“电压、频率采集设备”能够实现测量信号频率和电压，修改、存储工作参数，记录、查询事件等功能，系统由按键单元、ADC采集单元、显示单元、数据存储单元组成，为蓝桥杯单片机组赛题("Voltage and frequency acquisition equipment" can realize the measurement of signal frequency and voltage, modify, store th