Skip to content

Instantly share code, notes, and snippets.

@keshuaixu

keshuaixu/rbe3001unbrick.md

Created February 1, 2017 16:05
Show Gist options
  • Save keshuaixu/c31815636b8b5e27917800871cc2234e to your computer and use it in GitHub Desktop.
Save keshuaixu/c31815636b8b5e27917800871cc2234e to your computer and use it in GitHub Desktop.
Download ZIP
Unbrick RBE3001 ATMega644p with incorrect fuse using STK500
Raw
rbe3001unbrick.md

Unbrick RBE3001 ATMega644p with incorrect fuse using STK500

Step 1

Connect the STK500 in high voltage programming mode. http://www.atmel.com/webdoc/stk500/stk500.PHVProgramming.html http://www.atmel.com/webdoc/stk500/stk500.highVoltageProgramming.html

Step 2

Use avrdude to write the fuse. Change /dev/ttyUSB0 to the actual serial port.

avrdude -p ATMega644p -c stk500 -P /dev/ttyUSB0 -v -U lfuse:w:0xcf:m -U hfuse:w:0xd1:m -U efuse:w:0xff:m

It should say

avrdude: verifying ...
avrdude: 1 bytes of efuse verified

avrdude: safemode: hfuse reads as D1
avrdude: safemode: efuse reads as FF
avrdude: safemode: Fuses OK (E:FF, H:D1, L:CF)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment