khimaros/at90usb128-boot

minimal firmware to reliablly enter the at90usb128 bootloader using BOOTSZ fuses

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  __ _| |_ / _ \ / _ \ _   _ ___| |__ / |___ \( _ )  | |__   ___   ___ | |_ 
 / _` | __| (_) | | | | | | / __| '_ \| | __) / _ \  | '_ \ / _ \ / _ \| __|
| (_| | |_ \__, | |_| | |_| \__ \ |_) | |/ __/ (_) | | |_) | (_) | (_) | |_ 
 \__,_|\__|  /_/ \___/ \__,_|___/_.__/|_|_____\___/  |_.__/ \___/ \___/ \__|
                                                                            
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Build

$ make

Flash

$ make install

References:

• https://github.com/WestfW/fusebytes/blob/master/fusebytes.ino
• https://github.com/tmk/tmk_keyboard/blob/45e45691e0c03f1b5ea4341c6d90f9a09016a37d/tmk_core/common/avr/bootloader.c#L58
• https://www.pjrc.com/teensy/jump_to_bootloader.html