Flashing Arduino Mega 2560, failing with step…

[stllvdv]

Hi @paradajz et al.,

Trying to flash an Arduino Mega 2560, but unsuccessful so far. Running Ubuntu 22.04 through Parallels on latest macOS Ventura. Been following Flashing AVR boards thoroughly with some minor issues (obsolete cmake version, missing avrdude), but got those fixed I think. Currently failing with the last step "sudo ./scripts/flash.sh" — Made sure to check that Arduino IDE states that the board is connected to ttyACMX with X == 0 so "0" should be correct, shouldn't it?

avrdude: see_open(): can't open device "/dev/0": no such file or directory

Warm regards.

[paradajz]

It's ttyACM0, not just 0

[stllvdv]

Thanks for allowing me to be stupid; means I get the chance to learn fast/er. Process starts to initialize now, but results in:

avrdude: Device signature = 0x000000
avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override
         this check.

[paradajz]

That usually means that the connections are wrong. Or the port is wrong. Verify both.

[stllvdv]

Thanks, again. The 10/Reset to 5/Reset was wrong indeed. Once fixed I was able to successfully flash both atmega2560 and atmega16u2 I think… Unfortunately OpenDeck board isn't yet found through config.shanteacontrols.com when connected through USB using latest Chrome browser. Would I need to flash the USB as well?

[stllvdv]

Nope, doesn't seem to fix it here.

[paradajz]

Try reflashing both mega2560 and mega16u2 with the attached binaries.

mega.zip

[stllvdv]

Cool, thanks. Will be back here in 15 minutes…

[stllvdv]

LOVE it. Thank you. Connected. This is really cool. I'll probably be around with more questions, but just wanted to say: thank you. This is all so cool, well done + your support has been super kind and helpful.

[paradajz]

Alright, great. I'll release the new version then!

[paradajz]

Post your entire YAML config.

[stllvdv]

---
  mcu: "atmega2560"
  extClockMhz: 16
  usb: false
  uart:
    usbLink:
      channel: 0
      type: "device"
    dinMIDI:
      channel: 1
  i2c:
    display:
      channel: 0
  buttons:
    type: "native"
    pins:
    -
      port: "B"
      index: 1
    -
      port: "B"
      index: 3
    -
      port: "L"
      index: 1
    -
      port: "L"
      index: 3
    -
      port: "L"
      index: 5
    -
      port: "L"
      index: 7
    -
      port: "G"
      index: 1
    -
      port: "D"
      index: 7
    -
      port: "C"
      index: 1
    -
      port: "C"
      index: 3
    -
      port: "C"
      index: 5
    -
      port: "C"
      index: 7
    -
      port: "A"
      index: 6
    -
      port: "A"
      index: 4
    -
      port: "A"
      index: 2
    -
      port: "A"
      index: 0
    -
      port: "B"
      index: 0
    -
      port: "B"
      index: 2
    -
      port: "L"
      index: 0
    -
      port: "L"
      index: 2
    -
      port: "L"
      index: 4
    -
      port: "L"
      index: 6
    -
      port: "G"
      index: 0
    -
      port: "G"
      index: 2
    -
      port: "C"
      index: 0
    -
      port: "C"
      index: 2
    -
      port: "C"
      index: 4
    -
      port: "C"
      index: 6
  analog:
    type: "4067"
    inputVoltage: "3.3"
    multiplexers: 8
    pins:
      s0:
        port: "A"
        index: 7
      s1:
        port: "A"
        index: 5
      s2:
        port: "A"
        index: 3
      s3:
        port: "A"
        index: 1
      z0:
        port: "F"
        index: 0
      z1:
        port: "F"
        index: 1
      z2:
        port: "F"
        index: 2
      z3:
        port: "F"
        index: 3
      z4:
        port: "F"
        index: 4
      z5:
        port: "F"
        index: 5
      z6:
        port: "F"
        index: 6
      z7:
        port: "F"
        index: 7
  leds:
    external:
      type: "native"
      pins:
      -
        port: "J"
        index: 0
      -
        port: "J"
        index: 1
      -
        port: "E"
        index: 4
      -
        port: "E"
        index: 5
      -
        port: "G"
        index: 5
      -
        port: "E"
        index: 3
      -
        port: "H"
        index: 3
      -
        port: "H"
        index: 4
      -
        port: "H"
        index: 5
      -
        port: "H"
        index: 6
      -
        port: "B"
        index: 4
      -
        port: "B"
        index: 5
      -
        port: "B"
        index: 6
      -
        port: "B"
        index: 7

[paradajz]

That configuration uses too much RAM. Another reason why I recommend against Arduino for new/large designs. The mega2560 won't boot because of that.

[stllvdv]

Interesting, thanks. Kicked the buttons and LEDs, kept only the multiplexers, still too much apparently…

EDIT: new YML, flashed again, now it's working with 64 analog inputs.
EDIT: new YML, flashed again, now it seems to be working with 96 analog inputs.
EDIT: new YML, flashed again, see below for 128 analog inputs…?

[stllvdv]

New YML, flashed again, seems to allow for 128 analog inputs and 2 presets.

---
  mcu: "atmega2560"
  extClockMhz: 16
  usb: false
  uart:
    usbLink:
      channel: 0
      type: "device"
    dinMIDI:
      channel: 1
  analog:
    type: "4067"
    inputVoltage: "3.3"
    multiplexers: 8
    pins:
      s0:
        port: "A"
        index: 7
      s1:
        port: "A"
        index: 5
      s2:
        port: "A"
        index: 3
      s3:
        port: "A"
        index: 1
      z0:
        port: "F"
        index: 0
      z1:
        port: "F"
        index: 1
      z2:
        port: "F"
        index: 2
      z3:
        port: "F"
        index: 3
      z4:
        port: "F"
        index: 4
      z5:
        port: "F"
        index: 5
      z6:
        port: "F"
        index: 6
      z7:
        port: "F"
        index: 7