As known, the STM32MP115x SoC is powered by a heterogeneous architecture comprising a single/dual ARM Cortex-A7 (CA7) and an ARM Cortex-M4 (CM4). When the application requires implementing an [https://en.wikipedia.org/wiki/Asymmetric_multiprocessing Asymmetric Multiprocessing configuration (AMP)], the most common scenario is to use Linux on the CA7, and bare metal or RTOS-based firmware on the CM4. In either case, the [https://www.openampproject.org/ OpenAMP framework] is typically used to establish a [https://wiki.st.com/stm32mpu/wiki/Coprocessor_management_overview communication channel between the cores]. The [[DESK-MP1-L/Development/Building the Yocto BSP|Yocto build system ]] at the heart of the DESK-MP1-L provides some examples based on OpenAMP to demonstrate how to set up AMP configurations. The following section illustrates one of them, namely <code>OpenAMP_TTY_echo</code>. This example is built when Yocto is run to generate the Linux root file system for the target.