Hi, I’m having trouble uploading to Feather M0, despite it works fine with Arduino IDE. The problem as I can see is that PIO forcing reset the device and wait for new comport to appear, whereas the board is expecting no reset since resetting results in not being in the bootloader mode (bootloader ne…

Hey, I got myself an Adafruit Feather M0 and can successfully upload code using the following python modification: elif upload_protocol == "sam-ba": env.Replace( UPLOADER="bossac", UPLOADERFLAGS=[ "--port", '"$UPLOAD_PORT"', "--write", "--veri…

Try doing a verbose upload in both, and see what differences there are in the upload command used, and the versions of the tools (if stated). PlatformIO: [vscode_platformio_verbose_upload] Arduino IDE: Change the setting, and then upload as normal. [XnFPkMEg9E]

[image] tao: whereas the board is expecting no reset since resetting results in not being in the bootloader mode (bootloader needs double click reset button). Nope, opening the serial port at 1200 baud will also cause it to enter bootloader mode, which is what bossac is using, see thread here .…

I’m hoping provision of further logs will indicate why the PlatformIO log fails with: bossac: extra arguments found Try 'bossac -h' or 'bossac --help' for more information

Thank you @pfeerick , I did verbose upload on both Arduino IDE and PlatformIO, the difference I can see is: Arduino IDE, using bossac 1.7.0: bossac -i -d --port=cu.usbmodem1451101 -U true -i -e -w -v firmware.bin -R vs PlatformIO, using bossac 1.9.1: bossac --info --debug --port "cu.usbmodem14511…

Ok thanks @maxgerhardt , I can see both are doing the same so yeah you’re right, this is not the cause.

Also a slightly independent question regarding bossac, in PlatformIO IDE by default the integrated terminal cannot find bossac binary, I tried both on MacOS and Windows10 in a VM. I had to manually install bossac and link it into /usr/local/bin Is it just on my computer?

[image] tao: I had to manually install bossac and link it into /usr/local/bin PlatformIO doesn’t throw any binaries in your normal user path. The binary is PlatformiO’s package directory, see /home/<user>/.platformio/packages/tool-bossac

OK, yeah I found out that, just got confused when asked to “Try ‘bossac -h’ or ‘bossac --help’ for more information” then I did and the integrated terminal couldn’t find the binary. I’m not sure where am I supposed to try “bossac -h” from PlatformIO’s point of view.

[image] tao: However after I changed -U true to --usb-port=TRUE Could you try in your platformio.ini upload_flags = --usb-port=TRUE please? This should add the upload flag (while keeping the old one which is hopefully ignored)

Just gave it a try, the new command is in, but the old one is not overridden, so the result is the same. how to override the old parameter setting? Verbose: bossac --usb-port=TRUE --info --debug --port "cu.usbmodem1451101" --write --verify --reset --erase -U true .pio/build/adafruit_feather_m0/fir…

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Upload to Adafruit Feather M0 (SAMD21) does not work

maxgerhardt August 10, 2019, 10:50am 3

Nope, opening the serial port at 1200 baud will also cause it to enter bootloader mode, which is what bossac is using, see thread here.