AN3985 datasheet(73/105 Pages) STMICROELECTRONICS

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AN3985

M24LRxx layer

Doc ID 022255 Rev 2

73/105

M24LRxx_Lock_Sector_Password function

This function sends, through the CR95HF, a lock sector password command to a

contactless tag in the field.

M24LRxx_Present_Sector_Password function

This function sends, through the CR95HF, a present sector password command to a

contactless tag in the field.

Table 122.

M24LRxx_Lock_Sector_Password function description

Prototype

u8 M24LRxx_Lock_Sector_Password(ISO15693_Tag* MyTag, u8

Request_flags, const u8* Tag_UID, u16 Sector_Number, u8

Sector_Security_Status) ;

Input parameter

Request_flags: specifies the actions to be performed by the contactless tag and

whether corresponding fields are present or not. (1)

Tag_UID: pointer on the UID (optional)

Sector_Number: one of the block addresses contained into the sector

Sector_Security_Status: defines the read write protection and the number of

the password protecting the sector.

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

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 123.

M24LRxx_Present_Sector_Password function description

Prototype

u8 M24LRxx_Present_Sector_Password(ISO15693_Tag* MyTag,

const u8 Request_flags, const u8* Tag_UID,const u8

Password_Number ,const u8* Password);

Input parameter

Request_flags: specifies the actions to be performed by the contactless tag and

whether corresponding fields are present or not. (1)

Tag_UID: pointer on the UID (optional)

Password_Number: number identifying the password (between 1 and 3)

Password: password to compare

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

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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