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Include instructions for the new partition scheme
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‎content/Hardware Support/Generic/Reset-the-flash-memory-on-STM32H747-based-devices.md‎

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@@ -3,28 +3,84 @@ title: Reset the flash memory on STM32H747-based devices
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id: 16206977438748
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---
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Learn how to reset the QSPI flash memory for STM32H747-based Arduino devices by uploading a utility sketch. The sketch will remove any previous partitioning scheme, and recreate the factory-defined partition scheme. Finally, the latest connectivity firmware and TLS certificates are reinstalled.
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Learn how to reset or change the QSPI flash memory configuration on STM32H747-based Arduino boards using a utility sketch. Running the sketch erases any custom partitioning, restores one of two supported memory layouts, and reinstalls the latest connectivity firmware along with TLS certificates.
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You may want to use this procedure to:
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* Restore the factory-defined memory allocation for full support of Arduino IDE or Arduino Cloud.
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* Resolve issues with storage or connectivity.
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- Switch between different partition schemes.
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- Recover a board with incorrectly partitioned memory.
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- Resolve other issues with memory or connectivity.
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In this article:
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<!-- TOC -->
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- [Available partitioning schemes](#available-partitioning-schemes)
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- [Use the default partitioning scheme](#use-the-default-partitioning-scheme)
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- [Use the partitioning scheme for Arduino PLC IDE](#use-the-partitioning-scheme-for-arduino-plc-ide)
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- [Troubleshooting](#troubleshooting)
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<!-- /TOC -->
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---
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## Available partitioning schemes
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| Partitioning scheme | Description |
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|---------------------|-------------------------------------------------------------------------------------------------------------------------------------|
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| [Default partitioning scheme](#partition-your-device-for-arduino-cloud-or-other-applications) | Required for full Arduino Cloud support. |
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| [Arduino PLC IDE](#partition-your-device-for-arduino-plc-ide) | Compatible with Arduino PLC IDE 1.0.8. |
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---
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## Use the default partitioning scheme
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This partitioning scheme supports the latest Arduino Cloud features, and is recommended unless you are using your device with Arduino PLC IDE.
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Supported devices:
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* Arduino GIGA R1 WiFi
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* Arduino Opta Lite
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* Arduino Opta RS485
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* Arduino Opta WiFi
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* Arduino Portenta H7
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* Arduino Portenta H7 Lite
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* Arduino Portenta H7 Lite Connected
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* Arduino Portenta Machine Control
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- Arduino GIGA R1 WiFi
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- Arduino Opta Lite
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- Arduino Opta RS485
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- Arduino Opta WiFi
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- Arduino Portenta H7
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- Arduino Portenta H7 Lite
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- Arduino Portenta H7 Lite Connected
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- Arduino Portenta Machine Control
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Follow these steps:
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1. Open the partitioning sketch:
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- Arduino IDE: Ensure that you are using the [latest version of the board package](https://support.arduino.cc/hc/en-us/articles/4404691106066-Update-board-packages-in-Arduino-IDE), then select File > Examples > STM32H747_System > QSPIFormat.
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- Arduino Cloud Editor: Open the [QSPIFormat example](https://app.arduino.cc/sketches/examples?eid=arduino%2Fhardware%2Fmbed_opta%2F4.4.1%2Flibraries%2FSTM32H747_System%2Fexamples%2FQSPIFormat&slid=mbed_opta%3A4.4.1%3Astm32h747_system){.link-chevron-right} in the Cloud Editor.
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1. Connect your device to your computer and select the device in the editor.
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1. Click ![Upload button](img/symbol_upload2.png) **Upload** to upload the sketch to the device.
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1. Click the ![Serial Monitor button](img/symbol_monitor.png) **Serial Monitor** button in the top-right corner or select Tools > Serial Monitor (Arduino IDE only).
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1. Open the Serial Monitor. When this message appears, the process is complete:
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```
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Firmware and certificates updated!
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It's now safe to reboot or disconnect your board.
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```
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---
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> [!IMPORTANT]
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> Resetting the flash memory will remove the PLC IDE runtime. [Reinstall the runtime](https://docs.arduino.cc/software/plc-ide/tutorials/plc-ide-setup-license/#3-download-the-runtime) to continue using PLC IDE with your device.
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## Use the partitioning scheme for Arduino PLC IDE
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The default memory partitioning scheme is not compatible with Arduino PLC IDE 1.0.8.
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Supported devices:
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- Arduino Opta Lite
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- Arduino Opta RS485
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- Arduino Opta WiFi
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- Arduino Portenta Machine Control
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Follow these steps:
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1. Open the sketch in your editor:
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* Arduino IDE: Extract the .zip into your [Sketchbook](https://support.arduino.cc/hc/en-us/articles/4412950938514-Open-the-Sketchbook-folder). Ensure both `memory_partitioning.ino` and `certificates.h` are inside a folder named `memory_partitioning`.
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- Arduino IDE: Extract the .zip into your [Sketchbook](https://support.arduino.cc/hc/en-us/articles/4412950938514-Open-the-Sketchbook-folder). Ensure both `memory_partitioning.ino` and `certificates.h` are inside a folder named `memory_partitioning`.
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* Cloud Editor: Open the [Sketches tab](https://app.arduino.cc/sketches) and click on the **Create** button in the top-right corner. Select **Import local file** in the dropdown menu and import `memory_partitioning.zip`.
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- Cloud Editor: Open the [Sketches tab](https://app.arduino.cc/sketches) and click on the **Create** button in the top-right corner. Select **Import local file** in the dropdown menu and import `memory_partitioning.zip`.
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1. Open the imported sketch in your editor.
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It's now safe to reboot or disconnect your board.
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```
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Check if the problem persists. If you're using PLC IDE, you'll first need to [reinstall the runtime](https://docs.arduino.cc/software/plc-ide/tutorials/plc-ide-setup-license/#3-download-the-runtime). If you're using an Arduino Opta and still encounter issues, the memory may have write protection enabled. Follow the instructions in [Recover an Arduino Opta with read-only flash memory](https://support.arduino.cc/hc/en-us/articles/16289852333212-Recover-an-Arduino-Opta-with-read-only-flash-memory), then repeat the steps above.
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Note that resetting the flash memory will remove the PLC IDE runtime. To continue using PLC IDE with your device, you need to [reinstall the runtime](https://docs.arduino.cc/software/plc-ide/tutorials/plc-ide-setup-license/#3-download-the-runtime).
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---
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## Troubleshooting
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If you're using an Arduino Opta and still encounter issues, the memory may have write protection enabled. Follow the instructions in [Recover an Arduino Opta with read-only flash memory](https://support.arduino.cc/hc/en-us/articles/16289852333212-Recover-an-Arduino-Opta-with-read-only-flash-memory), then partition the memory again.

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