Diff: PN532/examples/readMifare/readMifare.pde

Revision:

0:db8030e71f55

diff -r 000000000000 -r db8030e71f55 PN532/examples/readMifare/readMifare.pde
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PN532/examples/readMifare/readMifare.pde	Tue Sep 13 06:01:19 2016 +0000
@@ -0,0 +1,145 @@
+/**************************************************************************/
+/*! 
+    This example will wait for any ISO14443A card or tag, and
+    depending on the size of the UID will attempt to read from it.
+   
+    If the card has a 4-byte UID it is probably a Mifare
+    Classic card, and the following steps are taken:
+   
+    - Authenticate block 4 (the first block of Sector 1) using
+      the default KEYA of 0XFF 0XFF 0XFF 0XFF 0XFF 0XFF
+    - If authentication succeeds, we can then read any of the
+      4 blocks in that sector (though only block 4 is read here)
+	 
+    If the card has a 7-byte UID it is probably a Mifare
+    Ultralight card, and the 4 byte pages can be read directly.
+    Page 4 is read by default since this is the first 'general-
+    purpose' page on the tags.
+
+    To enable debug message, define DEBUG in PN532/PN532_debug.h
+*/
+/**************************************************************************/
+
+#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); // halt
+  }
+  // Got ok data, print it out!
+  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] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+	  
+	  // 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, 4, 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(4, data);
+		
+        if (success)
+        {
+          // Data seems to have been read ... spit it out
+          Serial.println("Reading Block 4:");
+          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!?");
+      }
+    }
+  }
+}
+