JYE Tech Forum

I am trying to transfer waveform data from the DSO Shell to my computer.
I am using a CP210x microUSB convertor board.

The board seems to be working properly and I can transfer some data including settings and measurements.
But when I try to transfer a waveform, I only get the first ~505 samples.
This happens no matter how the data is displayed on the screen.
The last sample I get has all the index, time, and data value information. So I don't think the read is being prematurely truncated.

I have tried changing timeout and buffer sizes in my program.
I am using Microsoft Visual C++ routines CreateFile, SetCommState, SetCommTimeouts, WaitCommEvent, and ReadFile functions.

Do you have any suggestions on what I might be doing wrong?

I have seen indications online that others are able to read the entire 1024 sample data buffer.

Thanks
Bill Boyer

It is suggested to use another tool to capture the data and see if it is complete. For example, this is one we frequently use http://www.jyetech.com/Support/teraterm-4.80.exe .

I had adapted my code from an example I found online. This code read the data byte-by-byte with calls to ReadFile.

I changed the code to read the entire buffer in one call. This works. So I am okay now.

I don't know why the first method didn't work. I could imagine a timing problem with the repeated reads.
But I was getting all the first half of the waveform with nothing missing as far as I could tell.