make platform zephyr stand alone (#19504)

build_overrides/zephyr.gni

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+# Copyright (c) 2021 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# place holder

config/zephyr/README.md

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+# Zephyr build and configuration files
+
+This directory contains build scripts and common configuration files used by
+CHIP Zephyr applications. It is structured as follows:
+
+| File/Folder | Contents                                                                                                                            |
+| ----------- | ----------------------------------------------------------------------------------------------------------------------------------- |
+| chip-gn     | GN project used to build selected CHIP libraries with the _Zephyr_ platform integration layer                                       |
+| chip-module | CMake wrapper for the GN project defined in `chip-gn` directory, and other components that allow one to use CHIP as a Zephyr module |
+| app         | Common and optional Kconfig configuration files that can be used in Zephyr applications                                             |

config/zephyr/app/copy-flashbundle-firmware.cmake

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+#
+#   Copyright (c) 2022 Project CHIP Authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+
+# Copy the merged.hex file if it exists, otherwise copy zephyr.hex
+
+set(HEX_NAME merged.hex)
+
+if(EXISTS "zephyr/${HEX_NAME}")
+  configure_file("zephyr/${HEX_NAME}" "${FLASHBUNDLE_FIRMWARE}" COPYONLY)
+else()
+  configure_file("zephyr/${KERNEL_HEX_NAME}" "${FLASHBUNDLE_FIRMWARE}" COPYONLY)
+endif()

config/zephyr/app/enable-gnu-std.cmake

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+add_library(gnu17 INTERFACE)
+target_compile_options(gnu17
+    INTERFACE 
+        $<$<COMPILE_LANGUAGE:CXX>:-std=gnu++17>
+        -D_SYS__PTHREADTYPES_H_)
+target_link_libraries(app PRIVATE gnu17)

config/zephyr/app/flashing.cmake

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+#
+#   Copyright (c) 2021 Project CHIP Authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+
+# Adds rules to generate a flashing wrapper script for an nrfconnect firmware.
+
+set(FLASHBUNDLE_FLASHER_COMMON ${CMAKE_PROJECT_NAME}/firmware_utils.py)
+set(FLASHBUNDLE_FLASHER_PLATFORM ${CMAKE_PROJECT_NAME}/nrfconnect_firmware_utils.py)
+set(FLASHBUNDLE_FLASHER_WRAPPER ${CMAKE_PROJECT_NAME}/${CMAKE_PROJECT_NAME}.flash.py)
+set(FLASHBUNDLE_FIRMWARE ${CMAKE_PROJECT_NAME}/${CMAKE_PROJECT_NAME}.hex)
+set(FLASHBUNDLE_FILES ${FLASHBUNDLE_FLASHER_COMMON} ${FLASHBUNDLE_FLASHER_PLATFORM} ${FLASHBUNDLE_FLASHER_WRAPPER} ${FLASHBUNDLE_FIRMWARE})
+
+get_filename_component(FLASHBUNDLE_FIRMWARE_BASENAME ${FLASHBUNDLE_FIRMWARE} NAME)
+
+list(JOIN FLASHBUNDLE_FILES "\n" FLASHBUNDLE_MANIFEST)
+
+file(GENERATE
+  OUTPUT ${CMAKE_PROJECT_NAME}.flashbundle.txt
+  CONTENT "${FLASHBUNDLE_MANIFEST}\n"
+  )
+
+add_custom_command(OUTPUT "${FLASHBUNDLE_FLASHER_COMMON}"
+    COMMAND ${CMAKE_COMMAND} ARGS -E copy "${PROJECT_SOURCE_DIR}/third_party/connectedhomeip/scripts/flashing/firmware_utils.py" "${FLASHBUNDLE_FLASHER_COMMON}"
+    VERBATIM)
+
+add_custom_command(OUTPUT "${FLASHBUNDLE_FLASHER_PLATFORM}"
+    COMMAND ${CMAKE_COMMAND} ARGS -E copy "${PROJECT_SOURCE_DIR}/third_party/connectedhomeip/scripts/flashing/nrfconnect_firmware_utils.py" "${FLASHBUNDLE_FLASHER_PLATFORM}"
+    VERBATIM)
+
+add_custom_command(OUTPUT "${FLASHBUNDLE_FIRMWARE}"
+    DEPENDS zephyr/${KERNEL_HEX_NAME}
+    COMMAND ${CMAKE_COMMAND} ARGS -DFLASHBUNDLE_FIRMWARE=${FLASHBUNDLE_FIRMWARE} -DKERNEL_HEX_NAME=${KERNEL_HEX_NAME} -P "${CHIP_ROOT}/config/nrfconnect/app/copy-flashbundle-firmware.cmake"
+    VERBATIM)
+
+add_custom_command(OUTPUT "${CMAKE_PROJECT_NAME}/${CMAKE_PROJECT_NAME}.flash.py"
+    COMMAND ${python}
+            "${PROJECT_SOURCE_DIR}/third_party/connectedhomeip/scripts/flashing/gen_flashing_script.py" nrfconnect
+            --output "${FLASHBUNDLE_FLASHER_WRAPPER}"
+            --application "${FLASHBUNDLE_FIRMWARE_BASENAME}"
+    COMMENT "To flash ${FLASHBUNDLE_FIRMWARE_BASENAME} run ${FLASHBUNDLE_FLASHER_WRAPPER}"
+    VERBATIM)
+
+add_custom_target(flashing_script DEPENDS ${FLASHBUNDLE_FILES})

