Teensy USB options 1. Mass storage device, 2. USB pass through?

Status
Not open for further replies.
J

jc179

New member
Hi

I've been directed here as a possible option for a few projects im working on. I am interested in using the Teensy as a USB mass storage device, I have some picky hardware that only works with certain devices (Eg VID/ PID / Model # / SN etc). I would like to [experiment] with Teensy and see if I can have it behave as that device. From doing a little research it seems possible to change the VID and PID on the teensy to match what's needed, but is there any option to add additional USB parameters that could be picked up by the host system? I.e. advertise certain capabilities?

One other question is, is there anyway to have Teensy act as a USB pass through device (in terms of I/O and supporting a USB connection besides the built in one)? Lets say I have a joystick I want to connect to my PC, but I want to put Teensy inbetween the computer and joystick to modify the data stream?


Thanks,

Jonathan
 
jc179 said:
I've been directed here as a possible option for a few projects im working on. I am interested in using the Teensy as a USB mass storage device,
Click to expand...

Teensy 2.0 and Teensy++ 2.0 support mass storage, but Teensy 3.0 and 3.1 do not (yet). Be sure to get a 2.0 board for this.

I have some picky hardware that only works with certain devices (Eg VID/ PID / Model # / SN etc). I would like to [experiment] with Teensy and see if I can have it behave as that device. From doing a little research it seems possible to change the VID and PID on the teensy to match what's needed, but is there any option to add additional USB parameters that could be picked up by the host system? I.e. advertise certain capabilities?
Click to expand...

Yes, you can change all this stuff. But to do so, you'll need to edit the USB code. It's not do-able from in Arduino.

After installing Teensyduino (which you can do before buying anything), look in hardware/teensy/cores/usb_disk for the code.

One other question is, is there anyway to have Teensy act as a USB pass through device (in terms of I/O and supporting a USB connection besides the built in one)? Lets say I have a joystick I want to connect to my PC, but I want to put Teensy inbetween the computer and joystick to modify the data stream?
Click to expand...

No. Teensy is a USB device only. This would need 2 ports, one with host mode.

To learn more about "device", "host" and other USB terminology, please read chapter 4 of the USB spec.

http://www.pjrc.com/teensy/beta/usb20.pdf
 
Hi Paul

thanks very much for the detailed reply. So to sum it up the Teensy only supports being a USB device, but not acting as a USB Host.

Thanks,

Jonathan
 
Status
Not open for further replies.
Back
Top