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Easiest way to collect some data @50MB/s and dump to computer

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ataradov:
You need to check how the interface is actually configured. The useful mode for FIFO is with external clock, so if you don't supply the clock, it won't do anything.

magic:
That's the thing, I was asking if fx2pipe (and its firmware) can be given any options to set the chip up so that it simply records data without looking at external clock or anything, like sigrok does. I also tried without any options, 0 bytes received again. Also output, nothing happened either.

SuperFungus:
I was using it with a synchronous interface and supplied  a clock.

Have you tried any of the internal ifclk options described in the help? https://www.triplespark.net/elec/periph/USB-FX2/software/fx2pipe.html

Harvs:
I've tried fx2pipe quickly this evening with a "saleae" clone board. 

Same result, no data transfered, regardless of option (tried all the internal clock options and "async" option.)

However in the troubleshooting section, it links to another page:
https://www.triplespark.net/elec/periph/USB-FX2/software/io_examples.html

In the benchmark example (which I'm guessing is what the -I option is all about), there's a few pins that must be tied high and low for it to work. This may be worth looking at, I haven't had the chance to do it.

SuperFungus:
That link looks promising, I'm willing to bet that is the issue.

Obviously my memory of how this all works is a little fuzzy.  At the time I had recently read the FX2 datasheet and app notes and had a much better sense for what needed to be done to drive the FIFO's in the FX2...

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