如何解决我尝试使用 PN532 板和 Arduino Nano 读取标准 Mifare 卡，但它读取了我的代码
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>
//Interfacing dengan mode SPI
#define PN532_SCK (13)
#define PN532_MOSI (11)
#define PN532_SS (10)
#define PN532_MISO (12)
Adafruit_PN532 nfc(PN532_SCK,PN532_MISO,PN532_MOSI,PN532_SS);
void setup(void) {
Serial.begin(115200);
nfc.begin();
uint32_t versiondata = nfc.getFirmwareversion();
if (! versiondata) {
Serial.print("Didn't find PN53x board");
while (1); // halt
}
// configure board to read RFID tags
nfc.SAMConfig();
Serial.println("Waiting for an ISO14443A Card ...");
}
void loop(void) {
uint8_t success; // Flag to check if there was an error with the PN532
uint8_t uid[] = { 0,0 }; // Buffer to store the returned UID
uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
uint8_t currentblock; // Counter to keep track of which block we're on
bool authenticated = false; // Flag to indicate if the sector is authenticated
uint8_t data[16]; // Array to store block data during reads
// Keyb on NDEF and mifare Classic should be the same
uint8_t keyuniversal[6] = { 0xFF,0xFF,0xFF};
// 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 or 7)
{
// Now we try to go through all 16 sectors (each having 4 blocks)
// authenticating each sector,and then dumping the blocks
for (currentblock = 0; currentblock < 64; currentblock++)
{
// Check if this is a new block so that we can reauthenticate
if (nfc.mifareclassic_IsFirstBlock(currentblock)) authenticated = false;
// If the sector hasn't been authenticated,do so first
if (!authenticated)
{
// Starting of a new sector ... try to to authenticate
Serial.print("------------------------Sector ");Serial.print(currentblock/4,DEC);Serial.println("-------------------------");
if (currentblock == 0)
{
// This will be 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF for mifare Classic (non-NDEF!)
// or 0xA0 0xA1 0xA2 0xA3 0xA4 0xA5 for NDEF formatted cards using key a,// but keyb should be the same for both (0xFF 0xFF 0xFF 0xFF 0xFF 0xFF)
success = nfc.mifareclassic_AuthenticateBlock (uid,uidLength,currentblock,1,keyuniversal);
}
else
{
// This will be 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF for mifare Classic (non-NDEF!)
// or 0xD3 0xF7 0xD3 0xF7 0xD3 0xF7 for NDEF formatted cards using key a,keyuniversal);
}
if (success)
{
authenticated = true;
}
else
{
Serial.println("Authentication error");
}
}
// If we're still not authenticated just skip the block
if (!authenticated)
{
Serial.print("Block ");Serial.print(currentblock,DEC);Serial.println(" unable to authenticate");
}
else
{
// Authenticated ... we should be able to read the block Now
// Dump the data into the 'data' array
success = nfc.mifareclassic_ReadDataBlock(currentblock,data);
if (success)
{
// Read successful
Serial.print("Block ");Serial.print(currentblock,DEC);
if (currentblock < 10)
{
Serial.print(" ");
}
else
{
Serial.print(" ");
}
// Dump the raw data
nfc.PrintHexChar(data,64);
}
else
{
// Oops ... something happened
Serial.print("Block ");Serial.print(currentblock,DEC);
Serial.println(" unable to read this block");
}
}
}
}
else
{
Serial.println("Ooops ... this doesn't seem to be a mifare Classic card!");
}
}
// Wait a bit before trying again
Serial.println("\n\nSend a character to run the mem dumper again!");
Serial.flush();
while (!Serial.available());
while (Serial.available()) {
Serial.read();
}
Serial.flush();
}
nfc.PrintHexChar(data,64);
当我尝试使用 64 字节（我不确定它是字节还是位）或更低时，它似乎没问题，但是当我尝试更大的数字时，它也会转储我的代码。
这是我尝试转储 128 字节数据时的日志
Waiting for an ISO14443A Card ...
