OTA Update over serial communication

[Monika_02]

Hi,

I am working on OTA update over serial port communication(UART) How can I achieve this?  How can I trigger the bootloader and download, install the firmware update.  As I am using stm32H563zi.  Can I get any reference for the above scenario.

Thanks in advance.

[TDK]

You can jump to the bootloader and use the UART bootloader, if you are connected to pins supported by that function. See AN2606 for pins. STM32CubeProgrammer can connect to a chip in such a state using the commands seen in AN3155, or you can implement your own solution.

https://community.st.com/t5/stm32-mcus/how-to-jump-to-system-bootloader-from-application-code-on-stm32/ta-p/49424

https://www.st.com/resource/en/application_note/an2606-stm32-microcontroller-system-memory-boot-mode-stmicroelectronics.pdf

https://www.st.com/resource/en/application_note/an3155-usart-protocol-used-in-the-stm32-bootloader-stmicroelectronics.pdf

[Tesla DeLorean]

For most OTA you need to manage the AIR and the PROCESS, the System Loader in ROM permits ISP (In-System Programming) where as IAP (In-Application Programming) is probably what you need to manage the interaction in a more controlled, and user-specific/centric manner.

Various IAP examples exist across the STM32 Universe, see various CubeF4/ F7 / etc repositories. IAP on Serial often using Y-MODEM