Flashing a custom binary file using command line

samsonw · April 20, 2022, 3:36pm

Hi,

I have a special program to sign the application firmware build using platformio in order to work with my custom bootloader .

When the original application build it will create a firmware.bin
once signed using the wolfboot program it will rename to signed_firmware.bin and I’m trying to find a way to flash the signed_firmware.bin using pio command directly to the device using serial flash .

Is there any way to do it ?

My .ini is:
[env:nucleo_f767zi]
platform = ststm32
board = nucleo_f767zi
framework = arduino
upload_protocol = serial

Thanks ,
Samson.

maxgerhardt · April 20, 2022, 7:17pm

Given

github.com

platformio/platform-ststm32/blob/develop/builder/main.py#L272-L282


      
              __configure_upload_port=__configure_upload_port,
              UPLOADER=join(
                  '"%s"' % platform.get_package_dir("tool-stm32duino") or "",
                  "stm32flash", "stm32flash"),
              UPLOADERFLAGS=[
                  "-g", board.get("upload.offset_address", "0x08000000"),
                  "-b", env.subst("$UPLOAD_SPEED") or "115200", "-w"
              ],
              UPLOADCMD='$UPLOADER $UPLOADERFLAGS "$SOURCE" "${__configure_upload_port(__env__)}"'
          )

you might try to add an extra script that changes the UPLOADCMD to not use $SOURCE (which would eavluate to the firmware.bin file) but to your generated file.

extra_scripts = upload_signed.py

with upload_signed.py something like

from os.path import join
Import("env")

env.Replace(
   UPLOADCMD='$UPLOADER $UPLOADERFLAGS "%s" "${__configure_upload_port(__env__)}"' % (
    join(".pio", "build", "nucleo_f767zi", "signed_firmware.bin"))
)

Try and verify the new command by running the project task Advanced → Verbose Upload.

samsonw · April 21, 2022, 2:34pm

Thanks Max I will give it a try !