pymcuprog reports upload success but is not uploading code about pymcuprog HOT 10 OPEN

Hi @paulskirk53 - pymcuprog allows for programming several segments in several sessions, and thus does not erase the device before programming.
Before release 3.13 the solution from platformio was to chain erase and program: pymcuprog erase && pymcuprog write
In 3.13 the --erase switch was added which means it can be done in one operation using pymcuprog write --erase
And if you are in doubt, use the --verify switch to check by read-back after programming.
(The --erase is not done by default - we have too many [internal] use-cases which will need to be addressed if we change this behaviour)

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Ah, brill, thanks for the explanation.

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Hi, I have just come back to this using the Platformio CLI, and using this command
pymcuprog write -d atmega4809 -t uart -u COM5 -c 250k -f .pio\build\ATmega4809\firmware.hex --erase
I get the error:
pymcuprog: error: unrecognized arguments: --erase

any help much appreciated.

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@paulskirk53 - please verify which version of pymcuprog you are running since this --erase switch was added not long ago.
pymcuprog --version

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it is 3.13.3.166
I did
pip install pymcuprog

earlier today. It did work with the --erase option after I posted in July.
thanks for help.

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That version was released in May... Are you sure there is not an older version in a venv inside platformio?

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sorry I wouldn't know how to check, is there a command I can use to check for a virtual env.? Perhaps I should post about that on the PIO forum?

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I guess easiest would be to replace the programming flash write call in your .ini file with pymcuprog --version and check the output from that...

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i was never able to get pymcuprog working via the platformio.ini file, so I use it from the CLI. So I removed --erase and used this:
pymcuprog write -d atmega4809 -t uart -u COM5 -c 250k -f .pio\build\ATmega4809\firmware.hex --version

and it reports pymcuprog version 3.13.3.166

hope that helps.

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works fine this morning, no probs uploading with --erase. Only difference is the machine was restarted this morning. Version number is the same. Thanks for help.

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