I picked up one of those aliexpress "Saleae logic analyzers" a while back. It's obviously a knock-off, but it works really well, though I've never tried to use

I picked up one of those aliexpress "Saleae logic analyzers" a while back. It's obviously a knock-off, but it works really well, though I've never tried to use it at its advertised max supported frequency (2MHz), most of the stuff I do is < 1MHz.