Possible reasons why there is no voltage in the corresponding channel, but the ADC value is changing greatly and is not equal to 0

Today I share a phenomenon caused by my carelessness , I was doing it before ADC When , Single channel ( Rule group ) And software trigger , Find out ADC The collected values are constantly changing , And I didn't input the corresponding voltage , In theory ,ADC The output value should be 0(+10– There is a deviation ). But its value is not equal to 0 And constantly changing , So the investigation came down and found ADC The channel of is incorrectly input during initialization ...., That's why ADC The acquisition pin is wrong , Therefore, its voltage value has been changing .....

Sharing this example is to think that if other partners encounter this kind of problem , We can learn from its phenomenon . Whether there is the same place as me , You can refer to my example for corresponding search .

My level is limited , The above information is for reference only , If there are mistakes and irregularities , Your advice are most welcome .
Besides, it's not easy to create , Don't copy , If it helps you, I hope you can like it , thank you ~