请教一下,28035的AD采样异常,A7口已经拉到地上了,示波器和万用表测出来是0V,为什么AD的采样值一直在飘2000-4096乱跳?
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几个地方需要确认下:
1. 对于ADC的参考,你用的而是内部的还是外部的?示波器看下是不是稳定的。
2. 看下28035的供电是不是稳定的。
3. 其他通道的ADC也是这样吗?