PIC18f4550-检测电位器是否连接

大家好！这是我的第一个线程，所以请为任何类型的错误道歉，如我的情况不好，因为我的英语不好。所以我的问题是，有没有一种方法可以检测一个人是否通过软件连接了电位器？我正在开发一个板，有8个电位器连接，并不总是将它们连接起来，如果其中一个没有连接，我不想显示浮动值，对于这种情况，我想把这个值锁定为0。我想要一些即插即用，如果有人连接电位计而不重置板，它会开始读取和显示值。有人能帮助我吗？我试着把针脚放高，然后做一个ADC读，然后把它放低，再读一遍，我知道如果不是电位器连接，我会读到像1020和3一样的东西，如果有一个连接，我会读出不同的值，但是如果有人让电位器，我就害怕烧掉我的芯片。在低位或高位，还是不会发生这种情况？不幸的是，我只能做软件更改，硬件更改不再是可用的，因为我的板卡已经制造好了。谢谢大家！
                    
                    
               
                                                                                      以下为原文

                                                                            Hello guys!

This is my first thread, so please sorry for any kind of mistake, such in bad explication of my situation as for my bad english.

So here is my question, is there a way I can detect if a person did connected a potentiometer or not by software? I'm developing a board that have 8 potentiometer connections, and not always will they all be connected, and if one of them is not connected I don't wanna floating values displaying, for this situation I wanna lock the value to 0. And I wanna some kind of plug and play, if someone connect a potentiometer without reset the board, it would start read and displaying the values.

Can someone help me?

I tried to put the pin high and do a ADC read, and then put it low and read again, I know if ther is not a potentiometer connected I will read something like 1020 and 3, and if is there one connected I will read diferent values, but I have a fear to burn my chip if the person let the potentiometer in the low or high position, or this won't happen?

Unfortunately, I can do only software change, hardware changes is no longer avaliable because my boards is already manufactured.

Thanks all you guys!