Make examples standalone buildable via CMake

26 files changed, 101 insertions, 97 deletions

diff --git a/examples/device/CMakeLists.txt b/examples/device/CMakeLists.txt
index 4ed693cde..a0e4600f6 100644
--- a/examples/device/CMakeLists.txt
+++ b/examples/device/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../hw/bsp/family_support.cmake)
 
 project(tinyusb_device_examples)
 family_initialize_project(tinyusb_device_examples ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/audio_4_channel_mic/CMakeLists.txt b/examples/device/audio_4_channel_mic/CMakeLists.txt
index b653fc91f..f6e10e2ea 100644
--- a/examples/device/audio_4_channel_mic/CMakeLists.txt
+++ b/examples/device/audio_4_channel_mic/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/audio_test/CMakeLists.txt b/examples/device/audio_test/CMakeLists.txt
index fac0ca64f..cb321f9a8 100644
--- a/examples/device/audio_test/CMakeLists.txt
+++ b/examples/device/audio_test/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/board_test/CMakeLists.txt b/examples/device/board_test/CMakeLists.txt
index 8cd5b9ea4..37113578e 100644
--- a/examples/device/board_test/CMakeLists.txt
+++ b/examples/device/board_test/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # Check for -DFAMILY=
 if(FAMILY MATCHES "^esp32s[2-3]")
@@ -12,7 +12,6 @@ if(FAMILY MATCHES "^esp32s[2-3]")
   set(TOP "../../..")
   get_filename_component(TOP "${TOP}" REALPATH)
 
-  include(${TOP}/hw/bsp/${FAMILY}/family.cmake)
   project(${PROJECT})
 
 else()
diff --git a/examples/device/cdc_dual_ports/CMakeLists.txt b/examples/device/cdc_dual_ports/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/cdc_dual_ports/CMakeLists.txt
+++ b/examples/device/cdc_dual_ports/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/cdc_msc/CMakeLists.txt b/examples/device/cdc_msc/CMakeLists.txt
index 5da761a04..fa6e83b7e 100644
--- a/examples/device/cdc_msc/CMakeLists.txt
+++ b/examples/device/cdc_msc/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/cdc_msc_freertos/CMakeLists.txt b/examples/device/cdc_msc_freertos/CMakeLists.txt
index 1d04a8518..11f1c6135 100644
--- a/examples/device/cdc_msc_freertos/CMakeLists.txt
+++ b/examples/device/cdc_msc_freertos/CMakeLists.txt
@@ -1,20 +1,17 @@
 cmake_minimum_required(VERSION 3.5)
 
-# use BOARD-Directory name for project id
-get_filename_component(PROJECT ${CMAKE_CURRENT_SOURCE_DIR} NAME)
-set(PROJECT ${BOARD}-${PROJECT})
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
-# TOP is absolute path to root directory of TinyUSB git repo
-set(TOP "../../..")
-get_filename_component(TOP "${TOP}" REALPATH)
+# gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
+family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
 
-# Check for -DFAMILY=
-if(FAMILY MATCHES "^esp32s[2-3]")
-  cmake_minimum_required(VERSION 3.5)
+project(${PROJECT})
 
-  include(${TOP}/hw/bsp/${FAMILY}/family.cmake)
-  project(${PROJECT})
+# Checks this example is valid for the family and initializes the project
+family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
 
