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{| width="50%" |- | width="20%" style="color: gray;" | Author | Ben Rowland and STibor |- | width="20%" style="color: gray;" | Version | 2.0 (Release) |- | width="20%" style="color: gray;" | Category | Wireless |} ==[[File:Component Icon 3f8d29a6_40a6_4d5e_a254_190c86d9ebb7.png|Image]] RFID (MFRC522) component== Functions designed to work with the MFRC522 contactless reader IC. The MFRC522 supports all variants of the MIFARE Mini, MIFARE 1K, MIFARE 4K, MIFARE Ultralight, MIFARE DESFire EV1 and MIFARE Plus RF identification protocols. ==Examples== Here is a basic example program that shows various ways the MFRC522 RFID reader can be used. A switch is connected to pin A0, when the switch is active the program will read the ID of the RFID tag and display it on the LCD. When the switch is not active the program will check the ID of a RFID tag with a pre-programmed ID, if the ID bytes match then the LCD will display a Welcome message and the LED connected to pin A1 will light for two seconds. This pin could then be used to drive a solenoid and open a security door. {{Fcfile|MFRC522Example.fcfx|MFRC522 Example}} ==Downloadable macro reference== ===<span style="font-weight: normal;"><u><tt>WriteBlock</tt></u></span>=== Writes the contents of the 16-byte data buffer to the RFID block. The data comes from the DataBuffer which can be set using the WriteDataBuffer macro. Returns 0 for a succesful write. '''Parameters''' :[[Variable Types|BYTE]] ''BlockAddress'' '''Return value''' :[[Variable Types|BYTE]] ===<span style="font-weight: normal;"><u><tt>ReadDataBuffer</tt></u></span>=== Reads a byte from the receive data buffer. ID locations are 0-4 Data locations are 0-15 '''Parameters''' :[[Variable Types|BYTE]] ''Index'' ::Locations 0-15 '''Return value''' :[[Variable Types|BYTE]] ===<span style="font-weight: normal;"><u><tt>AntennaOff</tt></u></span>=== Switches off the RFID antenna to save power. The antenna must be switched on again before communicating with an RFID tag. '''Parameters''' :''This macro has no parameters'' '''Return value''' :''This call does not return a value'' ===<span style="font-weight: normal;"><u><tt>ReadBlock</tt></u></span>=== Reads the contents of the 16-byte data buffer block on the RFID. The receive data is stored in the data buffer and read back using the ReadDataBuffer macro. Returns 0 for a succesful read. '''Parameters''' :[[Variable Types|BYTE]] ''BlockAddress'' '''Return value''' :[[Variable Types|BYTE]] ===<span style="font-weight: normal;"><u><tt>SelectTag</tt></u></span>=== ''<span style="color:red;">No additional information</span>'' '''Parameters''' :[[Variable Types|BYTE]] ''Ser0'' :[[Variable Types|BYTE]] ''Ser1'' :[[Variable Types|BYTE]] ''Ser2'' :[[Variable Types|BYTE]] ''Ser3'' :[[Variable Types|BYTE]] ''Ser4'' '''Return value''' :[[Variable Types|BYTE]] ===<span style="font-weight: normal;"><u><tt>WriteDataBuffer</tt></u></span>=== Writes a value to the 16-byte data buffer ID locations are 0-4 Data locations are 0-15 '''Parameters''' :[[Variable Types|BYTE]] ''Index'' ::0-15 :[[Variable Types|BYTE]] ''Data'' '''Return value''' :''This call does not return a value'' ===<span style="font-weight: normal;"><u><tt>Auth</tt></u></span>=== This command manages MIFARE authentication to enable a secure communication to any MIFARE Mini, MIFARE 1K and MIFARE 4K card. All keys are set to FFFFFFFFFFFFh at chip delivery. The authentication is described in the MFRC522 datasheet section 