mbedTLS on STM32U575CGUx

[Chinmay]

Hi, 

There is a lot of differing documentation w.r.t the use of mbedTLS for STM32U5 MUC. Can someone share an "Application Note" or any documentation which explains the integration of mbedTLS library in the project.

PS: The relevant configuration files to get started with.

[CMYL]

Hello @Chinmay 

I suggest you to start with this article on STM32H5 that can be easily ported to STM32U5:

Porting Mbed TLS to the STM32H5 platform with hard... - STMicroelectronics Community

Best Regards,

Younes

[Chinmay]

Hello @CMYL ,

Thanks for your reply.

I tried the solution you proposed and have the following observations,

- For the STM32U575CGUx, there is not AES accelerator and PKA to be enabled. 

- The generated code does not have mbedTLS library.

Moreover, the software Packs also does not have mbedTLS to be added via the tool.

Best Regards,

Chinmay

[CMYL]

Hello @Chinmay 

- The calls to software-implemented algorithms are still available, valid and can be used in STM32H573. You need to configure the include/mbedtls_config.h to choose the software implementation instead of the alternate (ALT) hardware one. 

For the STM32U575, you need also to modify the file "include/mbedtls_config.h"

The file is fully documented, for AES for instance, comment the MBEDTLS_AES_ALT and it will be replaced with softwrare-implementation of AES API.

- mbedTLS is not integrated into the auto-generated code as it is a thir-party middelware. The section 3 of the article above shows how to integrate it into your auto-generated project.

- For the software packs, you need to download the stm32 middelware mbedTLS from the github. And the section 3 describes how to integrate it. 

Best Regards