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AN3955

ISO/IEC 14443-3 layers

Doc ID 022017 Rev 1

45/68

5.2.9

ISO/IEC 14443-3 Type B Split function

The ISO14443B_SplitATQB function splits the ATQB contactless tag response. Table 69

describes the ISO14443B_SplitATQB contactless response.

The ISO14443B_SplitApplicationDataField function splits the ApplicationData

field. The application data field is a part of ATQB response. Table 70 describes the

ISO14443B_SplitApplicationDataField

function.

Table 70.

ISO14443B_SplitApplicationDataField function description

Table 69.

ISO14443B_SplitATQB function description

Prototype

int8_t ISO14443B_SplitATQB

(uint8_t*ReaderResponse, uint8_t*PUOIindex,

uint8_t*ApplicationDataindex,

uint8_t*ProtocolInfoindex);

Input parameter

ReaderResponse: Pointer on CR95HF response

Output parameter

PUPIindex: Index of PUPI field (4bytes)

ApplicationDataindex: Index of ApplicatioData field (4bytes)

ProtocolInfoindex: Index of Protocol field (3 or 4 bytes

depending on Extended ATQB supported bit.) Refer to Table 64:

ISO14443B_REQB function description.

Return parameter

RESULTOK: Function is successful.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns

an error code.

Prototype

int8_t ISO14443B_SplitApplicationDataField(

uc8_t*ApplicationDataField, uint8_t*AFlout,

uint8_t*CRC_BAIDoutIndex,

uint8_t*ProtocolInfoindex);

Input parameter

ApplicationDataField: Application Data field (part of ATQB

response, 4 bytes)

Output parameter

AFlout: AFI byte

CRC_BAIDoutIndex: Index of CRC field (2 bytes)

NumberOfApplication: Number of application byte

Return parameter

RESULTOK: Function is successful.

CR95HF_ERROR_CODE: Function failed. The CR95HF returns

an error code.

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