I am using Cypress FX2. After capturing a session, I want to save the data on the disk.
This works only if all 16 channels are captured. If I capture, say, only four channels, I get error "Failed while saving: invalid argument".
Interestingly, if I capture all channels, and then deselect all but four, it saves only those four. But if I capture only four, there is no workaround for saving.
This is extremely annoying, as I cannot afford to capture all channels as I need very high sampling.
Created attachment 797 [details]
Full text of error:
Failed to save session.
Error while saving: invalid argument
The error in logging is
sr: output/srzip: Unexpected unit size, discarding logic data.
This obviously has to do with unit size; for my product with 16 channels unit size is by default 2. My speculation is that if I use only channels in 1-8 range, pulseview saving module expects unit size 1, but is returned unit size 2 or vice versa.
Interestingly, if I use at least one channel in the 9-16 range, everything is fine, regardless if I use any channel in 1-8 range. However in this case higher frequency sampling is no longer working. Sampling for one channel in 1-8 range is much higher than sampling for one channel in 9-16 range, which is really strange.
The solution is for program to ignore unit size mismatch.
OK, this project is obviously dead. So I will respond in part to my bug report so that others know the solution.
How to use the Lcsoft Mini Board (16 channels):
1. If you only sample the channels of the first set (D0-D7), the highest sampling frequency is 24 MHz. If you also sample the channels of the second set (D8-D15), the highest sampling frequency drops to 12 MHz.
2. If you only sample the channels of the first set, PulseView cannot save: "Failed to save session. Error while saving: invalid argument". The workarounds are:
a. Sample at least one channel of the second set.
b. Sample only the channels of the first set, but save the results as Raw binary logic data. Open a new session and import Raw binary logic data (you must specify the number of channels and the sampling rate). Now the data can be saved normally.