Google IOT cloud integration mbedtls issue on STM32L946 discovery

[Cheye.1]

..

[Cheye.1]

So the problem really only seems to be the function

mbedtls_entropy_add_source

which takes in void*)&hrng as an argument, which is the hardware RNG, and which is not present on the STMF32F103

What is really strange though is, that when I look at the GCP2.0 code, there is a file iotc_bsp_tls_mbedtls.c which has a function iotc_bsp_tls_init, and which also calls all the functions for mbedtls initialization such as

mbedtls_platform_set_calloc_free

mbedtls_ssl_init

 mbedtls_ssl_config_init

 mbedtls_entropy_init

mbedtls_ctr_drbg_init

mbedtls_ctr_drbg_seed

but there is no call to mbedtls_entropy_add_source, so how does it do it's random number generation in this case.

This is a very complex bit of code, very difficult to follow...

The lack of documentation around how this SW is built, is very painful