10.3.1.9. '''Parameters''' :[[Variable Types|BYTE]] ''AuthMode'' ::PICC_CMD_MF_AUTH_KEY_A or PICC_CMD_MF_AUTH_KEY_B :[[Variable Types|BYTE]] ''BlockAddress'' ::The block number :[[Variable Types|BYTE]] ''Key0'' ::Crypteo key to use - Byte 0 :[[Variable Types|BYTE]] ''Key1'' ::Crypteo key to use - Byte 1 :[[Variable Types|BYTE]] ''Key2'' ::Crypteo key to use - Byte 2 :[[Variable Types|BYTE]] ''Key3'' ::Crypteo key to use - Byte 3 :[[Variable Types|BYTE]] ''Key4'' ::Crypteo key to use - Byte 4 :[[Variable Types|BYTE]] ''Key5'' ::Crypteo key to use - Byte 5 :[[Variable Types|BYTE]] ''Ser0'' ::UID Byte 0 :[[Variable Types|BYTE]] ''Ser1'' ::UID Byte 1 :[[Variable Types|BYTE]] ''Ser2'' ::UID Byte 2 :[[Variable Types|BYTE]] ''Ser3'' ::UID Byte 3 '''Return value''' :[[Variable Types|BYTE]] ===<span style="font-weight: normal;"><u><tt>AuthOff</tt></u></span>=== Resets the authentication allowing a new communications tasks to work. '''Parameters''' :''This macro has no parameters'' '''Return value''' :''This call does not return a value'' ===<span style="font-weight: normal;"><u><tt>AntennaOn</tt></u></span>=== Switches on the RFID antenna. Called as part of the Initialise macro. '''Parameters''' :''This macro has no parameters'' '''Return value''' :''This call does not return a value'' ===<span style="font-weight: normal;"><u><tt>Compare</tt></u></span>=== Compares the read address from the Check macro with a fixed 5 bytes address. Returns 0 if the addresses match. '''Parameters''' :[[Variable Types|BYTE]] ''Add0'' :[[Variable Types|BYTE]] ''Add1'' :[[Variable Types|BYTE]] ''Add2'' :[[Variable Types|BYTE]] ''Add3'' :[[Variable Types|BYTE]] ''Add4'' '''Return value''' :[[Variable Types|BYTE]] ===<span style="font-weight: normal;"><u><tt>Initialise</tt></u></span>=== Initialises the RFID module ready for interaction with RFID tags. '''Parameters''' :''This macro has no parameters'' '''Return value''' :''This call does not return a value'' ===<span style="font-weight: normal;"><u><tt>Check</tt></u></span>=== Checks to see if a RFID tag is present. Returns 255 if RFID tag responds to the request. Returns 0 for no response. '''Parameters''' :''This macro has no parameters'' '''Return value''' :[[Variable Types|BYTE]] ==Simulation macro reference== ''This component does not contain any simulation macros'' ==Property reference== <span style="font-weight: normal;"><u>Channel</u></span> This property is of type ''Fixed list of ints'' and can be referenced with the variable name ''CHANNEL''. ''<span style="color:red;">No additional information</span>'' <span style="font-weight: normal;"><u>MISO / SDI</u></span> This property is of type ''Single digital pin'' and can be referenced with the variable name ''MISO''. SPI Data In Pin <span style="font-weight: normal;"><u>MOSI / SDO</u></span> This property is of type ''Single digital pin'' and can be referenced with the variable name ''MOSI''. SPI Data Out Pin <span style="font-weight: normal;"><u>SCK</u></span> This property is of type ''Single digital pin'' and can be referenced with the variable name ''CLK''. SPI Serial Clock Pin <span style="font-weight: normal;"><u>SS</u></span> This property is of type ''Single digital pin'' and can be referenced with the variable name ''CS''. SPI Chip Select Pin <span style="font-weight: normal;"><u>Reset</u></span> This property is of type ''Single digital pin'' and can be referenced with the variable name ''reset''. MFRC522 Reset Pin

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