USB analyser is aiming at using a Cypress FX2 together with sigrok and two 74HC595 to increase the sampling rate to 48 MHz.

PCBs have arrived!

Soldering started… FX2 to come next… BUG! LM1117 and LT1129 have different pinouts (both SOT-223 3.3V LDOs)… and I used a mixed one?!?

Here's a list of them with corrections:

Here a few impressions:

Now it works! Look at here! Well, at least in most cases. IMHO the timing in the decoder should be adjusted slightly.

S/PDIF decoding! Well, it's not what it is initally meant for, but for another project, I wanted to look at S/PDIF outputs. This is how one may record some two seconds of digital audio:

sigrok-cli --driver usbanalysser --samples=100M -P spdif:data=1 -A spdif=samples | grep Audio | awk '{printf("%06X\n",$2)}' |  xxd -r -p  | sox -t raw -r 48k -e signed -b 24 -c 2 -x - test.wav

using this simple set-up, consitsting essentially of a digital audio receiver (ORJ-8) connected (this Mac hast a TOSLINK output):

• sigrok is what I used with its fx2lafw FX firmware and a modified driver to unmangle the bits