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STM32F769 RFID Door Lock

An STM32F7xx-compatible RFID-RC522 project and library using FreeRTOS (CMSISv2) as a base, UART for serial communication / debugging, SPI for communication with the reader and a servo motor for simulating a door lock.

Running the project

  1. Have STM32CubeIDE installed
  2. Clone the project: git clone https://github.com/erazemk/stm32f7-mfrc522.git
  3. Launch .project (this will import the project into STM32CubeIDE)

Connecting the RFID-RC522 module

The following is the default pinout, but you can change it in the code if needed.

RFID-RC522 STM32F769NI
SDA (SS) D10
SCK (SCLK) D13
MOSI D11
MISO D12
IRQ /
GND GND
RST 3.3V
3.3V 3.3V

Connecting the Servo motor

SG90 STM32F769NI
VCC 5V
DATA D6
GND GND

Debugging using UART (Serial Port)

The board automatically prints useful info to serial over UART. To read it use a program like tio (or screen or PuTTY) to connect to the board's USB port (usually COMx on Windows and /dev/ttyACMx on Linux).

With a program like tio the defaults are enough (so tio /dev/ttyACM0), but here are the specifics:

  • Baud rate: 115200
  • Data size: 8 bits
  • Parity: None
  • Stop bits: 1

Attribution

This project uses a custom MFRC522 library, parts of which were taken from or inspired by the following libraries: