Ben Zhang
Porting from Arduino Platform to mbed KL25Z. Original Source: https://github.com/adafruit/Adafruit-PN532
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readMifare
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Interactive Device Design
Diff: PN532/Adafruit_PN532.cpp
- Revision:
- 0:54bf4b21c7fa
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/PN532/Adafruit_PN532.cpp Fri Sep 19 05:04:15 2014 +0000
@@ -0,0 +1,1030 @@
+/**************************************************************************/
+/*!
+ @file Adafruit_PN532.cpp
+ @author Adafruit Industries
+ @license BSD (see license.txt)
+
+ SPI Driver for NXP's PN532 NFC/13.56MHz RFID Transceiver
+
+ This is a library 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 SPI to communicate, 4 required to interface
+
+ Adafruit invests time and resources providing this open source code,
+ please support Adafruit and open-source hardware by purchasing
+ products from Adafruit!
+
+
+ @section HISTORY
+
+ v1.4 - Added setPassiveActivationRetries()
+
+ v1.2 - Added writeGPIO()
+ - Added readGPIO()
+
+ v1.1 - Changed readPassiveTargetID() to handle multiple UID sizes
+ - Added the following helper functions for text display
+ static void PrintHex(const uint8_t * data, const uint32_t numuint8_ts)
+ static void PrintHexChar(const uint8_t * pbtData, const uint32_t numuint8_ts)
+ - Added the following Mifare Classic functions:
+ bool mifareclassic_IsFirstBlock (uint32_t uiBlock)
+ bool mifareclassic_IsTrailerBlock (uint32_t uiBlock)
+ uint8_t mifareclassic_AuthenticateBlock (uint8_t * uid, uint8_t uidLen, uint32_t blockNumber, uint8_t keyNumber, uint8_t * keyData)
+ uint8_t mifareclassic_ReadDataBlock (uint8_t blockNumber, uint8_t * data)
+ uint8_t mifareclassic_WriteDataBlock (uint8_t blockNumber, uint8_t * data)
+ - Added the following Mifare Ultalight functions:
+ uint8_t mifareultralight_ReadPage (uint8_t page, uint8_t * buffer)
+*/
+/**************************************************************************/
+
+#include "Adafruit_PN532.h"
+
+uint8_t pn532ack[] = {0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00};
+uint8_t pn532response_firmwarevers[] = {0x00, 0xFF, 0x06, 0xFA, 0xD5, 0x03};
+
+// Uncomment these lines to enable debug output for PN532(SPI) and/or MIFARE related code
+// #define PN532DEBUG
+// #define MIFAREDEBUG
+
+Serial serial(USBTX, USBRX);
+#define SERIAL_PRINT serial.printf
+
+#define _BV(bit) (1 << (bit))
+#define PN532_PACKBUFFSIZ 64
+uint8_t pn532_packetbuffer[PN532_PACKBUFFSIZ];
+
+void delay(int delayInMS) {
+ wait(1.0 * delayInMS / 1000);
+}
+
+/**************************************************************************/
+/*!
+ @brief Instantiates a new PN532 class
+
+ @param clk SPI clock pin (SCK)
+ @param miso SPI MISO pin
+ @param mosi SPI MOSI pin
+ @param ss SPI chip select pin (CS/SSEL)
+*/
+/**************************************************************************/
+Adafruit_PN532::Adafruit_PN532(DigitalOut clk, DigitalIn miso,
+ DigitalOut mosi, DigitalOut ss)
+ : _clk(clk), _miso(miso), _mosi(mosi), _ss(ss) {}
+
+Adafruit_PN532::Adafruit_PN532(PinName clk_pin, PinName miso_pin,
+ PinName mosi_pin, PinName ss_pin)
+ : _clk(DigitalOut(clk_pin)), _miso(DigitalIn(miso_pin)),
+ _mosi(DigitalOut(mosi_pin)), _ss(DigitalOut(ss_pin)) {}
+
+/**************************************************************************/
+/*!
+ @brief Setups the HW
+*/
+/**************************************************************************/
+void Adafruit_PN532::begin() {
+ _ss = 0;
+ delay(1000);
+
+ // not exactly sure why but we have to send a dummy command to get synced up
+ pn532_packetbuffer[0] = PN532_COMMAND_GETFIRMWAREVERSION;
+ sendCommandCheckAck(pn532_packetbuffer, 1);
+
+ // ignore response!
+}
+
+/**************************************************************************/
+/*!
