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AN3955

ISO/IEC 14443-3 layers

Doc ID 022017 Rev 1

39/68

The ISO14443A_GetUIDsize function returns the UID size of a contactless tag. Table 55

describes the ISO14443A_GetUIDsize function.

Table 55.

ISO14443A_GetUIDsize function description

The ISO14443A_GetUID function returns the UID of a contactless tag. Table 56 describes

the ISO14443A_GetUID function.

Table 56.

ISO14443A_GetUID function description

Prototype

int8_t ISO14443A_GetUIDsize(uint8_t*UIDsize);

Input parameter

None

Output parameter

UIDsize: 2-bit value: 0 for single, 1 for double, 2 for triple and 3 for RFU.

Return parameter

RESULTOK: Function is successful.

ERRORCODE_GENERIC: Function failed.

Prototype

int8_t ISO14443A_GetUID(uint8_t*SAKByte,uint8_t*Nb

UIDByte, uint8_t*UIDout);

Input parameter

None

Output parameter

SAKByte: The last SAK byte received from a contactless tag during a

Select

sequence.

NbUIDByte: Number of bytes of UID

UIDout: The last SAK byte received from a contactless tag during a select

sequence.

Return parameter

RESULTOK: Function is successful. The select sequence is completed.

ERRORCODE_GENERIC: Function failed. An error occured during the

select sequence.

ISO14443A_ERRORCODE_BCC: A BCC byte is incorrect. The received

data from a contactless tag is corrupted.

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