AD7887使用5V供电
CS==MCU IO
SCLK==MCU IO
DIN==MCU IO
DOUT==MCU IO
VDD==5V
AIN1/VREF==5V
AIN0==模拟信号输入
只需发16个时钟信号就可以获取到ADC数据了吗？程序如下：发送命令为0x21，请问是否还需要进行其他的配置，只需要重复调用此函数应该可以获取到ADC数据了，目前采集不到ADC的数据，请大神技术支持一下！
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