more ci test

examples/make.mk

@@ -77,10 +77,9 @@ endif
 ifeq ($(CMDEXE),1)
   CP = copy
   RM = del
+  MKDIR = mkdir
   PYTHON = python
-  MKDIR = cmd /e /c mkdir
 else
-  SED = sed
   CP = cp
   RM = rm
   MKDIR = mkdir

examples/rules.mk

@@ -265,7 +265,11 @@ debug-bmp: $(BUILD)/$(PROJECT).elf
 
 # Create binary directory
 $(BIN):
+ifeq ($(CMDEXE),1)
+	@$(MKDIR) $(subst /,\,$@)
+else
 	@$(MKDIR) -p $@
+endif
 
 # Copy binaries .elf, .bin, .hex, .uf2 to BIN for upload
 # due to large size of combined artifacts, only uf2 is uploaded for now