how do I unbrick the MMU2?
I tried to flash the 1.0.3 patch using Slic3rPE, but something went horribly wrong and I can't get it to flash now,
avrdude: Version 6.3-20160220-prusa3d, compiled on Nov 22 2018 at 16:13:18
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "/tmp/.mount_Slic3rxD4hmN/usr/bin/resources/avrdude/avrdude.conf"
Using Port : /dev/ttyACM0
Using Programmer : avr109
Overriding Baud Rate : 57600
AVR Part : ATmega32U4
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PA0
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 9000 9000 0x00 0x00
flash 65 6 128 0 yes 32768 128 256 4500 4500 0x00 0x00
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : butterfly
Description : Atmel AppNote AVR109 Boot Loader
Connecting to programmer: Found programmer: Id = "CATERIN"; type = S
Software Version = 1.0; No Hardware Version given.
Programmer supports auto addr increment.
Programmer supports buffered memory access with buffersize=128 bytes.
Programmer supports the following devices:
Device code: 0x44
avrdude: devcode selected: 0x44
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e9587 (probably m32u4)
avrdude: safemode: hfuse reads as D8
avrdude: safemode: efuse reads as CB
avrdude: reading input file "/home/mirar/prusa/prusa3d_fw_MMU2board_1_0_3.hex"
avrdude: writing flash (19966 bytes):
Writing | ###########################avrdude: error: programmer did not respond to command: set addr
avrdude: error: programmer did not respond to command: write block
# ***failed;
###################### | 100% 1.15s
avrdude: failed to write flash memory, rc=-1
avrdude: safemode: Verify error - unable to read lfuse properly. Programmer may not be reliable.
avrdude: safemode: Verify error - unable to read lfuse properly. Programmer may not be reliable.
avrdude: safemode: Sorry, reading back fuses was unreliable. I have given up and exited programming mode
avrdude: error: programmer did not respond to command: leave prog mode
avrdude done. Thank you.
I don't feel super impressed with SlicerPE and Prusa right now.
What parameters should I use to avrdude to flash it without Slic3rPE? Same as main unit?
Re: how do I unbrick the MMU2?
Hi Mirar,
try factory reset first and let me know, if it helped 😉
https://manual.prusa3d.com/Guide/Service+menu+-+Factory+Reset/871?lang=en