Add config struct to Flash

[geonnave]

The idea is to introduce a set of self-contained changes to firmware and python, that enable DotBots and gateways to be easily provisioned at deployment time.

---

initial comment about writing to config memory

With this change we will be able to change the network id after flashing the hex, simplifying deployment.

The network id can be changed as follows:

nrfjprog -f NRF53 --coprocessor CP_NETWORK --erasepage 0x0103F000 # erase page
nrfjprog -f NRF53 --coprocessor CP_NETWORK --memwr 0x0103F000 --val 0x5753524D # magic value "SWRM"
nrfjprog -f NRF53 --coprocessor CP_NETWORK --memwr 0x0103F004 --val 0x00000100 # net_id = 0x0100

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0d7f248) to head (cc8ffe7).

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Lines         2102      2102           
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  Hits          2102      2102           

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[aabadie]

is there a way to write to flash using nrfutil ? nrfjprog is deprecated and should not be used.

[geonnave]

is there a way to write to flash using nrfutil ? nrfjprog is deprecated and should not be used.

Yes there is. I am preparing a script for that. I will use nrfutil to flash.

On the other hand, I found that we can read the device id with nrfjprog -f NRF53 --coprocessor CP_NETWORK --memrd 0x01FF0204 --n 8, and that is not possible with nrfutil.

So I will make a script that requires nrfutil, and, in case nrfjprog is available, also dumps the device id (that way we don't need a custom firmware speaking uart in the robot).

[geonnave]

How to test this change

Just follow the README: https://github.com/geonnave/swarmit/blob/a55d5b387edc4bff38f92bb6831b17884cc71724/swarmit/provision/README.md

During the first step (fetch), use the test release I created, called test-provision. So the fetch command is:

swarmit-provision fetch --fw-version test-provision

[geonnave]

For the moment I am using nrfjprog, since there was already a base script created by Martina that uses nrfjprog, so it was just faster to integrate it that way. We should be able to easily replace it with the more modern nrfutils, perhaps in a future PR.

[aabadie]

Nice and useful addition. I know it's annoying and time is missing but it took me quite some effort to cover all Python code with tests. Would you mind adding tests for the new provision modules?

[geonnave]

I see, however timing is unfortunate to add tests right now.

[geonnave]

Ok, removed all python changes, and kept only the C change for the config struct.

The python provisioning script now lives at https://github.com/DotBots/dotbot-provision