+ @brief Prints a hexadecimal value in plain characters
+
+ @param data Pointer to the uint8_t data
+ @param numuint8_ts Data length in uint8_ts
+*/
+/**************************************************************************/
+void Adafruit_PN532::PrintHex(const uint8_t * data, const uint32_t numuint8_ts)
+{
+ uint32_t szPos;
+ for (szPos=0; szPos < numuint8_ts; szPos++)
+ {
+ SERIAL_PRINT("0x");
+ // Append leading 0 for small values
+ if (data[szPos] <= 0xF)
+ SERIAL_PRINT("0");
+ SERIAL_PRINT("%d", data[szPos]);
+ if ((numuint8_ts > 1) && (szPos != numuint8_ts - 1))
+ {
+ SERIAL_PRINT(" ");
+ }
+ }
+ SERIAL_PRINT("\n");
+}
+
+/**************************************************************************/
+/*!
+ @brief Prints a hexadecimal value in plain characters, along with
+ the char equivalents in the following format
+
+ 00 00 00 00 00 00 ......
+
+ @param data Pointer to the uint8_t data
+ @param numuint8_ts Data length in uint8_ts
+*/
+/**************************************************************************/
+void Adafruit_PN532::PrintHexChar(const uint8_t * data, const uint32_t numuint8_ts)
+{
+ uint32_t szPos;
+ for (szPos=0; szPos < numuint8_ts; szPos++)
+ {
+ // Append leading 0 for small values
+ if (data[szPos] <= 0xF)
+ SERIAL_PRINT("0");
+ SERIAL_PRINT("%x", data[szPos]);
+ if ((numuint8_ts > 1) && (szPos != numuint8_ts - 1))
+ {
+ SERIAL_PRINT(" ");
+ }
+ }
+ SERIAL_PRINT(" ");
+ for (szPos=0; szPos < numuint8_ts; szPos++)
+ {
+ if (data[szPos] <= 0x1F)
+ SERIAL_PRINT(".");
+ else
+ SERIAL_PRINT("%c", data[szPos]);
+ }
+ SERIAL_PRINT("");
+}
+
+/**************************************************************************/
+/*!
+ @brief Checks the firmware version of the PN5xx chip
+
+ @returns The chip's firmware version and ID
+*/
+/**************************************************************************/
+uint32_t Adafruit_PN532::getFirmwareVersion(void) {
+ uint32_t response;
+
+ pn532_packetbuffer[0] = PN532_COMMAND_GETFIRMWAREVERSION;
+
+ if (! sendCommandCheckAck(pn532_packetbuffer, 1))
+ return 0;
+
+ // read data packet
+ readspidata(pn532_packetbuffer, 12);
+
+ // check some basic stuff
+ if (0 != strncmp((char *)pn532_packetbuffer, (char *)pn532response_firmwarevers, 6)) {
+ return 0;
+ }
+
+ response = pn532_packetbuffer[6];
+ response <<= 8;
+ response |= pn532_packetbuffer[7];
+ response <<= 8;
+ response |= pn532_packetbuffer[8];
+ response <<= 8;
+ response |= pn532_packetbuffer[9];
+
+ return response;
+}
+
+
+/**************************************************************************/
+/*!
+ @brief Sends a command and waits a specified period for the ACK
+
+ @param cmd Pointer to the command buffer
+ @param cmdlen The size of the command in uint8_ts
+ @param timeout timeout before giving up
+
+ @returns 1 if everything is OK, 0 if timeout occured before an
+ ACK was recieved
+*/
+/**************************************************************************/
+// default timeout of one second
+bool Adafruit_PN532::sendCommandCheckAck(uint8_t *cmd, uint8_t cmdlen, uint16_t timeout) {
+ uint16_t timer = 0;
+
+ // write the command
+ spiwritecommand(cmd, cmdlen);
+
+ // Wait for chip to say its ready!
+ while (readspistatus() != PN532_SPI_READY) {
+ if (timeout != 0) {
+ timer+=10;
+ if (timer > timeout)
+ return false;
+ }
+ delay(10);
+ }
+
+ // read acknowledgement
+ if (!spi_readack()) {
+ return false;
+ }
+
+ timer = 0;
+ // Wait for chip to say its ready!
+ while (readspistatus() != PN532_SPI_READY) {
+ if (timeout != 0) {
+ timer+=10;
+ if (timer > timeout)
+ return false;
+ }
+ delay(10);
+ }
+
+ return true; // ack'd command
+}
+
+/**************************************************************************/
+/*!
+ Writes an 8-bit value that sets the state of the PN532's GPIO pins
+
+ @warning This function is provided exclusively for board testing and
+ is dangerous since it will throw an error if any pin other
+ than the ones marked "Can be used as GPIO" are modified! All
+ pins that can not be used as GPIO should ALWAYS be left high
+ (value = 1) or the system will become unstable and a HW reset
+ will be required to recover the PN532.
