refactor class

move new rats functions to extra class

MFRC522Extended.h

@@ -0,0 +1,110 @@
+/**
+ * Library extends MFRC522.h to support RATS for ISO-14443-4 PICC.
+ * RATS - Request for Answer To Select.
+ * @author JPG-Consulting
+ */
+#ifndef MFRC522Extended_h
+#define MFRC522Extended_h
+
+#include <Arduino.h>
+#include "MFRC522.h"
+
+class MFRC522Extended : public MFRC522 {
+		
+public:
+	// ISO/IEC 14443-4 bit rates
+	enum TagBitRates : byte {
+		BITRATE_106KBITS = 0x00,
+		BITRATE_212KBITS = 0x01,
+		BITRATE_424KBITS = 0x02,
+		BITRATE_848KBITS = 0x03
+	};
+
+	// Structure to store ISO/IEC 14443-4 ATS
+	typedef struct {
+		byte size;
+		byte fsc;                 // Frame size for proximity card
+
+		struct {
+			bool transmitted;
+			bool        sameD;	// Only the same D for both directions supported
+			TagBitRates ds;		// Send D
+			TagBitRates dr;		// Receive D
+		} ta1;
+
+		struct {
+			bool transmitted;
+			byte fwi;			// Frame waiting time integer
+			byte sfgi;			// Start-up frame guard time integer
+		} tb1;
+
+		struct {
+			bool transmitted;
+			bool supportsCID;
+			bool supportsNAD;
+		} tc1;
+
+		// Raw data from ATS
+		byte data[FIFO_SIZE - 2]; // ATS cannot be bigger than FSD - 2 bytes (CRC), according to ISO 14443-4 5.2.2
+	} Ats;
+
+	// A struct used for passing the PICC information
+	typedef struct {
+		uint16_t	atqa;
+		Uid			uid;
+		Ats		    ats; 
+
+		// For Block PCB
+		bool blockNumber;
+	} TagInfo;
+
+	// A struct used for passing PCB Block
+	typedef struct {
+		struct {
+			byte pcb;
+			byte cid;
+			byte nad;
+		} prologue;
+		struct {
+			byte size;
+			byte *data;
+		} inf;
+	} PcbBlock;
+	
+	// Member variables
+	TagInfo tag;
+	
+	/////////////////////////////////////////////////////////////////////////////////////
+	// Functions for communicating with PICCs
+	/////////////////////////////////////////////////////////////////////////////////////
+  StatusCode PICC_Select(Uid *uid, byte validBits = 0); // overwrite
+	StatusCode PICC_RequestATS(Ats *ats);
+	StatusCode PICC_PPS();	                                                  // PPS command without bitrate parameter
+	StatusCode PICC_PPS(TagBitRates sendBitRate, TagBitRates receiveBitRate); // Different D values
+	
+	/////////////////////////////////////////////////////////////////////////////////////
+	// Functions for communicating with ISO/IEC 14433-4 cards
+	/////////////////////////////////////////////////////////////////////////////////////
+	StatusCode TCL_Transceive(PcbBlock *send, PcbBlock *back);
+	StatusCode TCL_Transceive(TagInfo * tag, byte *sendData, byte sendLen, byte *backData = NULL, byte *backLen = NULL);
+	StatusCode TCL_TransceiveRBlock(TagInfo *tag, bool ack, byte *backData = NULL, byte *backLen = NULL);
+	StatusCode TCL_Deselect(TagInfo *tag);
+	
+	/////////////////////////////////////////////////////////////////////////////////////
+	// Support functions
+	/////////////////////////////////////////////////////////////////////////////////////
+	static PICC_Type PICC_GetType(TagInfo *tag);
+
+	// Support functions for debuging
+	void PICC_DumpToSerial(TagInfo *tag);
+	void PICC_DumpDetailsToSerial(TagInfo *tag);
+	void PICC_DumpISO14443_4(TagInfo *tag);
+	
+	/////////////////////////////////////////////////////////////////////////////////////
+	// Convenience functions - does not add extra functionality
+	/////////////////////////////////////////////////////////////////////////////////////
+	bool PICC_IsNewCardPresent(); // overwrite
+	bool PICC_ReadCardSerial(); // overwrite
+};
+
+#endif