config/zephyr/app/overlay-usb_support.conf

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+#
+#   Copyright (c) 2020 Project CHIP Authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+
+CONFIG_GPIO=y
+
+CONFIG_USB=y
+CONFIG_USB_DEVICE_STACK=y
+CONFIG_USB_UART_CONSOLE=y
+
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_UART_LINE_CTRL=y

config/zephyr/chip-gn/.gn

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+# Copyright (c) 2020 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//build_overrides/build.gni")
+import("//build_overrides/chip.gni")
+
+# The location of the build configuration file.
+buildconfig = "${build_root}/config/BUILDCONFIG.gn"
+
+# CHIP uses angle bracket includes.
+check_system_includes = true
+
+default_args = {
+  target_cpu = ""
+  target_os = "zephyr"
+
+  import("${chip_root}/config/zephyr/chip-gn/args.gni")
+}

config/zephyr/chip-gn/BUILD.gn

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+# Copyright (c) 2020 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//build_overrides/build.gni")
+import("//build_overrides/chip.gni")
+
+import("${chip_root}/build/chip/tests.gni")
+
+assert(current_os == "zephyr")
+
+declare_args() {
+  chip_build_example_providers = false
+}
+
+group("zephyr") {
+  deps = [ "${chip_root}/src/lib" ]
+
+  if (chip_build_tests) {
+    deps += [ "${chip_root}/src:tests" ]
+  }
+
+  if (chip_build_example_providers) {
+    deps += [ "${chip_root}/examples/providers:device_info_provider" ]
+  }
+}
+
+group("default") {
+  deps = [ ":zephyr" ]
+}

config/zephyr/chip-gn/args.gni

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+# Copyright (c) 2020 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//build_overrides/chip.gni")
+
+chip_device_platform = "zephyr"
+
+chip_build_tests = false
+
+chip_project_config_include = ""
+chip_system_project_config_include = ""
+chip_ble_project_config_include = ""
+
+custom_toolchain = "${chip_root}/config/zephyr/chip-gn/toolchain:zephyr"
+
+pw_build_PIP_CONSTRAINTS = [ "${chip_root}/scripts/constraints.txt" ]

config/zephyr/chip-gn/toolchain/BUILD.gn

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+# Copyright (c) 2020 Project CHIP Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//build/toolchain/gcc_toolchain.gni")
+import("//build_overrides/build.gni")
+
+declare_args() {
+  zephyr_ar = ""
+  zephyr_cc = ""
+  zephyr_cxx = ""
+}
+
+gcc_toolchain("zephyr") {
+  ar = zephyr_ar
+  cc = zephyr_cc
+  cxx = zephyr_cxx
+
+  toolchain_args = {
+    current_os = "zephyr"
+    is_clang = false
+  }
+}