LJD-44b0XDVK开发板源代码,具有启动、引导，下载、烧写，设置日期、时间，设置工作频率等多种功能，并且支持各种参数的存储和自动调用。-LJD-44b0XDVK development board source code, with start guide, download, programmer, set the date, time, set up a variety of functions such as operati