+# Check for -DFAMILY=
+if(FAMILY MATCHES "^esp32s[2-3]")
 else()
   message(FATAL_ERROR "Invalid FAMILY specified: ${FAMILY}")
 endif()
diff --git a/examples/device/dfu/CMakeLists.txt b/examples/device/dfu/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/dfu/CMakeLists.txt
+++ b/examples/device/dfu/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/dfu_runtime/CMakeLists.txt b/examples/device/dfu_runtime/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/dfu_runtime/CMakeLists.txt
+++ b/examples/device/dfu_runtime/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/dynamic_configuration/CMakeLists.txt b/examples/device/dynamic_configuration/CMakeLists.txt
index 5da761a04..fa6e83b7e 100644
--- a/examples/device/dynamic_configuration/CMakeLists.txt
+++ b/examples/device/dynamic_configuration/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/hid_composite/CMakeLists.txt b/examples/device/hid_composite/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/hid_composite/CMakeLists.txt
+++ b/examples/device/hid_composite/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/hid_generic_inout/CMakeLists.txt b/examples/device/hid_generic_inout/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/hid_generic_inout/CMakeLists.txt
+++ b/examples/device/hid_generic_inout/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/hid_multiple_interface/CMakeLists.txt b/examples/device/hid_multiple_interface/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/hid_multiple_interface/CMakeLists.txt
+++ b/examples/device/hid_multiple_interface/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/midi_test/CMakeLists.txt b/examples/device/midi_test/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/midi_test/CMakeLists.txt
+++ b/examples/device/midi_test/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/msc_dual_lun/CMakeLists.txt b/examples/device/msc_dual_lun/CMakeLists.txt
index f60be8eda..9e834ae21 100644
--- a/examples/device/msc_dual_lun/CMakeLists.txt
+++ b/examples/device/msc_dual_lun/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/net_lwip_webserver/CMakeLists.txt b/examples/device/net_lwip_webserver/CMakeLists.txt
index f1f79b2d1..7500f6e9e 100644
--- a/examples/device/net_lwip_webserver/CMakeLists.txt
+++ b/examples/device/net_lwip_webserver/CMakeLists.txt
@@ -4,7 +4,7 @@ set(TOP "../../..")
 get_filename_component(TOP "${TOP}" REALPATH)
 
 if (EXISTS ${TOP}/lib/lwip/src)
-    include(${TOP}/hw/bsp/${FAMILY}/family.cmake)
+    include(${TOP}/hw/bsp/family_support.cmake)
 
     # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
     family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/uac2_headset/CMakeLists.txt b/examples/device/uac2_headset/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/uac2_headset/CMakeLists.txt
+++ b/examples/device/uac2_headset/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/usbtmc/CMakeLists.txt b/examples/device/usbtmc/CMakeLists.txt
index 4306da8cb..c49603c26 100644
--- a/examples/device/usbtmc/CMakeLists.txt
+++ b/examples/device/usbtmc/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/device/webusb_serial/CMakeLists.txt b/examples/device/webusb_serial/CMakeLists.txt
index 18367a893..abc4d91da 100644
--- a/examples/device/webusb_serial/CMakeLists.txt
+++ b/examples/device/webusb_serial/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/host/CMakeLists.txt b/examples/host/CMakeLists.txt
index c70d11d5b..f185ac4f8 100644
--- a/examples/host/CMakeLists.txt
+++ b/examples/host/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../hw/bsp/family_support.cmake)
 
 project(tinyusb_host_examples)
 family_initialize_project(tinyusb_host_examples ${CMAKE_CURRENT_LIST_DIR})
diff --git a/examples/host/cdc_msc_hid/CMakeLists.txt b/examples/host/cdc_msc_hid/CMakeLists.txt
index ad0f412e2..0a99bc3a9 100644
--- a/examples/host/cdc_msc_hid/CMakeLists.txt
+++ b/examples/host/cdc_msc_hid/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.5)
 
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/${FAMILY}/family.cmake)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
 
