Arjun-NA/RTOS_FreeRtos

Learning Free RTOS using STM32F446RE

RTOS_FreeRtos

Mastering Free RTOS using STM32F446RE

Prerequisites

• Familiarity with STM32 IDEs
• Open minded to read and do installations on your own

I. Gathering Files and Softwares

• Download FreeRTOS
• Download STM Workbench
• Download Standard Peripheral Files { Included in the repository}

II. Create a New project in Workbench

1.  Create a WorkSpace and select the workspace as the stm32 workbench loads.
   

2.  Create a New project as per the following image
   

   

3.  Select following
    - Project type 		: Empty Project
    - Toolchains 		: Ac6 STM32 MCU GCC
    - Next - > Next ->
    - Board : select correct board which you are using. I use STM32F446RE
    - Next ->
    - No Firmware (If you know to include Std Periph from that option, Great! I couldnt get it working)
    - Finish
   

   

4.  Delete these from the Project folder (i) inc	(ii) src (iii) startup
    Copy (i) inc	(ii) src (iii) startup (iv) CMSIS (v) StdPeriph_Driver to the Project folder from StdPeriph_files folder
   

5.  Right click on each folder in the project -> select `properties` -> 
    under `C/C++ Build` -> Uncheck `Exclude resource from build` if checked.
   

6.  Right click on project -> select `properties` -> under `C/C++ Build` -> `Settings` ->
    `MCU GCC Compiler` -> `Includes`		(See following image) 
    add inc,config,CMSIS/core,CMSIS/device/,StdPeriph_Driver/inc  by selecting workspace and navigating it by yourself.
   

   

7. Creating empty RTOS project with necessary files : Create folders as per following Tree

   ├───CMSIS
   │   ├───core
   │   └───device
   ├───Config (create this folder)
   ├───inc
   ├───src
   ├───startup
   ├───StdPeriph_Driver
   │   ├───inc
   │   └───src
   └───Third_party (create this folder)
       └───FreeRTOS (create this folder)
           └───org (create this folder)
               ├───License (Copy from FreeRTOS)
               └───Source (Copy from FreeRTOS)
                   ├───include
                   └───portable
                       ├───GCC		(Keep just these)
                       │   └───ARM_CM4F (Keep only what is needed)
                       └───MemMang (Keep just these)
   

III. Build

Common Build Errors

• File not found:

  1.  See if includes are proper, whether any folders are exculded from build.
     

  2.  check if your environmental variable PATH is having Arm gcc compiler path
      *How to?* : open cmd; type "arm-none-eabi-gcc" ; It should say no imput file; 
      Not 'command not found'  
     

  3.  Check if any files show error when you open in editor, if so resolve.
     

  4.  One Interesting error i faced: #include <stdio.h> not recognised 
      Solution: Either reinstall the compiler OR
      What I did: cmd type:"where arm-none-eabi-gcc"; 
      Go to location-> one folder backwards -> look for arm-none-eabi/include -> see if 
      stdio.h is there. (It should be else reinstall.) Add this path to the environment 
      variable PATH; (Sometimes only this works) Alternatively edit:
      Project properties-> C/C++ Build -> Environment -> PATH ;
      Analyse and correct this path. Please have a backup of the PATH before editing.
     

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Miscellaneous

• should have Arm compiler if not refer here and download link is here

• Markdown Cheat Sheet