Forum Rule: Always post complete source code & details to reproduce any issue!
Results 1 to 4 of 4

Thread: Teensy 3 won't enumerate on USB

  1. #1
    Junior Member
    Join Date
    Jul 2013
    Location
    Alameda, CA
    Posts
    6

    Teensy 3 won't enumerate on USB

    For the second time a teensy 3 now refuses to show up on USB. When I plug it into my Linux box I get:
    Aug 23 18:47:02 tp kernel: [52030.025231] usb 3-1: new full-speed USB device number 58 using xhci_hcd
    Aug 23 18:47:02 tp kernel: [52030.025437] usb 3-1: Device not responding to set address.
    Aug 23 18:47:03 tp kernel: [52030.229051] usb 3-1: Device not responding to set address.
    Aug 23 18:47:03 tp kernel: [52030.432438] usb 3-1: device not accepting address 58, error -71
    Aug 23 18:47:03 tp kernel: [52030.544210] usb 3-1: new full-speed USB device number 59 using xhci_hcd
    Aug 23 18:47:03 tp kernel: [52030.544377] usb 3-1: Device not responding to set address.
    Aug 23 18:47:03 tp kernel: [52030.747973] usb 3-1: Device not responding to set address.
    Aug 23 18:47:03 tp kernel: [52030.951455] usb 3-1: device not accepting address 59, error -71
    Aug 23 18:47:03 tp kernel: [52031.063276] usb 3-1: new full-speed USB device number 60 using xhci_hcd
    Aug 23 18:47:03 tp kernel: [52031.063435] usb 3-1: Device not responding to set address.
    Aug 23 18:47:04 tp kernel: [52031.267025] usb 3-1: Device not responding to set address.
    Aug 23 18:47:04 tp kernel: [52031.470455] usb 3-1: device not accepting address 60, error -71
    Aug 23 18:47:04 tp kernel: [52031.582296] usb 3-1: new full-speed USB device number 61 using xhci_hcd
    Aug 23 18:47:04 tp kernel: [52031.582485] usb 3-1: Device not responding to set address.
    Aug 23 18:47:04 tp kernel: [52031.786061] usb 3-1: Device not responding to set address.
    Aug 23 18:47:04 tp kernel: [52031.989482] usb 3-1: device not accepting address 61, error -71
    Aug 23 18:47:04 tp kernel: [52031.989522] hub 3-0:1.0: unable to enumerate USB device on port 1


    So there's someone home, but it's not responding. I'm starting to freak out because this is supposed to go to Burning Man, without me tomorrow morning...

    Any ideas? I'm about to walk down to Radio Shack to buy an Arduino and work out how to drive WS2811s from that

    Ian

  2. #2
    Senior Member PaulStoffregen's Avatar
    Join Date
    Nov 2012
    Posts
    20,599
    Can you still reprogram it from the Teensy Loader?

    If you load the LED blink, does it enumerate then? (indicating some sort of software issue)

    Or does it still have troubles even with the LED blink? (indicating some sort of hardware issue, perhaps power supply related?)

    On the power, if you're running it from the same 5V supply as lots of LEDs, you might try using a dedicated (presumably clean & low noise) 5V for the Teensy3. Or try the USB power?

  3. #3
    Junior Member
    Join Date
    Jul 2013
    Location
    Alameda, CA
    Posts
    6
    Aha! I can reprogram it from the loader. I thought it was dead to the world, but I can push the blinky program to it. Thanks for the suggestion.

    I'm running the LEDs and the teensy off a car battery. I'm running the teensy off a usb-car-charger hacked into the 12v supply in the worst way

    My electronics knowledge is still growing, but I feel like I still know some of what to feel guilty about. I'm hoping that there won't be particularly catastrophic power drops triggered by LEDs.

    Ian

  4. #4
    Junior Member
    Join Date
    Apr 2013
    Posts
    7
    I would not trust a 12v USB charger, especially if it's an inexpensive one like those available at every gas station counter, to put out a clean voltage for your Teensy. It's hard to tell without an oscilloscope, but you might need some capacitor filtering across the 5V going into the teensy. It's possible it could lock up due to switching noise from the charger, or from "power drops triggered by LEDs."

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •