Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
hachyderm.io is one of the many independent Mastodon servers you can use to participate in the fediverse.
Hachyderm is a safe space, LGBTQIA+ and BLM, primarily comprised of tech industry professionals world wide. Note that many non-user account types have restrictions - please see our About page.

Administered by:

Server stats:

9.7K
active users

hachyderm.io: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.3.5

Public
Foone🏳️‍⚧️

I wonder if there'd be any electrical problems with wiring together two picos as USB devices, which are both plugged into the same computer.

Like it's obviously okay if they're on the same hub, but different hubs? I don't know but I wouldn't be surprised if that's an issue.

Public *
Foone🏳️‍⚧️

actually, I wonder... is it possible to have a USB device identify as multifunction, but those functions are "two separate keyboards"?

Cassandrich

@foone Semantically as single multifunction device, I dunno. But it's always possible to have the device be "USB hub" with 2 virtual keyboards connected.

Dec 23, 2024, 08:52 AM·Public·Web
0boosts·3favorites
Quiet public
Cassandrich

@wonka @foone Is there a hard limit on number of hubs?

Quiet public
Cassandrich

@wonka @foone I mean, if there is, there's probably some awful way to do "USB connected PCIe bus interface" and "USB controller on PCIe" to nest it further.. 🤪

Quiet public
Jernej Simončič �

@dalias @wonka @foone IIRC, with USB2 you can't have more than 7 hubs (and a total of 127 devices). No idea about USB3, but I know that it's limited to 31 devices.

Quiet public
Cassandrich

@jernej__s @wonka @foone That seems like a limitation of the host controller implementation not the actual bus. The bus isn't really capable of knowing the total number of devices AFAICT (but could know the hub depth as part of addressing).

Quiet public
Jernej Simončič �

@dalias @wonka @foone A quick search found this and this which suggests that the maximum number of hubs you can chain is actually 5; there are 7 tiers of USB devices, where the host controller and device itself count as a tier.

Plugable Support · Too many USB hubsI get this error with my Plugable docking station. It does not happen with my Surface Dock 2. It does not happen with my Dell dock. I’ve tested all three docking stations with the same laptop, the Surface Laptop Studio. I do have a weird kind of set up. I have a small USB hub under the front edge of my desk that’s currently plugged into a different USB hub, which is plugged in to my KVM switch. I know, I know… that’s a lot of USB hubs. I wanted to be able to make it so that no matter what is ...
ExploreLive feeds
About