LED显示实验：主要掌握单片机的基本VO操作，主要是指如何操作端O。其中含有将操作端O做为8位寄存器寻址方式的操作和按位寻址的操作方式，另外还包含有软件延时：预顶义，存贮单元硬件描术表的建立。 -LED display experiment: the main master the basic VO MCU operation, mainly refers to how end of O. O which contains the operating side as the 8-bit register addressing modes of operation and by-bit addressing mode of operation, the software also includes delay: Top Pre-justice, storage units surgery table describing the establishment of the hardware.