Single teensy multiple com ports ?

[djamu]

Hello all,

Can a teensy / host PC be forced to use multiple COM ports on a single usb connection ? ( windows )

The reason I'm asking is for use with Unity, I'm logging multiple streams onto a 3.6, for real time purposes I'd like to stream those onto separate COM ports which would make it easier to parse in Unity.
The port numbers themselves wouldn't matter that much.

> for example state of switches on COM3 / analog on COM4 etc ...

In Linux I probably could write a demultiplexer, that splits a real com port to any virtual, given I insert a target port ( for example 1st byte / line ) into the serial stream.
Another option would be to use a NIC, and multiple ports...
Unfortunately I'm stuck with Windows for this project ( don't ask .... )

Anyone tried this ?

 

[PaulStoffregen]

While this is theoretically possible by hacking the USB code, in practice that would be quite a lot of work!

If you can use MIDI for your other data streams, selecting Serial+MIDI in the Tools > USB Type menu would be the easy way. The latest version supports virtual MIDI cables too.

 

[djamu]

Thx Paul for your prompt reply,

Midi is indeed an option I overlooked, by hacking USB code, you mean on the teensy side or PC side ?

 

[PaulStoffregen]

by hacking USB code, you mean on the teensy side or PC side ?

on the Teensy side, specifically in usb_desc.h, usb_dev.c and usb_serial.c, if you're inclined to look at the code you'd need to edit.