77 lines
2.5 KiB
Plaintext
77 lines
2.5 KiB
Plaintext
---
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title: "Arduino Giga Recovery Guide"
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author:
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- name: Hector van der Aa
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email: hector@h3cx.dev
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affiliation: Version 0.1.0
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date: today
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date-format: long
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format:
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typst:
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mainfont: Inter
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codefont: "JetBrains Mono"
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papersize: a4
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margin:
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x: 2cm
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y: 2cm
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toc: true
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---
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```{=typst}
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#set page(
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header: align(right)[
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Version 0.1.0
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],
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numbering: "1",
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)
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```
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```{=typst}
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#pagebreak()
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```
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# Background
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This document outlines the procedure to recover a bricked Arduino Giga R1 board.
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::: {.callout-important}
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This guide does **NOT** return the Arduino Giga to its factory state *(ie the ability to flash via USB with the Arduino IDE)*. However it can be applicable as a first step to a factory restore to Arduino defaults.
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:::
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After having does a few tests with code generated by STM32CubeMX, I once found one of my Arduinos in a seemingly dead state, no signs of life other than the power LED and a daunting error when trying to flash: `Error: Failed to initialize DAP`. After many hours of trying things, I finally managed to figure out how to recover the mcu when it has been flashed with firmware that rendered it lifeless.
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::: {.callout-note}
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Once the board is recovered, **CHECK** your RCC configuration in STM32CubeMX, it is likely a power configuration issue where RCC tries to power from an external SMPS when it should be set to LDO_INTERNAL
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:::
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# Recovery
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## Prerequisites
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In order to recover the board, you will need the following:
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- STM32CubeProgrammer
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- A USB-C cable
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## Process
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{width=90%}
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Open up STM32CubeProgrammer and set the connection mode to USB
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{width=80%}
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Then while holding down the `BOOT` button on the Arduino Giga, plug it in. Keep holding the button down for about 5 seconds then release.
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{width=40%}
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Then (1) click the refresh button in STM32CubeProgrammer, you should see a USB device appear, if it doesnt, unplug your board and try the previous step again.
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Once the device is recognized, (2) click on connect to establish a connection to the board.
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{width=90%}
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You can now proceed to a chip erase:
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1. Open the "Erasing and Programming" window
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2. Click the "Full chip erase" button, acknowledge any warnings etc
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3. Once the chip erase is complete, click disconnect
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**Congrats**, you have successfully unbricked your board, you should now be able to connect to it via JLink. Now good luck finding the config fluke that bricked it.
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