对与单片机常用的功能看门狗，本程序用vhdl硬件语言实现次功能。

看门狗，出于对单片机运行状态进行实时监测的考虑,产生的一种专门用于监测单片机程序运行状态的芯片-Watchdog, the microcontroller running for real-time monitoring considerations, produced a special run for monitoring the status of the chip microcontroller program

基于单片机的温度浓度周期测试时间与空气中的浓度测量相比，发送数据！温度不断更新！看门狗定时器！计数器T0等功能-Microcontroller-based temperature concentration cycle testing time compared with air concentration measurement sent! Temperature is constantly updated! Within the watchdog timer! Counter t0