+
+ pinState[0] = P30 Can be used as GPIO
+ pinState[1] = P31 Can be used as GPIO
+ pinState[2] = P32 *** RESERVED (Must be 1!) ***
+ pinState[3] = P33 Can be used as GPIO
+ pinState[4] = P34 *** RESERVED (Must be 1!) ***
+ pinState[5] = P35 Can be used as GPIO
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+bool Adafruit_PN532::writeGPIO(uint8_t pinstate) {
+ // Make sure pinstate does not try to toggle P32 or P34
+ pinstate |= (1 << PN532_GPIO_P32) | (1 << PN532_GPIO_P34);
+
+ // Fill command buffer
+ pn532_packetbuffer[0] = PN532_COMMAND_WRITEGPIO;
+ pn532_packetbuffer[1] = PN532_GPIO_VALIDATIONBIT | pinstate; // P3 Pins
+ pn532_packetbuffer[2] = 0x00; // P7 GPIO Pins (not used ... taken by SPI)
+
+ #ifdef PN532DEBUG
+ SERIAL_PRINT("Writing P3 GPIO: "); SERIAL_PRINTln(pn532_packetbuffer[1], HEX);
+ #endif
+
+ // Send the WRITEGPIO command (0x0E)
+ if (! sendCommandCheckAck(pn532_packetbuffer, 3))
+ return 0x0;
+
+ // Read response packet (00 FF PLEN PLENCHECKSUM D5 CMD+1(0x0F) DATACHECKSUM 00)
+ readspidata(pn532_packetbuffer, 8);
+
+ #ifdef PN532DEBUG
+ SERIAL_PRINT("Received: ");
+ PrintHex(pn532_packetbuffer, 8);
+ SERIAL_PRINTln("");
+ #endif
+
+ return (pn532_packetbuffer[5] == 0x0F);
+}
+
+/**************************************************************************/
+/*!
+ Reads the state of the PN532's GPIO pins
+
+ @returns An 8-bit value containing the pin state where:
+
+ pinState[0] = P30
+ pinState[1] = P31
+ pinState[2] = P32
+ pinState[3] = P33
+ pinState[4] = P34
+ pinState[5] = P35
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::readGPIO(void) {
+ pn532_packetbuffer[0] = PN532_COMMAND_READGPIO;
+
+ // Send the READGPIO command (0x0C)
+ if (! sendCommandCheckAck(pn532_packetbuffer, 1))
+ return 0x0;
+
+ // Read response packet (00 FF PLEN PLENCHECKSUM D5 CMD+1(0x0D) P3 P7 IO1 DATACHECKSUM 00)
+ readspidata(pn532_packetbuffer, 11);
+
+ /* READGPIO response should be in the following format:
+
+ uint8_t Description
+ ------------- ------------------------------------------
+ b0..5 Frame header and preamble
+ b6 P3 GPIO Pins
+ b7 P7 GPIO Pins (not used ... taken by SPI)
+ b8 Interface Mode Pins (not used ... bus select pins)
+ b9..10 checksum */
+
+ #ifdef PN532DEBUG
+ SERIAL_PRINT("Received: ");
+ PrintHex(pn532_packetbuffer, 11);
+ SERIAL_PRINTln("");
+ SERIAL_PRINT("P3 GPIO: 0x"); SERIAL_PRINTln(pn532_packetbuffer[6], HEX);
+ SERIAL_PRINT("P7 GPIO: 0x"); SERIAL_PRINTln(pn532_packetbuffer[7], HEX);
+ SERIAL_PRINT("IO GPIO: 0x"); SERIAL_PRINTln(pn532_packetbuffer[8], HEX);
+ // Note: You can use the IO GPIO value to detect the serial bus being used
+ switch(pn532_packetbuffer[8])
+ {
+ case 0x00: // Using UART
+ SERIAL_PRINTln("Using UART (IO = 0x00)");
+ break;
+ case 0x01: // Using I2C
+ SERIAL_PRINTln("Using I2C (IO = 0x01)");
+ break;
+ case 0x02: // Using SPI
+ SERIAL_PRINTln("Using SPI (IO = 0x02)");
+ break;
+ }
+ #endif
+
+ return pn532_packetbuffer[6];
+}
+
+/**************************************************************************/
+/*!
+ @brief Configures the SAM (Secure Access Module)
+*/
+/**************************************************************************/
+bool Adafruit_PN532::SAMConfig(void) {
+ pn532_packetbuffer[0] = PN532_COMMAND_SAMCONFIGURATION;
+ pn532_packetbuffer[1] = 0x01; // normal mode;
+ pn532_packetbuffer[2] = 0x14; // timeout 50ms * 20 = 1 second
+ pn532_packetbuffer[3] = 0x01; // use IRQ pin!