 # gets PROJECT name for the example (e.g. <BOARD>-<DIR_NAME>)
 family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
diff --git a/hw/bsp/esp32s2/family.cmake b/hw/bsp/esp32s2/family.cmake
index 9eb1627a1..f3d41d041 100644
--- a/hw/bsp/esp32s2/family.cmake
+++ b/hw/bsp/esp32s2/family.cmake
@@ -4,7 +4,4 @@ cmake_minimum_required(VERSION 3.5)
 set(EXTRA_COMPONENT_DIRS "src" "${TOP}/hw/bsp/esp32s2/boards" "${TOP}/hw/bsp/esp32s2/components")  
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 set(SUPPORTED_TARGETS esp32s2)
-
-# include basic family CMake functionality
 set(FAMILY_MCUS ESP32S2)
-include(${CMAKE_CURRENT_LIST_DIR}/../family_common.cmake)
diff --git a/hw/bsp/esp32s3/family.cmake b/hw/bsp/esp32s3/family.cmake
index c99c3728b..511dd58bb 100644
--- a/hw/bsp/esp32s3/family.cmake
+++ b/hw/bsp/esp32s3/family.cmake
@@ -4,7 +4,4 @@ cmake_minimum_required(VERSION 3.5)
 set(EXTRA_COMPONENT_DIRS "src" "${TOP}/hw/bsp/esp32s3/boards" "${TOP}/hw/bsp/esp32s3/components")  
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 set(SUPPORTED_TARGETS esp32s3)
-
-# include basic family CMake functionality
 set(FAMILY_MCUS ESP32S3)
-include(${CMAKE_CURRENT_LIST_DIR}/../family_common.cmake)
diff --git a/hw/bsp/family_common.cmake b/hw/bsp/family_common.cmake
deleted file mode 100644
index 2544c58c6..000000000
--- a/hw/bsp/family_common.cmake
+++ /dev/null
@@ -1,57 +0,0 @@
-if (NOT FAMILY_MCUS)
-    set(FAMILY_MCUS ${FAMILY})
-endif()
-
-# save it in case of re-inclusion
-set(FAMILY_MCUS ${FAMILY_MCUS} CACHE INTERNAL "")
-
-function(family_filter RESULT DIR)
-    get_filename_component(DIR ${DIR} ABSOLUTE BASE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
-    file(GLOB ONLYS "${DIR}/.only.MCU_*")
-    if (ONLYS)
-        foreach(MCU IN LISTS FAMILY_MCUS)
-            if (EXISTS ${DIR}/.only.MCU_${MCU})
-                set(${RESULT} 1 PARENT_SCOPE)
-                return()
-            endif()
-        endforeach()
-    else()
-        foreach(MCU IN LISTS FAMILY_MCUS)
-            if (EXISTS ${DIR}/.skip.MCU_${MCU})
-                set(${RESULT} 0 PARENT_SCOPE)
-                return()
-            endif()
-        endforeach()
-    endif()
-    set(${RESULT} 1 PARENT_SCOPE)
-endfunction()
-
-function(family_add_subdirectory DIR)
-    family_filter(SHOULD_ADD "${DIR}")
-    if (SHOULD_ADD)
-        add_subdirectory(${DIR})
-    endif()
-endfunction()
-
-function(family_get_project_name OUTPUT_NAME DIR)
-    get_filename_component(SHORT_NAME ${DIR} NAME)
-    set(${OUTPUT_NAME} ${TINYUSB_FAMILY_PROJECT_NAME_PREFIX}${SHORT_NAME} PARENT_SCOPE)
-endfunction()
-
-function(family_initialize_project PROJECT DIR)
-    family_filter(ALLOWED "${DIR}")
-    if (NOT ALLOWED)
-        get_filename_component(SHORT_NAME ${DIR} NAME)
-        message(FATAL_ERROR "${SHORT_NAME} is not supported on FAMILY=${FAMILY}")
-    endif()
-endfunction()
-
-# configure an executable target to link to tinyusb in device mode, and add the board implementation
-function(family_configure_device_example TARGET)
-    # default implentation is empty, the function should be redefined in the FAMILY/family.cmake
-endfunction()
-
-# configure an executable target to link to tinyusb in host mode, and add the board implementation
-function(family_configure_host_example TARGET)
-    # default implentation is empty, the function should be redefined in the FAMILY/family.cmake
-endfunction()
diff --git a/hw/bsp/family_support.cmake b/hw/bsp/family_support.cmake
new file mode 100644
index 000000000..af0e00b2d
--- /dev/null
+++ b/hw/bsp/family_support.cmake
