使用stm32f407实现RFID简单签到功能，另外可实现消费、充值等功能扩展。(Using stm32f407 to achieve RFID simple sign in function, in addition to achieve consumption, recharge and other functions expansion.)

RFID学生签到系统，运行在Windows CE平台，可以实现简单的签到功能(RFID student attendance system, running on Windows CE platform, you can achieve a simple sign function)