Ardrino Dock2 request reflash recovery proceedure

C G

root@Omega-:~# avrdude -C /usr/share/arduino-dock/avrdude.conf -p atmega328p -c
linuxgpio -P gpio -n -v

     System wide configuration file is "/usr/share/arduino-dock/avrdude.conf"
     User configuration file is "/root/.avrduderc"
     User configuration file does not exist or is not a regular file, skipping

     Using Port                    : gpio
     Using Programmer              : linuxgpio
     AVR Part                      : ATmega328P
     Chip Erase delay              : 9000 us
     PAGEL                         : PD7
     BS2                           : PC2
     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  3600  3600 0xff 0xff
       flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
       lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       lock           0     0     0    0 no          1    0      0  4500  4500 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 : linuxgpio
     Description     : Use the Linux sysfs interface to bitbang GPIO lines
     Pin assignment  : /sys/class/gpio/gpio{n}
       RESET   = ~19
       SCK     =  15
       MOSI    =  16
       MISO    =  17

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0xff8dff
avrdude: Expected signature for ATmega328P is 1E 95 0F
Double check chip, or use -F to override this check.

avrdude done. Thank you.

György Farkas

@C-G Bad news. Is the signature 0xff8dff on each attempt - or does it change to a different value with every attempt?

C G

it changes:

executing avrdude -C /usr/share/arduino-dock/avrdude.conf -p atmega328p -c linuxgpio -P gpio -n -v

3x gives:

1st run: avrdude: Device signature = 0xfff1ff
next run: avrdude: Device signature = 0x318f7a
final run: avrdude: Device signature = 0xffc840

György Farkas

@C-G (If I were you) Before I'd say that your ATmega chip (or your Dock or both) is corrupted I'd check it in another way too - for example with an USB ISP programmer or with another Arduino (as ISP programmer). Perhaps I'd try to read the signature of another ATmega328P with the Dock.

I'm afraid the signature bytes on an ATmega328P (on any ATmega) are not writable with normal programming instructions. Please correct me if I'm wrong.
I haven't tested the next speculative command - if you think you can try it on your own risk :
avrdude -C /usr/share/arduino-dock/avrdude.conf -p atmega328p -c linuxgpio -P gpio -v -U signature:w:0x1E,0x95,0x0F:m
Most probably it'll fail:
avrdude: writing signature (3 bytes)
avrdude: verification error

I'm very sorry - I have no more idea.
Maybe one of our @administrators will say some cleverness to you.

Good luck.

C G

I added the -F switch:

root@Omega-:~# avrdude -C /usr/share/arduino-dock/avrdude.conf -p atmega328p -c
linuxgpio -P gpio -v -F -U signature:w:0x1E,0x95,0x0F:m

     System wide configuration file is "/usr/share/arduino-dock/avrdude.conf"
     User configuration file is "/root/.avrduderc"
     User configuration file does not exist or is not a regular file, skipping

     Using Port                    : gpio
     Using Programmer              : linuxgpio
     AVR Part                      : ATmega328P
     Chip Erase delay              : 9000 us
     PAGEL                         : PD7
     BS2                           : PC2
     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  3600  3600 0xff 0xff
       flash         65     6   128    0 yes     32768  128    256  4500  4500 0xff 0xff
       lfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       hfuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       efuse          0     0     0    0 no          1    0      0  4500  4500 0x00 0x00
       lock           0     0     0    0 no          1    0      0  4500  4500 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 : linuxgpio
     Description     : Use the Linux sysfs interface to bitbang GPIO lines
     Pin assignment  : /sys/class/gpio/gpio{n}
       RESET   = ~19
       SCK     =  15
       MOSI    =  16
       MISO    =  17

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0xff6323
avrdude: Expected signature for ATmega328P is 1E 95 0F
avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as DA
avrdude: safemode: efuse reads as 5
avrdude: reading input file "0x1E,0x95,0x0F"
avrdude: writing signature (3 bytes):

