UDPI using upload_command with multiple lines

1

I’m using this command in platform.ini to program UDPI and it works.

upload_command = pymcuprog $UPLOAD_FLAGS write --filename $SOURCE --verify

I need to do a few lines of pymcuprog, but upload_command is only a single line.
For example, I’d like to run these 3 lines

  1. pymcuprog $UPLOAD_FLAGS erase -chip-erase-locked-device
  2. pymcuprog $UPLOAD_FLAGS write --filename $SOURCE --verify
  3. pymcuprog write -m lockbits -l 0

I tried creating one long upload_command using &&, but PYMCUPROG is not handling it very well. It might need a delay between lines.

2

Seems like you want one pre-action before uploading (erasing locked device) and one post-action after uploading (locking device again). Hook the before + after events for the upload task and execute your pymcuprog commands there. See

https://docs.platformio.org/en/latest/scripting/actions.html

You can arbitrarily time.sleep() after the commands you’ve executed.

3

Thanks. After looking at that, not sure what to do. There are no examples on my machine.

do I need to create 2 scripts here? And do I need to write them in Python?

4

Well but I’ve just linked you to two examples.

You can write one python script, that is being referenced in the platformio.ini, that will register these actions.

Import("env")

def before_upload(source, target, env):
    print("before_upload")
    # execute pymcuprog $UPLOAD_FLAGS erase -chip-erase-locked-device
    # e.g. env.Execute()

def after_upload(source, target, env):
    print("after_upload")
    # execute pymcuprog write -m lockbits -l 0 
    # e.g. env.Execute()

env.AddPreAction("upload", before_upload)
env.AddPostAction("upload", after_upload)
5

That’s great, thank you so much. Got it working.

Yeah, I couldn’t find any upload commands or pymcuprog examples.