51单片机的FIFO(先入先出)循环队列实现（已在串口通信中实际应用）-51 single-chip FIFO (FIFO) circular queue (already in the practical application of the serial communication)

51单片机的FIFO(先入先出)循环队列实现-51 single-chip FIFO (first-in, first-out) circular queue to achieve