Dual USB device mode on Teensy 4.0

M

mundungus

Well-known member
Hey All,

Is there library support for dual USB on Teensy 4.0, where both USB ports are in device mode?

I want to connect it to two PCs and accept commands from both.
 
According to the USB topology, a USB device is not allowed to be connected to 2 hosts.
If you want some apparatus that connects to 2 hosts, you have to use 2 separate USB devices [Teensy's] and exchange signals between those 2 Teensy's.

Paul
 
In theory the 2nd USB port could also run in device mode. As a practical matter, we just don't currently have much (hardly any) software support for that usage. WMXZ published some code for Teensy 3.6 to do this in limited ways.

USB device support on the 2nd port is indeed on a long list of requested features. But I can't offer any time frame (other than "not soon") or even say whether this work will ever happen.
 
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