ARM Cortex-M MPU Explained – Registers, Programming Model & STM32 Example
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About this video:
In this video, we dive deep into the ARM Cortex-M Memory Protection Unit (MPU) — what it is, why it’s important, and how to use it in your embedded applications. Whether you’re a beginner learning about ARM architecture or an experienced embedded engineer, this tutorial will guide you through the MPU step-by-step.
What you’ll learn in this video:
What is the MPU? – Purpose and benefits in embedded systems.
How the MPU works – Memory regions, access permissions, and execution control.
MPU register description – Detailed explanation of key MPU registers (e.g., MPU_TYPE, MPU_CTRL, MPU_RNR, MPU_RBAR, MPU_RASR).
MPU programming model – How the CPU interacts with the MPU.
Example: Configuring MPU on STM32 – Step-by-step code demonstration to set up MPU regions using STM32 HAL/LL or CMSIS.
Code Example Highlights:
Defining MPU regions for Flash, SRAM, and peripheral space.
Setting access permissions (read/write/execute).
Enabling the MPU with privileged/unprivileged access separation.
Testing MPU fault generation.
Resources & Links:
📄 ARM Cortex-M Technical Reference Manual – MPU section
📄 STM32 Reference Manual for your MCU
Timestamps:
00:00 Introduction and MPU Overview
02:29 RTOS and MPU Functional Overview
03:59 MPU programming Model
06:50 Registers Description
09:48 MPU Programming Example on STM32
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#ARM #CortexM #STM32 #MPU #EmbeddedSystems #Microcontroller #BareMetalProgramming