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feat: flash sketch in ram#12

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Merged
lucarin91 merged 5 commits intomainfromflash-in-ram-mode
Nov 6, 2025
Merged

feat: flash sketch in ram#12

lucarin91 merged 5 commits intomainfromflash-in-ram-mode
Nov 6, 2025

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@lucarin91
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@lucarin91lucarin91 commentedOct 21, 2025•
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Motivation

Arduino apps require that the micro is in sync with the orchestration handled byarduino-app-cli. In particular, at boot, we need the micro to wait for thearduino-app-cli, and start only to execute the sketch of the default app or some other app decided by the user.

For this reason, we need to use the flash on RAM feature of thezephyr platform, which allows. In this way, the micro loses the code at every boot, and thearduino-app-cli can reflash it with the correct app at boot.

Change description

Update the flash mode to RAM, and handle the case in which the micro was previously flashed from the IDE2 with an in-flash sketch.

As a general note, a sketch could be flashed in RAM only if the micro is waiting for a sketch, which means that if there is a sketch already running from the flash, it should be removed by flashing an empty one.

Change description

Additional Notes

Reviewer checklist

  • PR addresses a single concern.
  • PR title and description are properly filled.
  • Changes will be merged inmain.
  • Changes are covered by tests.
  • Logging is meaningful in case of troubleshooting.

@per1234per1234 added the enhancementNew feature or request labelOct 21, 2025
@lucarin91lucarin91 requested review froma team,cmaglie anddido18 and removed request forcmaglieOctober 23, 2025 08:12
@lucarin91lucarin91 marked this pull request as ready for reviewOctober 30, 2025 14:53
@mirkoCrobu
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As a general note, a sketch could be flashed in RAM only if the micro is waiting for a sketch, which means that if there is a sketch already running from the flash,it should be removed by flashing an empty one.

Is this something that should be notified to the user before the removal?

@lucarin91
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How to test it

  1. Create an app with a sketch that includes something that start in the setup for instance light up the led matrix
#include <Arduino_LED_Matrix.h>Arduino_LED_Matrix matrix;void setup() {  const uint32_t full[4] = {0xffffffff,0xffffffff,0xffffffff,0xffffffff};  matrix.begin();  matrix.loadFrame(full);}void loop() {}
  1. start the app, the led matrix should be on
  2. restart the board by disconnecting and reconnecting it

expected result: the led matrix should be off till you start again the app

previus result: the les matrix will be on right after the animation.

@lucarin91lucarin91 merged commitcdbb28c intomainNov 6, 2025
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@lucarin91lucarin91 deleted the flash-in-ram-mode branchNovember 6, 2025 13:44
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@mirkoCrobumirkoCrobumirkoCrobu approved these changes

@dido18dido18Awaiting requested review from dido18

@cmagliecmaglieAwaiting requested review from cmaglie

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@lucarin91@mirkoCrobu@per1234
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