STM32F411 Bare-Metal Startup & Linker Script

Overview

This repository demonstrates a bare-metal STM32F411 project focusing on ARM Cortex-M startup code and GNU LD linker script implementation.

All build steps are executed manually using the GNU ARM Embedded Toolchain. STM32CubeIDE is used only as a code editor.

Target

• MCU: STM32F411RE
• Core: ARM Cortex-M4

Repository Structure

• startup/ : Cortex-M startup code (vector table, Reset_Handler)
• linker/ : Custom GNU LD linker script defining memory layout
• src/ : Application entry point (main.c)
• docs/ : Build commands and notes

Build Process

• Compilation: arm-none-eabi-gcc
• Linking: arm-none-eabi-ld
• Inspection: arm-none-eabi-objdump, .map file analysis

Key Learning Outcomes

• Understanding Cortex-M boot sequence
• FLASH/RAM memory mapping
• Symbol communication between linker and startup code
• Manual control of the build process