a contactless tag in the field.

Note:

Received data is stored into the internal EEPROM of the MCU.

Table 128.

M24LRxx_Get_System_Info function description

Prototype

u8 M24LRxx_Get_System_Info(ISO15693_Tag* MyTag, const u8

Request_flags,const u8* Tag_UID);

Input parameter

Request_flags: Specifies the actions to be performed by the contactless tag

and whether corresponding fields are present or not. (1) (2)

Tag_UID: pointer on the UID (optional)

The Address flag indicates if Tag_UID field will be added to the command (addressed mode).

If the memory size is larger than 8 kbit, the protocol extension flag of request flags should be set.

Output parameter

MyTag: pointer on the structure that contains the tag response

Return parameter

M24LRxx_ERROR_CODE: The command failed.

M24LRxx_ERROR_PARAMETERS_REQUEST_FLAGS: The inventory flag is

set.

M24LRxx_SUCCESS_CODE: The tag answered the command.

Table 129.

M24LRxx_Get_Multiple_Blocks_Security_Status function description

Prototype

M24LRxx_Get_Multiple_Blocks_Security_Status(ISO15693_Tag*

MyTag, const u8 Request_flags, const u8* Tag_UID, const u16

First_Block_number, const u8 Number_of_Blocks);

Input parameter

Request_flags: Specifies the actions to be performed by the contactless tag

and whether corresponding fields are present or not. (1) (2)

Tag_UID: pointer on the UID (optional)

First_Block_number: address of the first block to read (3)

Number_of_Blocks: number of blocks to read after the first one

The Address flag indicates if Tag_UID field will be added to the command (addressed mode).

If the memory size is more than 8 kbit, the protocol extension flag of request flags should be set.

If the memory size is more than 8 kbit, the block number is composed by two bytes.

Output parameter

MyTag: pointer on the structure that contains the tag response

Return parameter

M24LRxx_ERROR_CODE: The command failed.

M24LRxx_ERROR_PARAMETERS_REQUEST_FLAGS: The inventory flag is

set.

M24LRxx_SUCCESS_CODE: The tag answered the command.

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