恒温控制

采集温度

通过rs232上传温度到上位机

等待接受上位机的指令

判断环境温度与恒温温度大小

采用pid算法

通过iic总线改变加热pwm的占空比

-Temperature control the temperature through the acquisition rs232 uploaded to the host computer to wait for the temperature to accept host computer instructions to determine the size of the ambient temperature and constant temperature using pid algorithm iic bus, changing the heating duty cycle pwm