Build a minimal multi-tasking OS kernel for ARM from scratch

Prerequisites

• QEMU with an STM32 microcontroller implementation
• GNU Toolchain for ARM

Steps

• 01-HelloWorld
  • Enable STM32 USART to print trivial greetings
• 02-ContextSwitch-1
  • Basic switch between user and kernel mode
• 03-ContextSwitch-2
  • system call is introduced as an effective method to return to kernel
• 04-Multitasking
  • Two user tasks are interatively switching
• 05-TimerInterrupt
  • Enable SysTick for future scheduler implementation
• 06-Preemptive
  • Basic preemptive scheduling

Building and Verification

$ make $ make qemu

Reference

• Baking Pi – Operating Systems Development