Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

Burn USB bootloader into bare AVR chip (simulating a Pro Tri
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Burn USB bootloader into bare AVR chip (simulating a Pro Tri

by smachin on Fri Oct 16, 2020 10:12 am

Hi All,

I want to move a design that uses the Pro Trinket 3V to a custom chip on board solution. Is it possible to program a bare AVR chip with the USB bootloader that the Trinket uses? My design does expose a 6 pin ICSP style header (i.e. wires to the AVR's MISO, MOSI, SCK and RESET lines).

smachin
 
Posts: 3
Joined: Mon Dec 28, 2015 10:19 pm

Re: Burn USB bootloader into bare AVR chip (simulating a Pro

by adafruit_support_bill on Fri Oct 16, 2020 10:29 am

The source code is published here:
https://github.com/adafruit/Adafruit_Pr ... Bootloader

Please note the VID & PID usage restrictions. USB.org does allow sharing of vendor and product IDs.

Please note: you cannot use the Adafruit USB VID/PID for your own non-Trinket products or projects. Purchase a USB VID for yourself at http://www.usb.org/developers/vendor/


adafruit_support_bill
 
Posts: 79093
Joined: Sat Feb 07, 2009 10:11 am

Re: Burn USB bootloader into bare AVR chip (simulating a Pro

by smachin on Fri Oct 16, 2020 10:36 am

Thanks for the response. Yes point noted on the USB ID, this would just be for bringup and further testing, we'd program the board another way for mass production.

smachin
 
Posts: 3
Joined: Mon Dec 28, 2015 10:19 pm

Please be positive and constructive with your questions and comments.