基于市场常见的51单片机，正合了数码管、LED、数模、模数等程序，无需多次下载，程序自动执行，适合检测51开发板的大部功能是否正常。-Based on the market common 51 single-chip, is a combination of digital tube, LED, digital module, modulus and other procedures, without the need to download many times, the program au