main.cpp

00001 //Test of cheap 13.56 Mhz RFID-RC522 module from eBay
00002 //This code is based on Martin Olejar's MFRC522 library. Minimal changes
00003 //Adapted for Nucleo STM32 F401RE. Should work on other Nucleos too
00004 
00005 //Connect as follows:
00006 //RFID pins        ->  Nucleo header CN5 (Arduino-compatible header)
00007 //----------------------------------------
00008 //RFID IRQ=pin5    ->   Not used. Leave open
00009 //RFID MISO=pin4   ->   Nucleo SPI_MISO=PA_6=D12
00010 //RFID MOSI=pin3   ->   Nucleo SPI_MOSI=PA_7=D11
00011 //RFID SCK=pin2    ->   Nucleo SPI_SCK =PA_5=D13
00012 //RFID SDA=pin1    ->   Nucleo SPI_CS  =PB_6=D10
00013 //RFID RST=pin7    ->   Nucleo         =PA_9=D8
00014 //3.3V and Gnd to the respective pins                              
00015                               
00016 #include "mbed.h"
00017 #include "MFRC522.h"
00018 
00019 // Nucleo Pin for MFRC522 reset (pick another D pin if you need D8)
00020 #define MF_RESET    D8
00021 
00022 DigitalOut LedGreen(LED1);
00023 
00024 //Serial connection to PC for output
00025 Serial pc(SERIAL_TX, SERIAL_RX);
00026 
00027 MFRC522    RfChip   (SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS, MF_RESET);
00028 
00029 int main(void) {
00030   pc.printf("starting...\n");
00031 
00032   // Init. RC522 Chip
00033   RfChip.PCD_Init();
00034 
00035   while (true) {
00036     LedGreen = 1;
00037 
00038     // Look for new cards
00039     if ( ! RfChip.PICC_IsNewCardPresent())
00040     {
00041       wait_ms(500);
00042       continue;
00043     }
00044 
00045     // Select one of the cards
00046     if ( ! RfChip.PICC_ReadCardSerial())
00047     {
00048       wait_ms(500);
00049       continue;
00050     }
00051 
00052     LedGreen = 0;
00053 
00054     // Print Card UID
00055     pc.printf("Card UID: ");
00056     for (uint8_t i = 0; i < RfChip.uid.size; i++)
00057     {
00058       pc.printf(" %X02", RfChip.uid.uidByte[i]);
00059     }
00060     pc.printf("\n\r");
00061 
00062     // Print Card type
00063     uint8_t piccType = RfChip.PICC_GetType(RfChip.uid.sak);
00064     pc.printf("PICC Type: %s \n\r", RfChip.PICC_GetTypeName(piccType));
00065     wait_ms(1000);
00066   }
00067 }