本系统以直流电流源为核心，MSP430F149单片机为控制系统，输出数字信号，经过D/A转换器（TLV5638）输出模拟量，将实际值输出到单片机，由单片机进行比较调整，控制电流输出-This system DC current source to the core, MSP430F149 microcontroller for the control system, the output digital signal through D/A converter (TLV5638) analog output, the actual value of the output to the microcontroller, the microcontroller compares adjustment, control current output