hello guys,
.
i m trying to connect rfid pn 532 shiled to arduino and a keypad to recieve password through it!!
but they both work well separately but when i try to combine them in a single program keypad is not working.
i used basic mifare read example and tried to combine it with keypad after pn532 starts reading data from mifare card,
but the keypad is not working or reading any values?
how to solve this
The answer is buried somewhere in the data sheets of the shields, or in their libraries.
Please provide links to the data sheets.
Please post code in code tags </>.
#include<Keypad.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_PN532.h>
// If using the breakout with SPI, define the pins for SPI communication.
#define PN532_SCK (9)
#define PN532_MOSI (10)
#define PN532_SS (11)
#define PN532_MISO (12)
// If using the breakout or shield with I2C, define just the pins connected
// to the IRQ and reset lines. Use the values below (2, 3) for the shield!
#define PN532_IRQ (2)
#define PN532_RESET (3) // Not connected by default on the NFC Shield
const byte Rows= 4; //number of rows on the keypad i.e. 4
const byte Cols= 3;
char keymap[Rows][Cols]=
{
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'},
{'*', '0', '#'}
};
byte rPins[Rows]= {2,3,4,5}; //Rows 0 to 3
byte cPins[Cols]= {6,7,8};
// Use this line for a breakout with a SPI connection:
Adafruit_PN532 nfc(PN532_SCK, PN532_MISO, PN532_MOSI, PN532_SS);
Keypad kpd= Keypad(makeKeymap(keymap), rPins, cPins, Rows, Cols);
void setup(void) {
Serial.begin(9600);
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
delay(2000);
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);
if (uidLength == 4)
{
// We probably have a Mifare Classic card ...
uint32_t cardid = uid[0];
cardid <<= 8;
cardid |= uid[1];
cardid <<= 8;
cardid |= uid[2];
cardid <<= 8;
cardid |= uid[3];
Serial.print("card id is : ");
Serial.println(cardid);
char keypressed = kpd.getKey();
if (keypressed != NO_KEY)
{
Serial.println(keypressed);
}
}
Serial.println("");
}
}
