Customized version of the sample given by Arduino

henyxia
1 parent bf0a878a
Showing 1 changed file with 129 additions and 0 deletions Show diff stats
main.ino
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+#include <SPI.h>
+#include <PN532_SPI.h>
+#include "PN532.h"
+
+PN532_SPI pn532spi(SPI, 10);
+PN532 nfc(pn532spi);
+
+void setup(void) {
+	Serial.begin(115200);
+	Serial.println("Hello!");
+
+	nfc.begin();
+
+	uint32_t versiondata = nfc.getFirmwareVersion();
+	if (! versiondata)
+	{
+		Serial.print("Didn't find PN53x board");
+		while (1);
+	}
+	//Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX); 
+	Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC); 
+	Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
+  
+	// configure board to read RFID tags
+	nfc.SAMConfig();
+  
+	Serial.println("Waiting for an ISO14443A Card ...");
+}
+
+
+void loop(void)
+{
+	uint8_t success;
+	uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };  // Buffer to store the returned UID
+	uint8_t uidLength;                        // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
+    
+	// Wait for an ISO14443A type cards (Mifare, etc.).  When one is found
+	// 'uid' will be populated with the UID, and uidLength will indicate
+	// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
+	success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
+  
+	if(success)
+	{
+		// Display some basic information about the card
+		Serial.println("Found an ISO14443A card");
+		Serial.print("  UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
+		Serial.print("  UID Value: ");
+		nfc.PrintHex(uid, uidLength);
+		Serial.println("");
+    
+		if(uidLength == 4)
+		{
+			// We probably have a Mifare Classic card ... 
+			Serial.println("Seems to be a Mifare Classic card (4 byte UID)");
+	  
+			 // Now we need to try to authenticate it for read/write access
+			// Try with the factory default KeyA: 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
+			Serial.println("Trying to authenticate block 4 with default KEYA value");
+			uint8_t keya[6] = { 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5 };
+	  
+			// Start with block 4 (the first block of sector 1) since sector 0
+			// contains the manufacturer data and it's probably better just
+			// to leave it alone unless you know what you're doing
+			success = nfc.mifareclassic_AuthenticateBlock(uid, uidLength, 44, 0, keya);
+	  
+			if(success)
+			{
+				Serial.println("Sector 1 (Blocks 4..7) has been authenticated");
+				uint8_t data[16];
+		
+				// If you want to write something to block 4 to test with, uncomment
+				// the following line and this text should be read back in a minute
+				// data = { 'a', 'd', 'a', 'f', 'r', 'u', 'i', 't', '.', 'c', 'o', 'm', 0, 0, 0, 0};
+				// success = nfc.mifareclassic_WriteDataBlock (4, data);
+
+				// Try to read the contents of block 4
+				success = nfc.mifareclassic_ReadDataBlock(44, data);
+		
+				if(success)
+				{
+					// Data seems to have been read ... spit it out
+					Serial.println("Reading Block 4:");
+					nfc.PrintHexChar(data, 16);
+					nfc.mifareclassic_ReadDataBlock(45, data);
+					nfc.PrintHexChar(data, 16);
+					nfc.mifareclassic_ReadDataBlock(46, data);
+					nfc.PrintHexChar(data, 16);
+					Serial.println("");
+		  
+					// Wait a bit before reading the card again
+					delay(1000);
+				}
+				else
+				{
+					Serial.println("Ooops ... unable to read the requested block.  Try another key?");
+				}
+			}
+			else
+			{
+				Serial.println("Ooops ... authentication failed: Try another key?");
+			}
+		}
+    
+		if(uidLength == 7)
+		{
+			// We probably have a Mifare Ultralight card ...
+			Serial.println("Seems to be a Mifare Ultralight tag (7 byte UID)");
+	  
+			// Try to read the first general-purpose user page (#4)
+			Serial.println("Reading page 4");
+			uint8_t data[32];
+			success = nfc.mifareultralight_ReadPage (4, data);
+			if(success)
+			{
+				// Data seems to have been read ... spit it out
+				nfc.PrintHexChar(data, 4);
+				Serial.println("");
+		
+				// Wait a bit before reading the card again
+				delay(1000);
+			}
+			else
+			{
+				Serial.println("Ooops ... unable to read the requested page!?");
+			}
+		}
+	}
+}
+