Incomplete Down Amplitude Sweeps

[ehuegler]

When sweeping amplitude, downward sweeps will not be longer than the previous upward sweep. For example, if you sweep up from 0% to 50%, then try to sweep down from 100% to 25%, the downward sweep you get will only go from 75% to 25.

This seems to be specific to amplitude sweeps; frequency sweeps do not have the same issue.

There also seems to be a related issue that the downward amplitude sweep is triggering before the profile pin goes low. Not sure if that is a separate issue.

[ehuegler]

[dihm]

Wow, that is really annoying. Maybe amplitude sweeps aren't actually going to be a fully functioning feature after all. I suppose it is a lower priority, for us at least, than getting frequency sweeps working. This will be doubly true if we get single tone table mode working as well (as a decent fall-back method for amplitude sweeps). With some luck, you should have a decent frequency measurement soon (KJ should be doing that next) then you can ditch amplitude sweeps entirely for the time being.

[ehuegler]

After further testing I have concluded that the solution in #32 definitely should not work, and in some situations it actually does not. If the time steps are set to anything other than a clock cycle then downward sweeps do not happen at all.

That might not be a huge problem though because this means it works for the highest resolution sweeps. It only causes an issue if you try to make a sweep that last over a longer period of time. Will have to decide if that is preferable to not being able to sweep as far as you want.