AN3985 datasheet(83/105 Pages) STMICROELECTRONICS

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AN3985

M24LRxx layer

Doc ID 022255 Rev 2

83/105

M24LRxx_SetRst_EH_en function

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

in the field. On receiving the set reset Energy Harvesting Enable command, the M24LRxxE-R

contactless tag set or reset the EHenable bit, within the volatile control register.

M24LRxx_Check_EH_En function

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

in the field. On receiving the Check Energy Harvesting enabled command, the M24LRxxE-R

contactless tag reads the control register and sends back its value.

Table 141.

M24LRxx_SetRst_EH_en function description

Prototype

u8 M24LRxx_SetRst_EH_en (ISO15693_Tag* MyTag,

const u8

Request_flags,const u8* Tag_UID, u8 Set_Reset);

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)

Set_Reset: Enable or disable the energy harvesting. (2)

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

Value to enable the energy harvesting: M24LRxx_CONTROL_BYTE_EH_ENABLE

Value to disable the energy harvesting: M24LRxx_CONTROL_BYTE_EH_DISABLE

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 142.

M24LRxx_Check_EH_En function description

Prototype

u8 M24LRxx_Check_EH_En (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)

Tag_UID: pointer on the UID (optional)

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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