TrustZone security is activated (Option bit TZEN=B4).</p>
<p>At the beginning of the main program, the HAL_Init() function is called to reset
all the peripherals, initialize the Flash interface and the systick.</p>
<p>The SystemClock_Config() function is used to configure the system clock (SYSCLK)</p>
<p>This project is composed of two sub-projects:  </p>
<ul>
<li><p>One for the secure application part (Project_s)  </p>
</li>
<li><p>One for the non-secure application part (Project_ns).</p>
</li>
</ul>
<p>Pl