ymodem 文件传输工具，专用于单片机程序下载
该项目是一个脱机烧录器，主控使用esp32，使用微信小程序通过蓝牙连接到烧录器发送烧录固件进行产品固件烧录。
基础常用贴片封装库，从官方库修改过来的，符合嘉立创封装制作标准
uart hex 一些方法类
单片机固件程序 [.hex] [.bin] 合并与加密工具
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