+
+ if (! sendCommandCheckAck(pn532_packetbuffer, 4))
+ return false;
+
+ // read data packet
+ readspidata(pn532_packetbuffer, 8);
+
+ return (pn532_packetbuffer[5] == 0x15);
+}
+
+/**************************************************************************/
+/*!
+ Sets the MxRtyPassiveActivation uint8_t of the RFConfiguration register
+
+ @param maxRetries 0xFF to wait forever, 0x00..0xFE to timeout
+ after mxRetries
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+bool Adafruit_PN532::setPassiveActivationRetries(uint8_t maxRetries) {
+ pn532_packetbuffer[0] = PN532_COMMAND_RFCONFIGURATION;
+ pn532_packetbuffer[1] = 5; // Config item 5 (MaxRetries)
+ pn532_packetbuffer[2] = 0xFF; // MxRtyATR (default = 0xFF)
+ pn532_packetbuffer[3] = 0x01; // MxRtyPSL (default = 0x01)
+ pn532_packetbuffer[4] = maxRetries;
+
+#ifdef MIFAREDEBUG
+ SERIAL_PRINT("Setting MxRtyPassiveActivation to "); SERIAL_PRINT(maxRetries, DEC); SERIAL_PRINTln(" ");
+#endif
+
+ if (! sendCommandCheckAck(pn532_packetbuffer, 5))
+ return 0x0; // no ACK
+
+ return 1;
+}
+
+/***** ISO14443A Commands ******/
+
+/**************************************************************************/
+/*!
+ Waits for an ISO14443A target to enter the field
+
+ @param cardBaudRate Baud rate of the card
+ @param uid Pointer to the array that will be populated
+ with the card's UID (up to 7 uint8_ts)
+ @param uidLength Pointer to the variable that will hold the
+ length of the card's UID.
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+bool Adafruit_PN532::readPassiveTargetID(uint8_t cardbaudrate, uint8_t * uid, uint8_t * uidLength) {
+ pn532_packetbuffer[0] = PN532_COMMAND_INLISTPASSIVETARGET;
+ pn532_packetbuffer[1] = 1; // max 1 cards at once (we can set this to 2 later)
+ pn532_packetbuffer[2] = cardbaudrate;
+
+ if (! sendCommandCheckAck(pn532_packetbuffer, 3))
+ return 0x0; // no cards read
+
+ // read data packet
+ readspidata(pn532_packetbuffer, 20);
+ // check some basic stuff
+
+ /* ISO14443A card response should be in the following format:
+
+ uint8_t Description
+ ------------- ------------------------------------------
+ b0..6 Frame header and preamble
+ b7 Tags Found
+ b8 Tag Number (only one used in this example)
+ b9..10 SENS_RES
+ b11 SEL_RES
+ b12 NFCID Length
+ b13..NFCIDLen NFCID */
+
+#ifdef MIFAREDEBUG
+ SERIAL_PRINT("Found "); SERIAL_PRINT(pn532_packetbuffer[7], DEC); SERIAL_PRINTln(" tags");
+#endif
+ if (pn532_packetbuffer[7] != 1)
+ return 0;
+
+ uint16_t sens_res = pn532_packetbuffer[9];
+ sens_res <<= 8;
+ sens_res |= pn532_packetbuffer[10];
+#ifdef MIFAREDEBUG
+ SERIAL_PRINT("ATQA: 0x"); SERIAL_PRINTln(sens_res, HEX);
+ SERIAL_PRINT("SAK: 0x"); SERIAL_PRINTln(pn532_packetbuffer[11], HEX);
+#endif
+
+ /* Card appears to be Mifare Classic */
+ *uidLength = pn532_packetbuffer[12];
+#ifdef MIFAREDEBUG
+ SERIAL_PRINT("UID:");
+#endif
+ for (uint8_t i=0; i < pn532_packetbuffer[12]; i++)
+ {
+ uid[i] = pn532_packetbuffer[13+i];
+#ifdef MIFAREDEBUG
+ SERIAL_PRINT(" 0x");SERIAL_PRINT(uid[i], HEX);
+#endif
+ }
+#ifdef MIFAREDEBUG
+ SERIAL_PRINTln();
+#endif
+
+ return 1;
+}
+
+
+/***** Mifare Classic Functions ******/
+
+/**************************************************************************/
+/*!
+ Indicates whether the specified block number is the first block
+ in the sector (block 0 relative to the current sector)
+*/
+/**************************************************************************/
+bool Adafruit_PN532::mifareclassic_IsFirstBlock (uint32_t uiBlock)
+{
+ // Test if we are in the small or big sectors
+ if (uiBlock < 128)
+ return ((uiBlock) % 4 == 0);
+ else
+ return ((uiBlock) % 16 == 0);
+}
+
+/**************************************************************************/
+/*!
