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    p8
00021 
00022 DigitalOut LedGreen(p24);
00023 
00024 //Serial connection to PC for output
00025 Serial pc(p9, p10);
00026 
00027 MFRC522    RfChip   (p11, p12, p13, p14, MF_RESET);
00028 
00029 int main(void) {
00030   pc.baud(9600);
00031   
00032   pc.printf("starting...\n");
00033   
00034   wait(1);
00035 
00036   // Init. RC522 Chip
00037   RfChip.PCD_Init();
00038 
00039   while (true) {
00040     LedGreen = 1;
00041 
00042     // Look for new cards
00043     if ( ! RfChip.PICC_IsNewCardPresent())
00044     {
00045       wait_ms(500);
00046       continue;
00047     }
00048 
00049     // Select one of the cards
00050     if ( ! RfChip.PICC_ReadCardSerial())
00051     {
00052       wait_ms(500);
00053       continue;
00054     }
00055 
00056     LedGreen = 0;
00057 
00058     // Print Card UID
00059     pc.printf("Card UID: ");
00060     for (uint8_t i = 0; i < RfChip.uid.size; i++)
00061     {
00062       pc.printf(" %X02", RfChip.uid.uidByte[i]);
00063     }
00064     pc.printf("\n\r");
00065 
00066     // Print Card type
00067     uint8_t piccType = RfChip.PICC_GetType(RfChip.uid.sak);
00068     pc.printf("PICC Type: %s \n\r", RfChip.PICC_GetTypeName(piccType));
00069     wait_ms(1000);
00070   }
00071 }