Getting started with NUCLEO-H7S3L8 USB

[Linduri]

Hi,

I'm trying to get started with the STM32 NUCLEO-H7S3L8 board to create a USB HS device. I am new to the boot/application split development (also to trustzone) and don't know where to find the right resources to get started. I have tried using the STM32CubeIDE examples importer but keep receiving "failed to copy error" which I don't know how to debug. I have also tried loading the project from the git repo, I can compile and run the boot project but know how to properly setup the application project to run as well.

I would really appreciate some pointers on where to find the information to get the CDC_Standalone example running and how to develop with the boot and application.

Apologies I can't be more specific, I seem a little out of my depth and don't know where to start!

[Sarra.S]

Hello @Linduri, welcome to ST Community, 

Here are some solid resources you can start from to understand the boot/application split development; 

• Getting started with External memory Manager and External memory loader - stm32mcu
• Introduction to external serial memories (XSPI) interoperability for STM32 - stm32mcu 
• Introduction to external memory manager and external memory loader middleware for boot flash MCU - Application note

[Pavel A.]

In addition to the links above, here you can help and support with your STM32 project.

https://www.fiverr.com/categories/programming-tech/electronics-engineering/embedded-systems-iot?ref=platform%3Astm32

[Linduri · Accepted solution]

After reading around for a considerable time I discovered that the STMCube code generator always sets the USB reference clock to 24MHz (unfortunately I have mis-placed the link to the post) which then conflicts with the HAL USB Init.

The problem was fixed by setting the USBPHYC Clock Mux to use the NUCELO-H7S3L8 external 24MHz HSE.