Products > Test Equipment

SainSmart DDS120 & DDS140 USB Oscilloscope

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doctormord:
Nice, keep it up. :)

merbanan:
I took a picture of a 1kHz triangle wave. And it is easy to see here that I am missing every other buffer.

doctormord:
Hmm, isn't it async as well?

Nice one anyway. I wonder if "readbulkdata" is caring for the buffers itself. And what will happen, if you sample both channels, available buffer would half for each channel I guess.

merbanan:
I have now tested the sainsmarts bulk endpoint 0x86 and I could not get it working. I did get a sane transfer count when running the test120 application and using it in 2.4MHz and 2.4kHz mode. In both cases I got close to double Ms rate. But when choosing "50" MHz mode I max out at ca 7.5Ms/s.  Either the interrupt read is not working correctly with regards to some buffer handling or bulk reads are needed to be able to get more data. I am more and more convinced that a custom firmware is needed to get reliable data from the hardware.

doctormord:
Maybe it's a setup issue. Have you checked the other .dll functions? I'm not sure if they share the dll code for both the DDS120/140.

Have you had a look into the source of "leidioskop", it should be available here in the thread.

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