Writing | ################################################## | 100% 0.00s

avrdude: 3 bytes of signature written
avrdude: verifying signature memory against 0x1E,0x95,0x0F:
avrdude: load data signature data from input file 0x1E,0x95,0x0F:
avrdude: input file 0x1E contains 3 bytes
avrdude: reading on-chip signature data:

Reading | ################################################## | 100% 0.00s

avrdude: verifying ...
avrdude: 3 bytes of signature verified

avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as DA
avrdude: safemode: efuse reads as 5
avrdude: safemode: Fuses OK (E:05, H:DA, L:FF)

avrdude done. Thank you.

BUT, it didn't change anything:

root@Omega-:~# avrdude -C /usr/share/arduino-dock/avrdude.conf -p atmega328p -c
linuxgpio -P gpio -v

(output muted for brevity)

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0xe01cff
avrdude: Expected signature for ATmega328P is 1E 95 0F
Double check chip, or use -F to override this check.

avrdude done. Thank you.

Seems like i need to burn a new boot loader, by using a 2nd ardrino as an "Ardino as ISP" programmer.

https://learn.sparkfun.com/tutorials/installing-an-arduino-bootloader.

The correct bootloader code is required for the atmega328p to accept programming from the serial port.

I wonder if the omega has access to the ICSP port. If not, i have a spare uno i could use as a programmer, but i am unsure which IDE settings to use, as the example in the link is for uno to uno.

C G

i fixed it by following this:

https://www.arduino.cc/en/Tutorial/ArduinoISP

the procedure i used was:

upload ardrinoISP sketch to a spare Ardrino uno.

remove all connections and omega2+ from the ardino dock2.

connected the uno to the dock2 icsp port as shown in the 1st link.

set ardrino IDE to board "Ardrino/Genuino Uno"
set ardrino IDE programmer to "Ardino as ISP"
set port to /dev/tty/ACMO

selected "burn bootloader"

disconnected the uno.

reinstalled the omega2+

now the dock2 is programmable via the omega2+ using

set ardrino IDE to board "Ardrino/Genuino Uno"

and

Programmer "AVRISP mII"

via the network port

root@Omega-:~# avrdude -C /usr/share/arduino-dock/avrdude.conf -p atmega328p -c linuxgpio -P gpio -n -v

reports consistently:

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e950f
avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as DA
avrdude: safemode: efuse reads as 5

avrdude: safemode: lfuse reads as FF
avrdude: safemode: hfuse reads as DA
avrdude: safemode: efuse reads as 5
avrdude: safemode: Fuses OK (E:05, H:DA, L:FF)

avrdude done. Thank you.

György Farkas

@C-G Congratulations!
So the external programmer (the other Arduino) was reading the correct signature and that's how it was able to (re)write the chip.
I don't fully understand the way your method works but that's not the point. The main thing is that everything is working fine now.

Onion's official Arduino IDE setting (IDE >> Tools) is different than yours:

Board: "Onion Arduino Dock"
Port: "Omega-XXXX at_IP_address (Arduino/Genuino Uno)"
Programmer: "irrelevant"

vs.

Board "Ardrino/Genuino Uno"
Port: "network port"
Programmer "AVRISP mII"

But if this is working out for you ... that's your call.

Footnote:
I'm sorry the original cause of the error was not revealed after all. I wouldn't want to reproduce it intentionally but if I accidentally stumble upon this error I'll try your method too.

Matthew Lousteau

@C-G Thanks so much. This totally worked. Don't forget the 10 micro-f capacitor between ground and reset on the programming Arduino.

Matthew Lousteau

@Matthew-Lousteau Take that back. I reacted too quickly.

Matthew Lousteau

@Matthew-Lousteau OK. so it works, but if I have a ground pin connected into my project, it won't let me flash my sketch. If I disconnect the ground pin, I can flash the sketch and reconnect the pin afterwards and the sketch runs as I expected.