+ Indicates whether the specified block number is the sector trailer
+*/
+/**************************************************************************/
+bool Adafruit_PN532::mifareclassic_IsTrailerBlock (uint32_t uiBlock)
+{
+ // Test if we are in the small or big sectors
+ if (uiBlock < 128)
+ return ((uiBlock + 1) % 4 == 0);
+ else
+ return ((uiBlock + 1) % 16 == 0);
+}
+
+/**************************************************************************/
+/*!
+ Tries to authenticate a block of memory on a MIFARE card using the
+ INDATAEXCHANGE command. See section 7.3.8 of the PN532 User Manual
+ for more information on sending MIFARE and other commands.
+
+ @param uid Pointer to a uint8_t array containing the card UID
+ @param uidLen The length (in uint8_ts) of the card's UID (Should
+ be 4 for MIFARE Classic)
+ @param blockNumber The block number to authenticate. (0..63 for
+ 1KB cards, and 0..255 for 4KB cards).
+ @param keyNumber Which key type to use during authentication
+ (0 = MIFARE_CMD_AUTH_A, 1 = MIFARE_CMD_AUTH_B)
+ @param keyData Pointer to a uint8_t array containing the 6 uint8_t
+ key value
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::mifareclassic_AuthenticateBlock (uint8_t * uid, uint8_t uidLen, uint32_t blockNumber, uint8_t keyNumber, uint8_t * keyData)
+{
+ uint8_t i;
+
+ // Hang on to the key and uid data
+ memcpy (_key, keyData, 6);
+ memcpy (_uid, uid, uidLen);
+ _uidLen = uidLen;
+
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINT("Trying to authenticate card ");
+ Adafruit_PN532::PrintHex(_uid, _uidLen);
+ SERIAL_PRINT("Using authentication KEY ");SERIAL_PRINT(keyNumber ? 'B' : 'A');SERIAL_PRINT(": ");
+ Adafruit_PN532::PrintHex(_key, 6);
+ #endif
+
+ // Prepare the authentication command //
+ pn532_packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE; /* Data Exchange Header */
+ pn532_packetbuffer[1] = 1; /* Max card numbers */
+ pn532_packetbuffer[2] = (keyNumber) ? MIFARE_CMD_AUTH_B : MIFARE_CMD_AUTH_A;
+ pn532_packetbuffer[3] = blockNumber; /* Block Number (1K = 0..63, 4K = 0..255 */
+ memcpy (pn532_packetbuffer+4, _key, 6);
+ for (i = 0; i < _uidLen; i++)
+ {
+ pn532_packetbuffer[10+i] = _uid[i]; /* 4 uint8_t card ID */
+ }
+
+ if (! sendCommandCheckAck(pn532_packetbuffer, 10+_uidLen))
+ return 0;
+
+ // Read the response packet
+ readspidata(pn532_packetbuffer, 12);
+ // check if the response is valid and we are authenticated???
+ // for an auth success it should be uint8_ts 5-7: 0xD5 0x41 0x00
+ // Mifare auth error is technically uint8_t 7: 0x14 but anything other and 0x00 is not good
+ if (pn532_packetbuffer[7] != 0x00)
+ {
+ #ifdef PN532DEBUG
+ SERIAL_PRINT("Authentification failed: ");
+ Adafruit_PN532::PrintHexChar(pn532_packetbuffer, 12);
+ #endif
+ return 0;
+ }
+
+ return 1;
+}
+
+/**************************************************************************/
+/*!
+ Tries to read an entire 16-uint8_t data block at the specified block
+ address.
+
+ @param blockNumber The block number to authenticate. (0..63 for
+ 1KB cards, and 0..255 for 4KB cards).
+ @param data Pointer to the uint8_t array that will hold the
+ retrieved data (if any)
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::mifareclassic_ReadDataBlock (uint8_t blockNumber, uint8_t * data)
+{
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINT("Trying to read 16 uint8_ts from block ");SERIAL_PRINTln(blockNumber);
+ #endif
+
+ /* Prepare the command */
+ pn532_packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE;
+ pn532_packetbuffer[1] = 1; /* Card number */
+ pn532_packetbuffer[2] = MIFARE_CMD_READ; /* Mifare Read command = 0x30 */
+ pn532_packetbuffer[3] = blockNumber; /* Block Number (0..63 for 1K, 0..255 for 4K) */
+
+ /* Send the command */
+ if (! sendCommandCheckAck(pn532_packetbuffer, 4))
+ {
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINTln("Failed to receive ACK for read command");
+ #endif
+ return 0;
+ }
+
+ /* Read the response packet */
+ readspidata(pn532_packetbuffer, 26);
+
+ /* If uint8_t 8 isn't 0x00 we probably have an error */
+ if (pn532_packetbuffer[7] != 0x00)
+ {
+ //#ifdef MIFAREDEBUG
+ SERIAL_PRINT("Unexpected response");
+ Adafruit_PN532::PrintHexChar(pn532_packetbuffer, 26);
+ //#endif
+ return 0;
+ }
+
+ /* Copy the 16 data uint8_ts to the output buffer */
+ /* Block content starts at uint8_t 9 of a valid response */
+ memcpy (data, pn532_packetbuffer+8, 16);
+
+ /* Display data for debug if requested */
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINT("Block ");
+ SERIAL_PRINTln(blockNumber);
+ Adafruit_PN532::PrintHexChar(data, 16);
+ #endif
+
+ return 1;
+}
+
+/**************************************************************************/
+/*!
