This file contains instructions how to patch avrdude to work withAVR-Doper's HID communication mode.===========================Do I Need to Patch Avrdude?===========================Before you start, make sure that your version of avrdude has not alreadybeen patched. If you have a binary, run the command    avrdude -c stk500v2 -P avrdoper -p atmega8If it answers "Device not found" or "initialization failed" or if it simplyconnects, then you have a patched version. If the error message is "No suchfile or directory", then it's not patched. All versions since avrdude 5.3support AVR-Doper in HID mode.If you have the source code, look for the file ser_avrdoper.c. If it isincluded, you have a patched version.=======================================How to Patch the Source Code of Avrdude=======================================If your version has not already been patched, get the source code of avrdude(e.g. from http://savannah.nongnu.org/cvs/?group=avrdude) and perform thefollowing steps:(1) Add the files ser_avrdoper.c and ser_avrdoper.h to the source directory.(2) Edit Makefile.am, search for ser_posix.c and add a similar line forser_avrdoper.c.(3) Edit stk500v2.c and search for "usbdevs.h". Immediately after    #include "usbdevs.h"add    #include "ser_avrdoper.h"Then search for "stk500v2_open" (first occurrence), advance to the line    pgmtype = PGMTYPE_UNKNOWN;and after it add the followint code to the function:    if(strcasecmp(port, "avrdoper") == 0){#if defined(HAVE_LIBUSB) || defined(WIN32NATIVE)        serdev = &avrdoper_serdev;        pgmtype = PGMTYPE_STK500;#else        fprintf(stderr, "avrdude was compiled without usb support.\n");        return -1;#endif    }(4) Re-run autoconf. This is done by running    ./bootstrapThis step is required in order to propagate the changes in Makefile.am intoMakefile.in. If you can't get autoconf to work, you can attempt the morecomplicated edit in Makefile.in instead.Avrdude is now patched and you can proceed with building it.===========================Building Avrdude on Windows===========================Avrdude, at least with this patch, requires MinGW in order to compile. MinGWcomes with the headers and libraries of the Windows Driver Development Kit(DDK). Go to the source directory and type    ./configureYou may want to add a --prefix= parameter or other options to configure, see"./configure --help" for more information.Unfortunately, configure does not get all guesses right. In particular, italways finds libusb, regardless whether you have it or not. If you don'thave libusb installed (very likely), edit the file "ac_cfg.h", search for"HAVE_LIBUSB" and delete (or comment out) the line.Furthermore, USB HID support needs more libraries on Windows than just -lusb.Edit the file "Makefile", search for "-lusb" (should be found twice) andreplace all occurrences of "-lusb" with "-lhid -lusb -lsetupapi".That's it. Now you can run "make" to build the code and "make install" toinstall it.====================================Building Avrdude on Unix or Mac OS X====================================Contrary to Windows, you need libusb on Unix and Mac OS X. Make sure it isinstalled. You can check whether it is installed with the command    libusb-config --versionIf the command exists, libusb is installed. Then change to the sourcedirectory of avrdude and type    ./configureOn Mac OS X, you must also specify additional libraries:    ./configure LDFLAGS="-framework IOKit -framework CoreFoundation"or if libusb is at a non-standard location, you may even need more options:    ./configure CPPFLAGS=-I/usr/local/include \    LDFLAGS="-L/usr/local/lib -framework IOKit -framework CoreFoundation"In either case you may want to pass additional parameters such as --prefix=or whatever. See "./configure --help" for details. Make sure that configurehas found libusb by searching the output for "usb".After configure, simply type "make" to build the code.(c) 2006 by OBJECTIVE DEVELOPMENT Software GmbH.http://www.obdev.at/