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geekhack Projects => Making Stuff Together! => Topic started by: xiaoquana on Fri, 20 March 2020, 06:19:13

Title: Trouble with fuse setting on At90usb646/1286
Post by: xiaoquana on Fri, 20 March 2020, 06:19:13

Hey, i am customizing a keyboard with the at90usb646/1286，and when i came to burn bootloader into the blank  chip with a isp programer , i don't know how to set the correct fuse . i saw these pagehttps://forum.arduino.cc/index.php?topic=167579.0 (https://forum.arduino.cc/index.php?topic=167579.0) ,  and it linked to the github https://github.com/DynamicPerception/ArduinoAT90USB (https://github.com/DynamicPerception/ArduinoAT90USB)where the bootloader.hex is , but nothing about the fuse setting was mentioned in the page and the github repositories.
Can any one give me some idea to set the fuse , if i want burn a Arduino-modified booloader.
my sch is refer to this teensy++ (https://www.pjrc.com/teensy/schematicpp.gif)

Title: Re: Trouble with fuse setting on At90usb646/1286
Post by: hasu on Sun, 22 March 2020, 03:44:45

That github repo has boards.txt, check it.

Title: Re: Trouble with fuse setting on At90usb646/1286
Post by: xiaoquana on Mon, 23 March 2020, 02:39:53

thank you may big brother ,  but i still have some troubles. i notice that the tool "avrdude" is mentioned in the board.txt . but i am not used to using the "avrdude" command tool , for it is troubling to set it .
can i just use the progisp to burn the hex into the chip with a usb-isp programer ?
(https://i.postimg.cc/rFqMbqrR/26736-F2-E-C024-4243-96-EF-882-D72-D48245.jpg)

Title: Re: Trouble with fuse setting on At90usb646/1286
Post by: FaisonSiu on Mon, 30 March 2020, 10:14:57

Have you tried it yet? What is the result?