AN3985 datasheet(46/105 Pages) STMICROELECTRONICS

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ISO/IEC 15693 layer

AN3985

46/105

Doc ID 022255 Rev 2

ISO15693_Custom_Commands function

This function sends, through the CR95HF, a custom command to the contactless tag in the

field or to an unique contactless tag designated by its UID. The user should add in

parameters all the data needed. Command size is limited to MAX_DATASENT_LENGTH.

ISO15693_SendEOF function

This function sends through the CR95HF an EOF pulse. This is used for Write Lock and

Inventory 16 slots commands to inform the contactless tag that it can answer now (Write

and Lock commands) or that a new slot is beginning (inventory 16 slots).

Table 67.

ISO15693_Custom_Commands function description

Prototype

u8 ISO15693_Custom_Commands(ISO15693_Tag* MyTag,

const u8 Request_flags, const u8 Custom, u8

IC_Mfg_Code, const u8 Parameters_Length, const u8*

Parameters)

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)

Custom: the custom command code

IC_Mfg_Code: the IC manufacturer code designating the manufacturer of the

contactless tag

Parameters_Length: length of parameters

Parameters: data to write

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 CR95HF 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 68.

ISO15693_SendEOF function description

Prototype

u8 ISO15693_SendEOF(CR95HF_ResponseReceiving*

Response);

Input parameter

None

Output parameter

pResponse: pointer to the CR95HF 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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