单片机控制数字电位器x9313的编程。本编程结合运算放大器设置成一个可调电源，通过单片机控制电位器的阻值修改电位器两端电压从而达到数控电源的效果。电压值可通过单片机外界LCD显示。(Programming of digital potentiometer X9313 controlled by mcu. This program is combined with operational amplifier set into an adjustable power supply, through the MCU control potentiometer resistance, modify potentiometer voltage at the end, so as to achieve the effect of numerical control power supply.Voltage value can be displayed by external LCD of mcu.)