Alex Tech: post #150 — TG.ME

Many engineers say they are "running Linux on a microcontroller," but in reality, most microcontrollers cannot run standard Linux at all. Why? 🤔 Linux requires a hardware feature called an MMU (Memory Management Unit) for virtual memory, process isolation, and memory protection. Most popular MCUs, including STM32, ESP32, and AVR devices, don't have an MMU. That's why microcontrollers typically run: ✅ Bare-metal firmware ✅ FreeRTOS ✅ Zephyr ✅ ThreadX Instead of Linux. 💡The STM32 family is a great example of this distinction. While an STM32F4 or STM32H7 cannot run Linux, the STM32MP1 series includes Cortex-A cores with an MMU, allowing it to run Embedded Linux alongside a Cortex-M core for real-time tasks. This means you can run Linux and FreeRTOS on the same chip at the same time! #EmbeddedSystems #EmbeddedLinux #STM32 #RTOS #FreeRTOS #Firmware #Electronics #IoT