一些实用的单片机设计方案，usb接口，OFDM，串行通信发射机，电子密码锁，智能小车，点阵，电子时钟-Practical single-chip design, usb interface, OFDM, Serial communication transmitters, electronic locks, intelligent car, lattice, electronic clock

LED 点阵点亮 对输入时钟进行分频，依次点亮相应的LED 灯-LED 点阵点亮 对输入时钟进行分频，依次点亮相应的LED 灯