Featured Articles
Announcing Pi
Technical Specifications
Raspberry Pi FAQs
Win a Pi
Raspberry Pi Wishlist
Actions
Forum Thread Details
  • Replies 10 replies
  • Subscribers 667 subscribers
  • Views 8017 views
  • Users 0 members are here
Related

Raspberry pi usb output from GPIO

Former Member

I've had this idea and I've googled a lot to find out if it would be possible to attatch usb cable to raspberry pi's GPIO pins. I already got an old usb cable and cutted the other end off and i tought that I just attatch the vireing to GPIOs and plug other end, whitch have still the USB A port on it, to computer and I would be able to control all data.  I mainly am trying to program it to act as HID device.... Is there any python lybrary or can i just somehow output the raw data in bytes? How would i be able to do it?image

Parents Reply Children
  • in reply to gadget.iom

    On microcontrollers like the one on the raspberry PIs, USB is implemented as a peripheral: on the CPU chip some pins are dedicated to USB or might also be able to do GPIO if you don't need the USB function.

     

    The "separate chip" story comes from the LAN9514 on the raspberries. The broadcom CPU has only one USB port. This is fine when it is in a phone that has a single USB port, but as a more "general computer" more ports are required. So all model-B's have had a LAN chip that provides an USB hub for "more USB ports" as well as an Ethernet port.

     

    On the early model A's you can see the empty spot where the LAN-chip could have been mounted. See https://en.wikipedia.org/wiki/Raspberry_Pi   and look for the image of the "early raspberry pi 1 model a".