iso14l4.h File Reference

This command group implements the low-level ISO 14443-4 commands according to the ISO 14443-4 standard. More...

#include "../typedefs.h"

Go to the source code of this file.

Data Structures
struct	brp_Iso14L4_SetupAPDU_t
struct	brp_Iso14L4_ExchangeAPDU_t
struct	brp_Iso14L4_Deselect_t

Macros
#define	BRP_Iso14L4_ErrNoTag   BRP_ERR_STATUS(0x1600, 0x01)
	No card in field of antenna or card in field of antenna does not match given VHL-file. More...
#define	BRP_Iso14L4_ErrHf   BRP_ERR_STATUS(0x1600, 0x04)
	General HF error. More...
#define	BRP_Iso14L4_ErrCard   BRP_ERR_STATUS(0x1600, 0x05)
	PICC corrupt or behaves unspecified. More...
#define	BRP_Iso14L4_ErrCom   BRP_ERR_STATUS(0x1600, 0x10)
	Error in communication to reader chip. More...
#define	BRP_Iso14L4_ErrCmd   BRP_ERR_STATUS(0x1600, 0x23)
	Command and/or parameters invalid. More...

Functions
brp_errcode	brp_Iso14L4_SetupAPDU (brp_Iso14L4_SetupAPDU_t params)
	Setup communication parameters and select a certain PICC for APDU exchange. More...
brp_errcode	brp_Iso14L4_ExchangeAPDU (brp_Iso14L4_ExchangeAPDU_t params)
	This command allows to transmit/receive Application Protocol Data Units (APDUs) according to the ISO 14443-4 standard. More...
brp_errcode	brp_Iso14L4_Deselect (brp_Iso14L4_Deselect_t params)
	This command switches one or multiple PICC(s) to halt state. More...

Detailed Description

This command group implements the low-level ISO 14443-4 commands according to the ISO 14443-4 standard.

While the ISO 14443-3 Type A and Type B standards define request and selection mechanisms for PICCs, the ISO 14443-4 standard defines a protocol capable of transferring so-called application layer data units (APDUs) with previously selected labels.

Please refer to the ISO 14443-3 (Type A) command group documentation or to the ISO 14443-3 (Type B) command group documentation for more information on how to put ISO 14443-3 (Type A) or ISO 14443-3 (Type B) PICCs into the active state.

APDUs can be transmitted and received to/from a PICC using the brp_Iso14L4_ExchangeAPDU() command, provided the PICC is in active state. Before calling the brp_Iso14L4_ExchangeAPDU() command, the target PICC has to be selected using the brp_Iso14L4_SetupAPDU() command. The brp_Iso14L4_SetupAPDU() command furthermore enables to change the communication parameters of the reader to match the capabilities of the target PICC. These communication parameters apply to all following calls of the brp_Iso14L4_ExchangeAPDU() and brp_Iso14L4_Deselect() commands, until the brp_Iso14L4_SetupAPDU() command is called with different parameters. The brp_Iso14L4_Deselect() command is used to switch a PICC to halt state after exchange with this PICC has been completed.

PICCs can also be put to the halt state using theIso14a.Halt command or theIso14b.Halt command. However these commands only work for PICCs which are not in ISO 14443-4 mode (when considering Type A PICCs) or for PICCs in ready state, not in active state (when considering Type B PICCs). In other situations, the brp_Iso14L4_Deselect() command should be used.

Definition in file iso14l4.h.