Found an ISO14443A card
UID Length: 4 bytes
UID Value: 0xD0 0x8E 0x1C 0x1B
------------------------Sector 0-------------------------
Block 0 D0 8E 1C 1B 59 08 04 00 62 63 64 65 66 67 68 69 D0 8E 1C 1B 00 00 00 FF FF FF FF FF FF 59 09 F8 08 00 00 00 69 00 90 00 00 FF 06 FA D5 00 00 FF 00 FF 00 00 00 37 04 80 00 FF FF FF FF FF FF 00 00 00 00 36 01 96 00 C3 00 9E 01 F4 00 D2 00 E6 00 00 00 00 00 CB 04 9E 04 FF 04 74 04 97 04 84 04 75 04 0D 0A 00 44 69 64 6E 27 74 20 66 69 6E 64 20 50 4E 35 33 78 20 62 6F 61 72 64 00 57 61 Ў..Y...bcdefghiЎ.....⸮⸮⸮⸮⸮⸮Y.Y....i.⸮..⸮.⸮⸮..⸮.⸮...7.⸮.⸮⸮⸮⸮⸮⸮....6.⸮.⸮.⸮.⸮.⸮.⸮.....⸮.⸮.⸮.t.⸮.⸮.u....Didn't find PN53x board.Wa
Block 1 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 D0 8E 1C 1B 00 00 00 FF FF FF FF FF FF 59 09 F8 08 00 00 00 69 00 90 00 00 FF 06 FA D5 00 00 FF 00 FF 00 00 00 37 04 80 00 FF FF FF FF FF FF 00 00 00 00 36 01 96 00 C3 00 9E 01 F4 00 D2 00 E6 00 00 00 00 00 CB 04 9E 04 FF 04 74 04 97 04 84 04 75 04 0D 0A 00 44 69 64 6E 27 74 20 66 69 6E 64 20 50 4E 35 33 78 20 62 6F 61 72 64 00 57 61 ................Ў.....⸮⸮⸮⸮⸮⸮Y.Y....i.⸮..⸮.⸮⸮..⸮.⸮...7.⸮.⸮⸮⸮⸮⸮⸮....6.⸮.⸮.⸮.⸮.⸮.⸮.....⸮.⸮.⸮.t.⸮.⸮.u....Didn't find PN53x board.Wa
Block 2 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 D0 8E 1C 1B 00 00 00 FF FF FF FF FF FF 59 09 F8 08 00 00 00 69 00 90 00 00 FF 06 FA D5 00 00 FF 00 FF 00 00 00 37 04 80 00 FF FF FF FF FF FF 00 00 00 00 36 01 96 00 C3 00 9E 01 F4 00 D2 00 E6 00 00 00 00 00 CB 04 9E 04 FF 04 74 04 97 04 84 04 75 04 0D 0A 00 44 69 64 6E 27 74 20 66 69 6E 64 20 50 4E 35 33 78 20 62 6F 61 72 64 00 57 61 ................Ў.....⸮⸮⸮⸮⸮⸮Y.Y....i.⸮..⸮.⸮⸮..⸮.⸮...7.⸮.⸮⸮⸮⸮⸮⸮....6.⸮.⸮.⸮.⸮.⸮.⸮.....⸮.⸮.⸮.t.⸮.⸮.u....Didn't find PN53x board.Wa
Block 3 00 00 00 00 00 00 FF 07 80 69 FF FF FF FF FF FF D0 8E 1C 1B 00 00 00 FF FF FF FF FF FF 59 09 F8 08 00 00 00 69 00 90 00 00 FF 06 FA D5 00 00 FF 00 FF 00 00 00 37 04 80 00 FF FF FF FF FF FF 00 00 00 00 36 01 96 00 C3 00 9E 01 F4 00 D2 00 E6 00 00 00 00 00 CB 04 9E 04 FF 04 74 04 97 04 84 04 75 04 0D 0A 00 44 69 64 6E 27 74 20 66 69 6E 64 20 50 4E 35 33 78 20 62 6F 61 72 64 00 57 61 ......⸮.⸮i⸮⸮⸮⸮⸮⸮Ў.....⸮⸮⸮⸮⸮⸮Y.Y....i.⸮..⸮.⸮⸮..⸮.⸮...7.⸮.⸮⸮⸮⸮⸮⸮....6.⸮.⸮.⸮.⸮.⸮.⸮.....⸮.⸮.⸮.t.⸮.⸮.u....Didn't find PN53x board.Wa
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