The function of the acquisition module is to convert the current and voltage signals on both sides of the converter into voltage signals that can be sampled by DSP in real time. The main control chip DSP28335 selected in this design uses a voltage of 3.3V to supply power to peripherals, and the sampling voltage range of its ADC channel is 0~3V. Therefore, the voltage and current signals processed by the sampling circuit should be within 0~3V. The interleaved bidirectional converter has two ports, which need to detect two voltages and two currents.