(See USBasp, AVRdoper, USBprog)Īll the firmware code is distributed under the GPL, the hardware design layout files are CC 2.5 Attrib./Share-alike. Having a full kit available solves the 'chicken & egg' problem of purchasing or building a USB programmer that then needs a programmer of some sort to 'kick start'. You can build this design using the schematic and firmware, or buy a kit from the Adafruit webshop. Other changes are new VID/PID (to make it official), removing some of the commands, and moving around the pins a bit. The main improvements are: adjusting the code to allow it to act as a SpokePOV interface, adding lowlevel bitbang commands, and addition of a 'USB good' LED. The project is based off of the USBtiny code & design.

Perfect for students and beginners, or as a backup programmer. It is low cost, easy to make, works great with avrdude, is AVRStudio-compatible and tested under Windows, Linux and MacOS X.

avr programming protocol and spi device programming language programming. This is documentation for a simple open-source USB AVR programmer and SPI interface. at least for programming avr protocol is not well understand for high at all. AVR programmers for small and medium scale production such as low cost USB ISP and Advanced AVR JTAG with standalone GUI, command line and DLL options.

Atmel spi programmer