+ Tries to write an entire 16-uint8_t data block at the specified block
+ address.
+
+ @param blockNumber The block number to authenticate. (0..63 for
+ 1KB cards, and 0..255 for 4KB cards).
+ @param data The uint8_t array that contains the data to write.
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::mifareclassic_WriteDataBlock (uint8_t blockNumber, uint8_t * data)
+{
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINT("Trying to write 16 uint8_ts to block ");SERIAL_PRINTln(blockNumber);
+ #endif
+
+ /* Prepare the first command */
+ pn532_packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE;
+ pn532_packetbuffer[1] = 1; /* Card number */
+ pn532_packetbuffer[2] = MIFARE_CMD_WRITE; /* Mifare Write command = 0xA0 */
+ pn532_packetbuffer[3] = blockNumber; /* Block Number (0..63 for 1K, 0..255 for 4K) */
+ memcpy (pn532_packetbuffer+4, data, 16); /* Data Payload */
+
+ /* Send the command */
+ if (! sendCommandCheckAck(pn532_packetbuffer, 20))
+ {
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINTln("Failed to receive ACK for write command");
+ #endif
+ return 0;
+ }
+ delay(10);
+
+ /* Read the response packet */
+ readspidata(pn532_packetbuffer, 26);
+
+ return 1;
+}
+
+/**************************************************************************/
+/*!
+ Formats a Mifare Classic card to store NDEF Records
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::mifareclassic_FormatNDEF (void)
+{
+ uint8_t sectorbuffer1[16] = {0x14, 0x01, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1};
+ uint8_t sectorbuffer2[16] = {0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1};
+ uint8_t sectorbuffer3[16] = {0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0x78, 0x77, 0x88, 0xC1, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+
+ // Write block 1 and 2 to the card
+ if (!(mifareclassic_WriteDataBlock (1, sectorbuffer1)))
+ return 0;
+ if (!(mifareclassic_WriteDataBlock (2, sectorbuffer2)))
+ return 0;
+ // Write key A and access rights card
+ if (!(mifareclassic_WriteDataBlock (3, sectorbuffer3)))
+ return 0;
+
+ // Seems that everything was OK (?!)
+ return 1;
+}
+
+/**************************************************************************/
+/*!
+ Writes an NDEF URI Record to the specified sector (1..15)
+
+ Note that this function assumes that the Mifare Classic card is
+ already formatted to work as an "NFC Forum Tag" and uses a MAD1
+ file system. You can use the NXP TagWriter app on Android to
+ properly format cards for this.
+
+ @param sectorNumber The sector that the URI record should be written
+ to (can be 1..15 for a 1K card)
+ @param uriIdentifier The uri identifier code (0 = none, 0x01 =
+ "http://www.", etc.)
+ @param url The uri text to write (max 38 characters).
+
+ @returns 1 if everything executed properly, 0 for an error
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::mifareclassic_WriteNDEFURI (uint8_t sectorNumber, uint8_t uriIdentifier, const char * url)
+{
+ // Figure out how long the string is
+ uint8_t len = strlen(url);
+
+ // Make sure we're within a 1K limit for the sector number
+ if ((sectorNumber < 1) || (sectorNumber > 15))
+ return 0;
+
+ // Make sure the URI payload is between 1 and 38 chars
+ if ((len < 1) || (len > 38))
+ return 0;
+
+ // Setup the sector buffer (w/pre-formatted TLV wrapper and NDEF message)
+ uint8_t sectorbuffer1[16] = {0x00, 0x00, 0x03, len+5, 0xD1, 0x01, len+1, 0x55, uriIdentifier, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+ uint8_t sectorbuffer2[16] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+ uint8_t sectorbuffer3[16] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+ uint8_t sectorbuffer4[16] = {0xD3, 0xF7, 0xD3, 0xF7, 0xD3, 0xF7, 0x7F, 0x07, 0x88, 0x40, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
+ if (len <= 6)
+ {
+ // Unlikely we'll get a url this short, but why not ...
