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annotate pico_sdk_import.cmake @ 30:92fdf2ef995d default tip

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Use 32 bit rather than 16 bit ints for loop vars. No risk of overflow and is actually faster.
author Daniel O'Connor <darius@dons.net.au>
date Thu, 27 Feb 2025 15:24:17 +1030
parents 2db42eaba3c8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
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2
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3 # This can be dropped into an external project to help locate this SDK
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4 # It should be include()ed prior to project()
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5
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6 if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
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7 set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
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8 message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
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9 endif ()
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10
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11 if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
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12 set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
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13 message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
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14 endif ()
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15
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16 if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
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17 set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
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18 message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
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19 endif ()
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20
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21 set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
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22 set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
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23 set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
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24
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25 if (NOT PICO_SDK_PATH)
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26 if (PICO_SDK_FETCH_FROM_GIT)
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27 include(FetchContent)
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28 set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
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29 if (PICO_SDK_FETCH_FROM_GIT_PATH)
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30 get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
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31 endif ()
5
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32 # GIT_SUBMODULES_RECURSE was added in 3.17
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33 if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0")
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34 FetchContent_Declare(
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35 pico_sdk
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36 GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
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37 GIT_TAG master
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38 GIT_SUBMODULES_RECURSE FALSE
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39 )
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40 else ()
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41 FetchContent_Declare(
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42 pico_sdk
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43 GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
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44 GIT_TAG master
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45 )
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46 endif ()
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47
0
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48 if (NOT pico_sdk)
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49 message("Downloading Raspberry Pi Pico SDK")
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50 FetchContent_Populate(pico_sdk)
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51 set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
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52 endif ()
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53 set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
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54 else ()
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55 message(FATAL_ERROR
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56 "SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
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57 )
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58 endif ()
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59 endif ()
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60
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61 get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
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62 if (NOT EXISTS ${PICO_SDK_PATH})
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63 message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
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64 endif ()
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65
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66 set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
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67 if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
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68 message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
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69 endif ()
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70
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71 set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
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72
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73 include(${PICO_SDK_INIT_CMAKE_FILE})