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AN3375

ISO15693 library (intermediate layer)

Doc ID 018637 Rev 1

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3.5.9

ISO15693_IsATagInTheField function

This function returns RESULTOK if at least one contactless tag is present in RF field.

3.5.10

ISO15693_IsTagErrorCode function

This function returns RESULTOK if error flag is set, ERRORCODE_GENERIC otherwise

3.6

Extract flag from request flags functions

These functions return a bit extracted from the request flags (a byte). For more information,

refer to ISO15693 specification and to M24LRXX-R datasheets.

Table 50.

ISO15693_IsATagInTheField function description

Function description

Prototype

result = int8_t

ISO15693_IsATagInTheField(uc8

*pTagReply);

Input parameter

pTagReply: pointer to contactless tag response

Output parameter

none

Return parameter

RESULTOK: a contactless tag is present in the RF field

ERRORCODE_GENERIC: no contactless tag detected

Table 51.

ISO15693_IsTagErrorCode function description

Function description

Prototype

result =

uint8_t ISO15693_IsTagErrorCode

(uc8 Flag);

Input parameter

Flag: response flags

Output parameter

none

Return parameter

RESULTOK: no error

ERRORCODE_GENERIC: error detected

Table 52.

Description of request flags 1 to 4

Bit No

Flag

Bit 1

Subcarrier_flag

Bit 2

Data_rate_flag

Bit 3

Inventory_flag

Bit 4

Protocol_extension_flag

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