I have been using the RFID shield for a few days, and I like it a lot. I was trying to write some data to a MiFare tag (non-NDEF). It worked for blocks 4, 5, and 6. When I tried to write to block 7, the card went bizerko, and now i am unable to read/write from it. Can anyone help tell me what's wrong? The code is below...It's just a modified version of adafruit's stock readMifare sketch.
The entire code:
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/**************************************************************************/
/*!
@file readMifare.pde
@author Adafruit Industries
@license BSD (see license.txt)
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.
This is an example sketch for the Adafruit PN532 NFC/RFID breakout boards
This library works with the Adafruit NFC breakout
----> https://www.adafruit.com/products/364
Check out the links above for our tutorials and wiring diagrams
These chips use I2C to communicate
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
*/
/**************************************************************************/
#include <Wire.h>
#include <Adafruit_NFCShield_I2C.h>
#define IRQ (2)
#define RESET (3) // Not connected by default on the NFC Shield
Adafruit_NFCShield_I2C nfc(IRQ, RESET);
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] = { 'C', 'a', 'r', ' ', 'N', 'a', 'm', 'e', ':', ' ', 'M', 'i', 'h', 'i', 'r', 0};
uint8_t data2[16] = { 'M', 'a', 'k', 'e', ' ', 'H', 'o', 'n', 'd', 'a', 'A', 'c', 'c', 'o', 'r', 'd'};
uint8_t data3[16] = {"Status:"};
uint8_t data4[16] = {"Stolen"};
success = nfc.mifareclassic_WriteDataBlock (4, data);
success = nfc.mifareclassic_WriteDataBlock (5, data2);
success = nfc.mifareclassic_WriteDataBlock (6, data3);
//success = nfc.mifareclassic_WriteDataBlock (7, data4);
success = nfc.mifareclassic_ReadDataBlock(4, data);
success = nfc.mifareclassic_ReadDataBlock(5, data2);
success = nfc.mifareclassic_ReadDataBlock(6, data3);
//success = nfc.mifareclassic_ReadDataBlock(7, data4);
if (success)
{
// Data seems to have been read ... spit it out
Serial.println("Reading Block 4:");
nfc.PrintHexChar(data, 16);
nfc.PrintHexChar(data2, 16);
//nfc.PrintHexChar(data3, 16);
//nfc.PrintHexChar(data4, 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!?");
}
}
}
}
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if (success)
{
Serial.println("Sector 1 (Blocks 4..7) has been authenticated");
uint8_t data[16] = { 'C', 'a', 'r', ' ', 'N', 'a', 'm', 'e', ':', ' ', 'M', 'i', 'h', 'i', 'r', 0};
uint8_t data2[16] = { 'M', 'a', 'k', 'e', ' ', 'H', 'o', 'n', 'd', 'a', 'A', 'c', 'c', 'o', 'r', 'd'};
uint8_t data3[16] = {"Status:"};
uint8_t data4[16] = {"Stolen"};
success = nfc.mifareclassic_WriteDataBlock (4, data);
success = nfc.mifareclassic_WriteDataBlock (5, data2);
success = nfc.mifareclassic_WriteDataBlock (6, data3);
//success = nfc.mifareclassic_WriteDataBlock (7, data4);
success = nfc.mifareclassic_ReadDataBlock(4, data);
success = nfc.mifareclassic_ReadDataBlock(5, data2);
success = nfc.mifareclassic_ReadDataBlock(6, data3);
//success = nfc.mifareclassic_ReadDataBlock(7, data4);
if (success)
{
// Data seems to have been read ... spit it out
Serial.println("Reading Block 4:");
nfc.PrintHexChar(data, 16);
nfc.PrintHexChar(data2, 16);
//nfc.PrintHexChar(data3, 16);
//nfc.PrintHexChar(data4, 16);
Serial.println("");
// Wait a bit before reading the card again
delay(1000);
}
