ADC读取流量为0V

大家好，我正在寻找一些关于我从CY8CKIT-050的Delsig ADC组件获得的读数的说明。
我已经附上了这个项目，有一些额外的东西与我一起进行DMA和Bootloader的实验，但是ADC只是在单端模式下在测试套件上的车载锅上阅读。输入范围设置为VSSA到VDDA，缓冲器模式是“旁路缓冲器”，但在任何缓冲模式下都存在问题。
我发现，当我碰到锅的低端，0V，我的ADC值出现下溢（？）0V输入结果值接近0xFFFF。电压不是负的，至少根据我的多米测量。有人能确切地解释为什么会发生这种情况，我需要做些什么来补救这个问题，所以0V的输入结果是0x000？
提前感谢。
Bootloader测试
1.4兆字节



     以下为原文
  Hi all, I'm looking for some clarification on the readings I'm getting from the DelSig ADC component on a CY8CKIT-050.

I have attached the project, there's some extra stuff going on with me experimenting with DMA and a bootloader, but the ADC is simply reading from the onboard pot on the test kit in single ended mode.  Input range is set to VSSA to VDDA and the buffer mode is "Bypass Buffer" but the problem exists on any of the buffer modes.

What I'm finding is that when I hit the low end of the pot, 0V, my ADC value is appearing to underflow(?).  0V input results in values close to 0xFFFF.  The voltage is not going negative, at least according to my multi-meter measurement.  Can someone explain exactly why this is occurring, and what I would have to do to remedy the issue so 0V input results in 0x0000?

Thanks in advance.

•   Bootloader Testing.cywrk.Archive01.zip 1.4 MB