Writing Makefiles for firmware projects

The focus of this section is to write a Makefile and successfully test it. Let’s begin.

In our workspace folder, let’s make a new folder named 4_Makefiles. In this folder, create a file called Makefile. This file must start with a capital M and should have no extension.

If you’re using Windows and it asks whether you really want to change the file extension, click Yes. Then, right-click the file and open it with a basic text editor, such as Notepad++.

Our objectives with the Makefile can be summarized as follows:

1. The compilation of source code: We want to compile source files (main.c and stm32f411_startup.c) into object files (main.o and stm32f411_startup.o).
2. Linking object files into an executable: Then, link the compiled object files, along with setting a specific memory layout using the linker script, (stm32_ls.ld) to create a final executable (4_makefile_project.elf).
3. Loading and cleaning:
   1. Invoke...