1# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
2
3# This can be dropped into an external project to help locate this SDK
4# It should be include()ed prior to project()
5
6if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
7    set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
8    message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
9endif ()
10
11if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
12    set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
13    message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
14endif ()
15
16if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
17    set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
18    message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
19endif ()
20
21if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_TAG} AND (NOT PICO_SDK_FETCH_FROM_GIT_TAG))
22    set(PICO_SDK_FETCH_FROM_GIT_TAG $ENV{PICO_SDK_FETCH_FROM_GIT_TAG})
23    message("Using PICO_SDK_FETCH_FROM_GIT_TAG from environment ('${PICO_SDK_FETCH_FROM_GIT_TAG}')")
24endif ()
25
26if (PICO_SDK_FETCH_FROM_GIT AND NOT PICO_SDK_FETCH_FROM_GIT_TAG)
27  set(PICO_SDK_FETCH_FROM_GIT_TAG "master")
28  message("Using master as default value for PICO_SDK_FETCH_FROM_GIT_TAG")
29endif()
30
31set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
32set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
33set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
34set(PICO_SDK_FETCH_FROM_GIT_TAG "${PICO_SDK_FETCH_FROM_GIT_TAG}" CACHE FILEPATH "release tag for SDK")
35find_package(Git)
36set(PICO_SDK_PATCH_COMMAND ${GIT_EXECUTABLE} reset --hard --quiet && ${GIT_EXECUTABLE} apply "${CMAKE_CURRENT_LIST_DIR}/pico-sdk.patch")
37
38if (NOT PICO_SDK_PATH)
39    if (PICO_SDK_FETCH_FROM_GIT)
40        include(FetchContent)
41        set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
42        if (PICO_SDK_FETCH_FROM_GIT_PATH)
43            get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
44        endif ()
45        # GIT_SUBMODULES_RECURSE was added in 3.17
46        if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0")
47            FetchContent_Declare(
48                    pico_sdk
49                    GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
50                    GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
51                    GIT_SUBMODULES_RECURSE FALSE
52                    PATCH_COMMAND ${PICO_SDK_PATCH_COMMAND}
53            )
54        else ()
55            FetchContent_Declare(
56                    pico_sdk
57                    GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
58                    GIT_TAG ${PICO_SDK_FETCH_FROM_GIT_TAG}
59                    PATCH_COMMAND ${PICO_SDK_PATCH_COMMAND}
60            )
61        endif ()
62
63        if (NOT pico_sdk)
64            message("Downloading Raspberry Pi Pico SDK")
65            FetchContent_Populate(pico_sdk)
66            set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
67        endif ()
68        set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
69    else ()
70        message(FATAL_ERROR
71                "SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
72                )
73    endif ()
74endif ()
75
76get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
77if (NOT EXISTS ${PICO_SDK_PATH})
78    message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
79endif ()
80
81set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
82if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
83    message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
84endif ()
85
86set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
87
88include(${PICO_SDK_INIT_CMAKE_FILE})
89