code reorganized

CMakeLists.txt

@@ -25,10 +25,9 @@ pico_sdk_init()
 
 # Add executable. Default name is the project name, version 0.1
 
-add_executable(pico_keyer
-  pico_keyer.cpp
-  settings.cpp
-)
+add_executable(pico_keyer)
+
+add_subdirectory(src)
 
 pico_set_program_name(pico_keyer "pico_keyer")
 pico_set_program_version(pico_keyer "0.1")

src/CMakeLists.txt

@@ -0,0 +1,4 @@
+target_sources(pico_keyer PRIVATE
+    pico_keyer.cpp
+    settings.cpp
+)