Building project with MegaCore no longer works

[gudnimg]

I have tried with both ATmega2560 and ATmega2561.

This has never been a problem before.

[gudnimg]

Here is my .ini file for one of my projects. It can be used to reproduce.

[env]
platform = atmelavr
framework = arduino
monitor_speed = 115200

board_build.f_cpu = 16000000L        ; 16MHz CPU frequency
board_hardware.uart = uart0          ; For Bootloader
board_hardware.oscillator = external ; External 16MHz crystal

upload_flags = -Pusb

build_flags =
    -Wunused-parameter ; Turn on compiler warning when functions have unused parameters

[env:megaatmega2561]
board = ATmega2561
board_build.mcu = atmega2561

[env:megaatmega2560]
board = ATmega2560
board_build.mcu = atmega2560

[gudnimg]

I can reproduce the problem:

platform = [email protected] does not work

platform = [email protected] works

[gudnimg]

If I revert line 78 here 5077ecb#diff-0184adedc292a93218525209d37dabe7330a013e6ff8fa46fd6328c5eb4598faR78 it works. Maybe something was missing when MegaCore was updated?

[gudnimg]

@valeros @MCUdude I'm thinking that maybe its best to include MegaCore specific MCUs in the example.yml to catch the build errors earlier?

[gudnimg]

Ok I looked more into the Github pipeline. There is one MegaCore MCU there and compiles fine. I installed Python 3.7.9 (pipeline uses 3.7.10) and I reinstalled PlatformIO... then the build worked fine. I had Python 3.9.1 before.

Now I've reinstalled 3.9.1 and I am getting this VS Code or SCons error:

But then when I try to reproduce this more by reinstalling PIO again without changing the Python installation I get no error. I'm so confused 😅 Will close this for now and reopen if I learn more.

[gudnimg]

The issue appeared again on another machine. Adding SPI to platformio.ini does not work as shown in the image below...

[valeros]

Have you tried to explicitly specify the SPI library as a dependency in lib_deps?

[gudnimg]

Have you tried to explicitly specify the SPI library as a dependency in lib_deps?

Yes I get the same results. You can see the Library Manager trying to install SPI in the image above. If I try to install SPI with a fresh platformio install I get a similar yellow text which says SPI library cannot be found for windows-amd64. Seems to install OK with the atmelavr framework though.

For reference I did it like this:

lib_deps =
     SPI
     ; ... more libraries below

[valeros]

Could you please put together a simple project to reproduce the issue?

[gudnimg]

@valeros here: https://github.com/GunZi200/MegaCore-ATmega2560-err

I get this result on my end. I created an Arduino Mega project and only changed the platformio.ini file.

If you can't reproduce this try one thing I did:

1. Install Python 3.9.1 and add it to PATH
2. delete .platformio folder and open vscode.
3. try to build project

I seem to be able to bypass this error when my machine has Python 3.7.9 installed.

[valeros]

It's strange, but I cannot reproduce the issue, tried your project with Python 3.9.1 and everything works just fine. Could you please run pio system info in your terminal?

[gudnimg]

Result from two different computers:

Computer 1 (it reproduces problem):

Computer 2 (it reproduces problem):

I have one more computer, will test it quickly and report here if it can reproduce it

EDIT:

I cannot reproduce this on the third computer:

[valeros]

That's super weird. Let's focus on machines where it doesn't work. Do you see the Wire library somewhere here c:\Users\Gudni\.platformio\packages\framework-arduino-avr-megacore\libraries\?

[gudnimg]

Hmm the folder on the machines where it doesn't work just looks like this:

[valeros]

Apparently, the framework-arduino-avr-megacore package is broken for some reason. Does it always look like that even when you delete the c:\Users\Gudni\.platformio folder and try again?

[gudnimg]

I get it to work sometimes but sometimes not. I found one way to trigger the issue when it was working.

I deleted the folder framework-arduino-avr-megacore then hit Clean and PIO will show me the progress of installing framework-arduino-avr-megacore again. I then hit Build and issue returns.

This issue is really slowing things down to test this hehe platformio/platformio-vscode-ide#2506

Edit: The Clean method I described above doesn't seem to always reproduce.

[valeros]

Do you have an antivirus by any chance?

[gudnimg]

No only Windows Defender, its never been a problem for me.

[valeros]

Something is messing with the PlatformIO packages on your machines and I'm guessing it's Windows Defender. Try to create an exclusion for c:\Users\Gudni\.platformio and then delete this folder to force PlatformIO redownload all packages.

[gudnimg]

@valeros I noticed that PlatformIO plugins installs framework-arduino-avr-megacore folder when reinstalling the .platformio folder. I see no installation progress and it seems to occur while this issue takes places: platformio/platformio-vscode-ide#2506. If I restart VScode while this is happening, that seems to be enough to trigger the issue.

[gudnimg]

Looking at the Console... could this be an issue?

[MCUdude]

I'm not sure if it's relevant or not, but I was not able to get the example project @GunZi200 provided when platformio.ini looked like this. Identical error to this one: #251 (comment)

[env:ATmega2560]
platform = atmelavr
board = ATmega2560
framework = arduino

; Libraries
lib_deps =
     Wire
     https://github.com/adafruit/RTClib ; Real-time clock library

lib_ignore = TinyWireM

However, if I changed the library dependent to this, it worked:

[env:ATmega2560]
platform = atmelavr
board = ATmega2560
framework = arduino

; Libraries
lib_deps =
     Wire
     adafruit/RTClib @ 1.13.0

lib_ignore = TinyWireM

[valeros]

@GunZi200 I believe it has nothing to do with this issue because your system contains broken framework package.

[gudnimg]

I think I have a solution...

Reproduction steps to make it work:

1. Open VScode
2. Find the folder .platformio\packages\framework-arduino-avr-megacore and delete it
3. Keep the folder .platformio\packages open
4. Now reload VScode window Ctrl + Shift + P -> Developer: Reload Window
5. PlatformIO: Rebuilding IntelliSense Index starts.
6. Notice how the framework-arduino-avr-megacore starts with content:

7. Now wait for PlatformIO: Rebuilding IntelliSense Index to finish in VScode an notice how the remaining content in folder framework-arduino-avr-megacore appears ~30 seconds later.

Build from this point works for me on all machines.

If I for some reason reload VScode in step 6 the issue appears and the package is broken. I can consistently reproduce this.

[valeros]

@GunZi200

If I for some reason reload VScode in step 6 the issue appears and the package is broken. I can consistently reproduce this.

If you do that, you will kill the platformio-core process that's running in background, which can lead to unpredictable side effects. In your case, I believe, you interrupted the process when PlatformIO was unpacking the framework-arduino-avr-megacore package and leaving it in a corrupted state.