从CRM 接口表中读取工单，生成随机鉴权码并写入小灵通，实现小灵通写码，主要有串口通信编程、动态链接库调用、数据库读写等功能(From the CRM interface table, we can read jobs, generate random authentication codes and write PHS, and realize PHS coding, mainly including serial communication programming, dynamic link