Hi Palomo,

Please take a look at the recent thread https://lists.trustedfirmware.org/pipermail/mbed-tls/2020-April/000069.html 
which should give you a better understanding of how Mbed TLS manages and uses entropy from the underlying system.

Regards,
Hanno

From: mbed-tls <mbed-tls-bounces@lists.trustedfirmware.org> on behalf of Jesus Gualberto Palomo Garcia via mbed-tls <mbed-tls@lists.trustedfirmware.org>
Sent: Tuesday, May 19, 2020 2:56 PM
To: mbed-tls@lists.trustedfirmware.org <mbed-tls@lists.trustedfirmware.org>
Subject: [mbed-tls] support mbedTLS no entropy source
 
Hi all!

I'm Palomo and I've been working with your library a few weeks ago, I'm using Linux kernel 2.60 but my embedded system has a limit entropy source, i now that this is a critical point, but How can I use your library if I want to use a other entropy source? 

Thanks and waiting for you!

--
¡Saludos! Best wishes!

Jesus Palomo

México, D.F.