esp-idf/examples/system/ulp/main/CMakeLists.txt

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CMake
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# Set usual component variables
set(COMPONENT_SRCS "ulp_example_main.c")
set(COMPONENT_ADD_INCLUDEDIRS "")
set(COMPONENT_REQUIRES soc nvs_flash ulp)
register_component()
#
# ULP support additions to component CMakeLists.txt.
#
# 1. The ULP app name must be unique (if multiple components use ULP).
set(ulp_app_name ulp_${COMPONENT_NAME})
#
# 2. Specify all assembly source files.
# Files should be placed into a separate directory (in this case, ulp/),
# which should not be added to COMPONENT_SRCS.
set(ulp_s_sources "ulp/pulse_cnt.S")
#
# 3. List all the component source files which include automatically
# generated ULP export file, ${ulp_app_name}.h:
set(ulp_exp_dep_srcs "ulp_example_main.c")
#
# 4. Call function to build ULP binary and embed in project using the argument
# values above.
ulp_embed_binary(${ulp_app_name} ${ulp_s_sources} ${ulp_exp_dep_srcs})