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I really wish the ATMega chip family had built in usb functionality. That would make them a good competitor to the Microchip PIC 18F family.

• paulgb 17y ago
  Out of curiosity, is it possible to get USB functionality out of the chip at the software level? Or is speed the issue?
  • fhars 17y ago
    Yes, you can, but obviously speed is an issue. You will never saturate an USB 2.0 link with a pure software stack on an ATMega, but reading out a few sensors or some input device that is limited by the speed of the user's fingers is possible, search for avr-hid or hidkeys (can't copy and paste URLs in Opera Mini).
    • paulgb 17y ago
      Cool, thanks.
• samlittlewood 17y ago
  Do these meet your requirements? ATmega16U4 http://atmel.com/dyn/products/product_card.asp?part_id=4380 http://atmel.com/dyn/products/product_card.asp?part_id=4380 ATmega32U4 http://atmel.com/dyn/products/product_card.asp?part_id=4317 http://atmel.com/dyn/products/product_card.asp?part_id=4317 Or use an AT90USBxxx part like on: http://www.pjrc.com/teensy/index.html http://www.pjrc.com/teensy/index.html
  • aswanson 17y ago
    Yes, thank you very much.