利用labiew主程序实现单片机与主机的串口通信，实现温度的采集，然后通过比例积分算法的控制，输出一定占空比的波形驱动电机，实现恒温水箱的控制系统-MCU and host serial communication labiew main program, to achieve the acquisition of temperature, and then through the control of the proportional integral algorithm, the outpu

高精度乘法，使用STC90C516单片机，可以计算出1-2000的阶乘，串口9600波特率输出-Precision multiplication, use STC90C516 microcontroller, can calculate the factorial 1-2000, 9600 baud serial output