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December 24, 2015 AT 5:34 pm

Turning your Raspberry PI Zero into a USB Gadget @raspberry_pi #raspberrypi

Raspberry Pi 2885-04

Turning your Raspberry PI Zero into a USB Gadget @ The Adafruit Learning System.

When the Pi Zero came out, one of the downsides (!) of the low-cost design was swapping the ‘standard’ USB A-port for a micro-B port. Now you have to use an ‘OTG’ cable instead of just plugging in a device.
There was also the matter of, if you didn’t have anything connected to USB, and powered up the Pi, you’d get a strange warning

WARN::dwc_otg_handle_mode_mismatch_intr:68: Mode Mismatch Interrupt: currently in Device mode

Basically, the Pi sorta-trying to become a usb device rather than a usb host

Some awesome people on github sorted out that if you used the DWC2 USB driver, and patched a few files, you could get the Pi to act like a USB device (in linux-land this is called the USB Gadgetsystem)
This tutorial is basically just a writeup of how you can follow along and turn your Pi zero into a Usb Serial device or Ethernet device. That’s two whole ways of being able to connect to your Pi zero just by plugging in a micro B cable!
You don’t even need to power your Pi seperately, as power is provided from your computer.

Learn more!


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2 Comments

  1. Looking forward to see using rpi zero as “bad usb”

  2. I was reading another article on a different website that linked to this Adafruit article. There are some comments there that ask Why, What is the purpose of the RPiZero. Instead of signing up for another page I may never visit again, I chose to post a comment here to help those who may follow that link to this sight. My comment about the RPiZreo (and RRPi’s in general) is found below. Thank you for allowing me to express my viewpoint.

    One should know by now that the primary goal of the Raspberry Pi Foundation to simple:

    L-E-A-R-N

    Initially the RPi was directed at young minds from age 5 up. Just one visit to http://www.raspberrypi.org will answer most of the ‘Why?’ questions. Still unsure: then consider asking yourself this question:

    ‘Do I want to be able to tell computers what to do, or am I content with computers telling me what to do?’

    My suggestion, if you do not want to learn then you should probably not get a Raspberry Pi of any type. On the other hand, if you have children, maybe they do want to learn. Raspberry pi computers are priced between $5.00US and $35.00US, depending on the model you purchase. Note, the Raspberry Pi is a full blown computer with huge support it is not a micro-processor. want to know the difference?

    L-E-A-R-N… you are in the Knowledge-age now! 🙂

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