Sebastian Zagrodzki comments

Results 6 comments of


                                            Sebastian Zagrodzki

Problems with first x samples

FWIW, I've documented the reverse-engineered calibration protocol here: https://github.com/zagrodzki/goscope/blob/master/docs/calibration.txt But that "calibration" sucks, it only sets the 0 point, doesn't even adjust scale.

Fix FIFO reset sequence

I'm testing with a 1MHz triangle wave, sampled at 24Msps with a single channel, expecting no sudden changes in value. I'm using a single libusb transfer with 8 iso packet...

Fix FIFO reset sequence

actually, let me test it once more, I only merged your particular commit. I'll try again with the .hex from your repo.

Fix FIFO reset sequence

yup, with your .ihx it's the same, 60% of the time at 12Msps I see an abrupt change after 4kB.

Fix FIFO reset sequence

FTR, this is how the data from the scope looks like, I'm capturing first 12k samples or so, at 24Msps, the wave is a 125kHz triangle 10Vpp. You can see...

Fix FIFO reset sequence

@jhoenicke will you merge this branch? I think a better reset sequence is better than unsubmitted perfect sequence :)