Cotex-M3驱动射频芯片RC531硬件电路，采用SPI总线，具体功能已实现，有实际参考价值。-Cotex-M3 driver RF chip RC531 hardware circuit, using SPI bus, the specific function has been achieved, are of practical value.

the tool is keil which is stm32rfid.v0.0 used for as3992 and stm32f103