利用状态机实现对TLC549的采样控制，实验时可调节电位器RW1（在开发板底板左下角），改变ADC的模拟量输入值，数据采集读取后在数码管上显示。-Using state machine implementation of eight bits sampling control, adjustable potentiometer RW1 experiments in development board (bottom left corner), change the ADC analog inpu