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Topic: AVR-USB firmware (Read 1 time) previous topic - next topic


A Firmware-Only USB Driver for Atmel AVR Microcontrollers

A USB device without dedicated USB hardware

AVR-USB is a firmware-only implementation of a USB 1.1 compliant low-speed device for Atmel's AVR microcontrollers. It runs on any AVR microcontroller which has at least 2 kB of Flash memory, 128 bytes RAM and can be clocked at 12 MHz. No UART, timer, input capture unit or other special hardware is required (except one edge triggered interrupt).

AVR-USB can be licensed freely under an Open Source compliant license or alternatively under a commercial license.

   * Fully USB 1.1 compliant low-speed device, except handling of communication errors.
   * Supports two endpoints: one control and one interrupt endpoint.
   * Transfer sizes up to 254 bytes.
   * Comes with freely usable USB identifiers (Vendor-ID and Product-ID pair).
   * Customizable sections are written in "C" and are well commented.
   * Delivered with fully functional example applications.
   * Only about 1400 to 1500 bytes code size for basic functionality.
   * You can choose the License: Open Source or commercial



wow. I wonder if that would  make a $5 Arduino possible?
the schematic is so simple...

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