+ memcpy (sectorbuffer1+9, url, len);
+ sectorbuffer1[len+9] = 0xFE;
+ }
+ else if (len == 7)
+ {
+ // 0xFE needs to be wrapped around to next block
+ memcpy (sectorbuffer1+9, url, len);
+ sectorbuffer2[0] = 0xFE;
+ }
+ else if ((len > 7) || (len <= 22))
+ {
+ // Url fits in two blocks
+ memcpy (sectorbuffer1+9, url, 7);
+ memcpy (sectorbuffer2, url+7, len-7);
+ sectorbuffer2[len-7] = 0xFE;
+ }
+ else if (len == 23)
+ {
+ // 0xFE needs to be wrapped around to final block
+ memcpy (sectorbuffer1+9, url, 7);
+ memcpy (sectorbuffer2, url+7, len-7);
+ sectorbuffer3[0] = 0xFE;
+ }
+ else
+ {
+ // Url fits in three blocks
+ memcpy (sectorbuffer1+9, url, 7);
+ memcpy (sectorbuffer2, url+7, 16);
+ memcpy (sectorbuffer3, url+23, len-24);
+ sectorbuffer3[len-22] = 0xFE;
+ }
+
+ // Now write all three blocks back to the card
+ if (!(mifareclassic_WriteDataBlock (sectorNumber*4, sectorbuffer1)))
+ return 0;
+ if (!(mifareclassic_WriteDataBlock ((sectorNumber*4)+1, sectorbuffer2)))
+ return 0;
+ if (!(mifareclassic_WriteDataBlock ((sectorNumber*4)+2, sectorbuffer3)))
+ return 0;
+ if (!(mifareclassic_WriteDataBlock ((sectorNumber*4)+3, sectorbuffer4)))
+ return 0;
+
+ // Seems that everything was OK (?!)
+ return 1;
+}
+
+/***** Mifare Ultralight Functions ******/
+
+/**************************************************************************/
+/*!
+ Tries to read an entire 4-uint8_t page at the specified address.
+
+ @param page The page number (0..63 in most cases)
+ @param buffer Pointer to the uint8_t array that will hold the
+ retrieved data (if any)
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::mifareultralight_ReadPage (uint8_t page, uint8_t * buffer)
+{
+ if (page >= 64)
+ {
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINTln("Page value out of range");
+ #endif
+ return 0;
+ }
+
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINT("Reading page ");SERIAL_PRINTln(page);
+ #endif
+
+ /* Prepare the command */
+ pn532_packetbuffer[0] = PN532_COMMAND_INDATAEXCHANGE;
+ pn532_packetbuffer[1] = 1; /* Card number */
+ pn532_packetbuffer[2] = MIFARE_CMD_READ; /* Mifare Read command = 0x30 */
+ pn532_packetbuffer[3] = page; /* Page Number (0..63 in most cases) */
+
+ /* Send the command */
+ if (! sendCommandCheckAck(pn532_packetbuffer, 4))
+ {
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINTln("Failed to receive ACK for write command");
+ #endif
+ return 0;
+ }
+
+ /* Read the response packet */
+ readspidata(pn532_packetbuffer, 26);
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINTln("Received: ");
+ Adafruit_PN532::PrintHexChar(pn532_packetbuffer, 26);
+ #endif
+
+ /* If uint8_t 8 isn't 0x00 we probably have an error */
+ if (pn532_packetbuffer[7] == 0x00)
+ {
+ /* Copy the 4 data uint8_ts to the output buffer */
+ /* Block content starts at uint8_t 9 of a valid response */
+ /* Note that the command actually reads 16 uint8_t or 4 */
+ /* pages at a time ... we simply discard the last 12 */
+ /* uint8_ts */
+ memcpy (buffer, pn532_packetbuffer+8, 4);
+ }
+ else
+ {
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINTln("Unexpected response reading block: ");
+ Adafruit_PN532::PrintHexChar(pn532_packetbuffer, 26);
+ #endif
+ return 0;
+ }
+
+ /* Display data for debug if requested */
+ #ifdef MIFAREDEBUG
+ SERIAL_PRINT("Page ");SERIAL_PRINT(page);SERIAL_PRINTln(":");
+ Adafruit_PN532::PrintHexChar(buffer, 4);
+ #endif
+
+ // Return OK signal
+ return 1;
+}
+
+
+
+/************** high level SPI */
+
+
+/**************************************************************************/
+/*!
+ @brief Tries to read the SPI ACK signal
+*/
+/**************************************************************************/
+bool Adafruit_PN532::spi_readack() {
+ uint8_t ackbuff[6];
+
+ readspidata(ackbuff, 6);
+
+ return (0 == strncmp((char *)ackbuff, (char *)pn532ack, 6));
+}
+
+/************** mid level SPI */
+
+/**************************************************************************/
+/*!
