Update README.md

Makefile

@@ -20,6 +20,7 @@ DIRS := $(shell ls -R components application -Icubemx | grep : | sed 's/://')
 CBMXDIRS := $(shell ls -R $(CBMXDIR) | grep : | sed 's/://')
 CBMXASRC := $(wildcard $(addsuffix /*.s, $(CBMXDIR)))
 CBMXLD := $(wildcard $(addsuffix /*.ld, $(CBMXDIR)))
+CBMXOBJS := $(wildcard $(addsuffix /*.o, $(CBMXDIR)/build))
 
 APPLASRC := $(wildcard $(addsuffix /*.s, $(DIRS)))
 APPLCSRC := $(wildcard $(addsuffix /*.c, $(DIRS)))
@@ -86,20 +87,17 @@ MAKEFLAGS += --no-print-directory -j
 ###############################################################################
 
 all: build
-build: application
-application: $(OUTDIR)/$(PROJNAME).elf \
-             $(OUTDIR)/$(PROJNAME).bin \
+build: cubemx application
+cubemx:
+	@cd $(CBMXDIR) && $(MAKE) -j -s
+application: $(OUTDIR)/$(PROJNAME).bin \
              $(OUTDIR)/$(PROJNAME).siz
 
 # Rebuild project if Makefile changed
 $(APPLOBJS): $(firstword $(MAKEFILE_LIST))
 
-cubemx:
-	@cd $(CBMXDIR) && $(MAKE) -j -s
-
-$(OUTDIR)/$(PROJNAME).elf: cubemx $(APPLOBJS)
+$(OUTDIR)/$(PROJNAME).elf: $(APPLOBJS)
 	@echo linker: $@
-	$(eval CBMXOBJS = $(wildcard $(addsuffix /*.o, $(CBMXDIR)/build)))
 	@$(CC) $(LDFLAGS) $(CBMXOBJS) $(APPLOBJS) $(LIBDIRS) $(LIBS) -o $@
 
 $(OUTDIR)/$(PROJNAME).bin: $(OUTDIR)/$(PROJNAME).elf
@@ -132,6 +130,7 @@ clean:
 	rm -rf $(OUTDIR)
 
 # Dependencies
+-include $(CBMXOBJS:.o=.d)
 -include $(APPLOBJS:.o=.d)
 
 ###############################################################################

README.md

@@ -3,8 +3,9 @@
 This example provides the ability to configure components and application
 using kconfig language
 ![](scripts/menu/menuconfig.png)
-Originally created for STM32 microcontrollers but it can be used for any ARM
+Originally created for STM32 Black Pill but it can be used for any ARM
 based MCUs
+<img src="scripts/menu/blackpill.jpeg" width="640" height="245">
 
 Development environment consists of:
  * Ubuntu OS
@@ -24,12 +25,13 @@ Development environment consists of:
 
 ```bash
   sudo apt install gcc-arm-none-eabi
-
+```
+```bash
   arm-none-eabi-gcc --version
 ```
 
-Alternative way is to download GNU Arm Embedded Toolchain from the
-website https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads
+Alternative way is to download
+[Arm GNU Toolchain](https://developer.arm.com/Tools%20and%20Software/GNU%20Toolchain)
 and setup path to compiler binaries by adding the following line
 into ~/.profile with your path to toolchain folder:
 
@@ -43,30 +45,34 @@ Log out and log back in to update PATH variable
 
 ```bash
   git clone https://github.com/mcu/kconfig.git
-
+```
+```bash
   cd kconfig
   make menuconfig
   make
+```bash
+  make clean
+  make -f scripts/Makefile clean
 ```
 
 ## How it works
 
-At first, "make" utility use "ls" command recursively to create a list of all
-folders in the "components", "application". Then "make" creates a list of all
-*.s, *.c, *.ld and *.a files in the project (ASSOURCES, CSOURCES, LINKERS, LIBS).
-After that "make" starts the process of compiling, linking and generating the
-binary file. It's easy but more correctly is to build components separately into
-libraries
+At first, 'make' utility use 'ls' command recursively to create a list of all
+folders in the 'components', 'application'. Then 'make' creates a list of all
+*.s, *.c, *.ld and *.a files into variables CBMXASRC, CBMXLD, CBMXOBJS...
+After that 'make' starts the process of compiling cubemx, components,
+application sorce files in parallel, linking and generating binary file.
+It's easy but more correctly is to build components separately into
+libraries (for advanced developers https://github.com/mcu/kconfig-libs).
 
-You can add *.h, *.c files and folders as you want into "components",
-"application" folders. All source files will be compiled
+You can change cubemx source files using STM32CubeMX program or replace cubemx
+folder with your own, small changes need to be made to the Makefile.
 
-## For advanced developers
-
-https://github.com/mcu/kconfig-libs
+You can also add *.h, *.c files and folders as you want into "components",
+"application" folders. All source files will be compiled
 
 ## Comment
 
-The implementation of makefile has its pros and cons. Since all header files
+Implementation of makefile has its pros and cons. Since all header files
 are visible to each source file during the build process it is not recommended
 to use this example for large projects