On 07/26/2015 06:12 AM, tony duell wrote:

Remember when USB was referred to as the Useless Serial Bus after
it was introduced? I think it was a solid 1-2 years after it was
introduced that I began to notice peripherals designed for it.

I still call it 'Useless Serial Botch' most of the time. It's not a
bus, after all.


The first USB devices were utterly terrible--I've got a few that work only with certain controllers--modern controllers are absolutely blind to the things.

It seems to me (and I'll defer to more experienced hands) that USB is not wonderful for single- or low-count byte transfers; that the negotiation overhead makes short transfers rather problematic, particularly where the topology involves multiple hubs. In other words, USB is well-suited to block transfers.

Is this a fair assessment?

And the proliferation of unofficial VID and PIDs seems to be an issue, particularly with Chinese-origin devices. "Squatting" seems to be a practice also: VID 0001 = Fry's Electronics; 0004 = Nebraska Furniture Mart--really? I've found Chinese USB devices squatting on the Linksys VID, with a non-Linksys PID.

Really, it's a mess.

--Chuck

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