+ @brief Reads the SPI status register (to know if the PN532 is ready)
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::readspistatus(void) {
+ _ss = 0;
+ delay(2);
+ spiwrite(PN532_SPI_STATREAD);
+ // read uint8_t
+ uint8_t x = spiread();
+
+ _ss = 1;
+ return x;
+}
+
+/**************************************************************************/
+/*!
+ @brief Reads n uint8_ts of data from the PN532 via SPI
+
+ @param buff Pointer to the buffer where data will be written
+ @param n Number of uint8_ts to be read
+*/
+/**************************************************************************/
+void Adafruit_PN532::readspidata(uint8_t* buff, uint8_t n) {
+ _ss = 0;
+ delay(2);
+ spiwrite(PN532_SPI_DATAREAD);
+
+#ifdef PN532DEBUG
+ SERIAL_PRINT("Reading: ");
+#endif
+ for (uint8_t i=0; i<n; i++) {
+ delay(1);
+ buff[i] = spiread();
+#ifdef PN532DEBUG
+ SERIAL_PRINT(" 0x");
+ SERIAL_PRINT(buff[i], HEX);
+#endif
+ }
+
+#ifdef PN532DEBUG
+ SERIAL_PRINTln();
+#endif
+
+ _ss = 1;
+}
+
+/**************************************************************************/
+/*!
+ @brief Writes a command to the PN532, automatically inserting the
+ preamble and required frame details (checksum, len, etc.)
+
+ @param cmd Pointer to the command buffer
+ @param cmdlen Command length in uint8_ts
+*/
+/**************************************************************************/
+void Adafruit_PN532::spiwritecommand(uint8_t* cmd, uint8_t cmdlen) {
+ uint8_t checksum;
+
+ cmdlen++;
+
+#ifdef PN532DEBUG
+ SERIAL_PRINT("\nSending: ");
+#endif
+
+ _ss = 0;
+ delay(2); // or whatever the delay is for waking up the board
+ spiwrite(PN532_SPI_DATAWRITE);
+
+ checksum = PN532_PREAMBLE + PN532_PREAMBLE + PN532_STARTCODE2;
+ spiwrite(PN532_PREAMBLE);
+ spiwrite(PN532_PREAMBLE);
+ spiwrite(PN532_STARTCODE2);
+
+ spiwrite(cmdlen);
+ spiwrite(~cmdlen + 1);
+
+ spiwrite(PN532_HOSTTOPN532);
+ checksum += PN532_HOSTTOPN532;
+
+#ifdef PN532DEBUG
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(PN532_PREAMBLE, HEX);
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(PN532_PREAMBLE, HEX);
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(PN532_STARTCODE2, HEX);
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(cmdlen, HEX);
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(~cmdlen + 1, HEX);
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(PN532_HOSTTOPN532, HEX);
+#endif
+
+ for (uint8_t i=0; i<cmdlen-1; i++) {
+ spiwrite(cmd[i]);
+ checksum += cmd[i];
+#ifdef PN532DEBUG
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(cmd[i], HEX);
+#endif
+ }
+
+ spiwrite(~checksum);
+ spiwrite(PN532_POSTAMBLE);
+ _ss = 1;
+
+#ifdef PN532DEBUG
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(~checksum, HEX);
+ SERIAL_PRINT(" 0x"); SERIAL_PRINT(PN532_POSTAMBLE, HEX);
+ SERIAL_PRINTln();
+#endif
+}
+/************** low level SPI */
+
+/**************************************************************************/
+/*!
+ @brief Low-level SPI write wrapper
+
+ @param c 8-bit command to write to the SPI bus
+*/
+/**************************************************************************/
+void Adafruit_PN532::spiwrite(uint8_t c) {
+ int8_t i;
+ _clk = 1;
+
+ for (i=0; i<8; i++) {
+ _clk = 0;
+ if (c & _BV(i)) {
+ _mosi = 1;
+ } else {
+ _mosi = 0;
+ }
+ _clk = 1;
+ }
+}
+
+/**************************************************************************/
+/*!
+ @brief Low-level SPI read wrapper
+
+ @returns The 8-bit value that was read from the SPI bus
+*/
+/**************************************************************************/
+uint8_t Adafruit_PN532::spiread(void) {
+ int8_t i, x;
+ x = 0;
+ _clk = 1;
+
+ for (i=0; i<8; i++) {
+ if (_miso.read()) {
+ x |= _BV(i);
+ }
+ _clk = 0;
+ _clk = 1;
+ }
+ return x;
+}
\ No newline at end of file