This is the README file for AVRUSBBootAVRUSBBoot is a bootloader for the Atmel AVR controllers. It uses a firmware-only USB driver to transfer binary data from the PC to theflash of the controller. Once the AVR is flashed with the bootloader,no other ISP programmer is needed; then the microcontroller can bereprogrammed over USB.LICENSEThe project is built with AVR USB driver by Objective Development, which ispublished under a proprietary Open Source license. To conform with thislicense, USBasp is distributed under the same license conditions. See thefile "firmware/usbdrv/License.txt" for details. BUILDING AND INSTALLING FROM SOURCE CODEFirmware:To compile the firmware1. install the GNU toolchain for AVR microcontrollers (avr-gcc, avr-libc),2. change directory to firmware/3. run "make"4. flash "main.hex" to the ATMega8. E.g. with uisp or avrdude (checkthe Makefile option "make avrdude").You have to change the fuse bits for external crystal, e.g. high byte = 0xc9and low byte = 0x9f.Software:To compile the software:1. install libusb: http://libusb.sourceforge.net/2. change directory to software/3. run "make"Notes on Windows (Cygwin):Download libusb-win32-device-bin-x.x.x.x.tar.gz fromhttp://libusb-win32.sourceforge.net/ and unpack it.-> copy lib/gcc/libusb.a to lib-path-> copy include/usb.h to include-pathcd softwaremakeFILES IN THE DISTRIBUTIONReadme.txt ...................... The file you are currently readingfirmware ........................ Source code of the controller firmwarefirmware/usbdrv ................. AVR USB driver by Objective Developmentfirmware/usbdrv/License.txt ..... Public license for AVR USB driver and USBaspsoftware ........................ Source code of the host softwarecircuit ......................... Example circuit diagrambin/win-driver .................. Windows driverMORE INFORMATIONFor more information on AVRUSBBoot and it's components please visit thefollowing URLs:AVRUSBBoot ...................... http://www.fischl.de/avrusbboot/Firmware-only AVR USB driver .... http://www.obdev.at/products/avrusb/libusb .......................... http://libusb.sourceforge.net/libusb-win32 .................... http://libusb-win32.sourceforge.net/2006-06-25 Thomas Fischl <tfischl@gmx.de>http://www.fischl.de