AN3985 datasheet(41/105 Pages) STMICROELECTRONICS

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AN3985

ISO/IEC 15693 layer

Doc ID 022255 Rev 2

41/105

ISO15693_Read_Multiple_Block function

This function sends, through the CR95HF, a read multiple block command to the contactless

tag in the field.

Note:

The data received is stored into the internal EEPROM of the MCU.

ISO15693_Write_Multiple_Block function

This function sends, through the CR95HF, a write multiple block command to the contactless

tag in the field or to a unique contactless tag designated by its UID.

Note:

Data to send to the contactless tag is retrieved from the internal MCU EEPROM.

Table 57.

ISO15693_Read_Multiple_Block function description

Prototype

u8 ISO15693_Read_Multiple_Block(ISO15693_Tag* MyTag,

const u8 Request_flags, const u8* Tag_UID, const u8

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).

Tag_UID: pointer on the UID (optional)

First_Block_number: address of the first block to read

Number_of_Blocks: number of blocks to read

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

ISO15693_ERROR_CODE: The command failed.

ISO15693_ERROR_PARAMETERS_REQUEST_FLAGS: There is an error

within the request flags parameters.

ISO15693_SUCCESS_CODE: The contactless tag answered the command.

Table 58.

ISO15693_Write_Multiple_Block function description

Prototype

u8 ISO15693_Write_Multiple_Block(ISO15693_Tag*

MyTag, const u8 Request_flags, const

u8* Tag_UID,

const u8 First_Block_number, const

Number_of_Blocks,const

u8 Block_Length)

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)

First_Block_number: address of the first block to read

Number_of_Blocks: number of blocks to read

Block_Length: number of bytes in a block

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

ISO15693_ERROR_CODE: The command failed.

ISO15693_ERROR_PARAMETERS_REQUEST_FLAGS: There is an error

within the request flags parameters.

ISO15693_SUCCESS_CODE: The contactless tag answered the command.

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