@@ -0,0 +1,71 @@
+if (NOT TARGET _family_support_marker)
+    add_library(_family_support_marker INTERFACE)
+
+    if (NOT FAMILY)
+        message(FATAL_ERROR "You must set a FAMILY variable for the build (e.g. rp2040, eps32s2, esp32s3). You can do this via -DFAMILY=xxx on the camke command line")
+    endif()
+
+    if (NOT EXISTS ${CMAKE_CURRENT_LIST_DIR}/${FAMILY}/family.cmake)
+        message(FATAL_ERROR "Family '${FAMILY}' is not known/supported")
+    endif()
+
+    function(family_filter RESULT DIR)
+        get_filename_component(DIR ${DIR} ABSOLUTE BASE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+        file(GLOB ONLYS "${DIR}/.only.MCU_*")
+        if (ONLYS)
+            foreach(MCU IN LISTS FAMILY_MCUS)
+                if (EXISTS ${DIR}/.only.MCU_${MCU})
+                    set(${RESULT} 1 PARENT_SCOPE)
+                    return()
+                endif()
+            endforeach()
+        else()
+            foreach(MCU IN LISTS FAMILY_MCUS)
+                if (EXISTS ${DIR}/.skip.MCU_${MCU})
+                    set(${RESULT} 0 PARENT_SCOPE)
+                    return()
+                endif()
+            endforeach()
+        endif()
+        set(${RESULT} 1 PARENT_SCOPE)
+    endfunction()
+
+    function(family_add_subdirectory DIR)
+        family_filter(SHOULD_ADD "${DIR}")
+        if (SHOULD_ADD)
+            add_subdirectory(${DIR})
+        endif()
+    endfunction()
+
+    function(family_get_project_name OUTPUT_NAME DIR)
+        get_filename_component(SHORT_NAME ${DIR} NAME)
+        set(${OUTPUT_NAME} ${TINYUSB_FAMILY_PROJECT_NAME_PREFIX}${SHORT_NAME} PARENT_SCOPE)
+    endfunction()
+
+    function(family_initialize_project PROJECT DIR)
+        family_filter(ALLOWED "${DIR}")
+        if (NOT ALLOWED)
+            get_filename_component(SHORT_NAME ${DIR} NAME)
+            message(FATAL_ERROR "${SHORT_NAME} is not supported on FAMILY=${FAMILY}")
+        endif()
+    endfunction()
+
+    # configure an executable target to link to tinyusb in device mode, and add the board implementation
+    function(family_configure_device_example TARGET)
+        # default implentation is empty, the function should be redefined in the FAMILY/family.cmake
+    endfunction()
+
+    # configure an executable target to link to tinyusb in host mode, and add the board implementation
+    function(family_configure_host_example TARGET)
+        # default implentation is empty, the function should be redefined in the FAMILY/family.cmake
+    endfunction()
+
+    include(${CMAKE_CURRENT_LIST_DIR}/${FAMILY}/family.cmake)
+
+    if (NOT FAMILY_MCUS)
+        set(FAMILY_MCUS ${FAMILY})
+    endif()
+
+    # save it in case of re-inclusion
+    set(FAMILY_MCUS ${FAMILY_MCUS} CACHE INTERNAL "")
+endif()
\ No newline at end of file
diff --git a/hw/bsp/rp2040/family.cmake b/hw/bsp/rp2040/family.cmake
index 752eb0cab..41960b6cd 100644
--- a/hw/bsp/rp2040/family.cmake
+++ b/hw/bsp/rp2040/family.cmake
@@ -3,7 +3,8 @@ if (NOT TARGET _rp2040_family_inclusion_marker)
 	add_library(_rp2040_family_inclusion_marker INTERFACE)
 
 	if (NOT BOARD)
-		message(FATAL_ERROR "BOARD must be specified")
+		message("BOARD not specified, defaulting to pico_sdk")
+		set(BOARD pico_sdk)
 	endif()
 
 	# add the SDK in case we are standalone tinyusb example (noop if already present)
@@ -11,7 +12,6 @@ if (NOT TARGET _rp2040_family_inclusion_marker)
 
 	# include basic family CMake functionality
 	set(FAMILY_MCUS RP2040)
-	include(${CMAKE_CURRENT_LIST_DIR}/../family_common.cmake)
 
 	include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)