Source tree restructured.

Now, root is google test. all Rpi code is in the rpi subdirectory.

Author: suikan4github

CMakeLists.txt

@@ -1,49 +1,25 @@
-#[[
-Copyright 2020 (c) 2020 Raspberry Pi (Trading) Ltd.
+# To use FetchContent, we need CMake 3.14 or newer. 
+cmake_minimum_required(VERSION 3.14)
 
-Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
-following conditions are met:
+# Redefine project for testing.
+project(test_i2s)
 
-1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
-   disclaimer.
+# Enable test to let the VS code find the test.
+include(CTest)
+enable_testing()
 
-2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
-   disclaimer in the documentation and/or other materials provided with the distribution.
 
-3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products
-   derived from this software without specific prior written permission.
+# GoogleTest requires at least C++14
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
-INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-]]
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  URL https://github.com/google/googletest/archive/refs/tags/v1.14.0.zip)
+# For Windows: Prevent overriding the parent project's compiler/linker settings
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+FetchContent_MakeAvailable(googletest)
 
-# The first part of the CMakeLists.txt which download SDK automatically. 
+add_subdirectory(test)
 
-# The original of this file can be found at : 
-# https://github.com/raspberrypi/pico-sdk/blob/master/README.md
-
-cmake_minimum_required(VERSION 3.13)
-
-# initialize pico-sdk from GIT
-# (note this can come from environment, CMake cache etc)
-set(PICO_SDK_FETCH_FROM_GIT on)
-
-# pico_sdk_import.cmake is a single file copied from this SDK
-# note: this must happen before project()
-include(pico_sdk_import.cmake)
-
-# initialize the Raspberry Pi Pico SDK
-pico_sdk_init()
-
-# rest of your project
-project(pico_duplex_i2s_samples)
-
-# The original of this file can be found at : 
-# https://github.com/raspberrypi/pico-examples/blob/master/blink/CMakeLists.txt
-
-add_subdirectory(samples)

rpi/CMakeLists.txt

@@ -0,0 +1,49 @@
+#[[
+Copyright 2020 (c) 2020 Raspberry Pi (Trading) Ltd.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
+following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
+   disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
+   disclaimer in the documentation and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+]]
+
+# The first part of the CMakeLists.txt which download SDK automatically. 
+
+# The original of this file can be found at : 
+# https://github.com/raspberrypi/pico-sdk/blob/master/README.md
+
+cmake_minimum_required(VERSION 3.13)
+
+# initialize pico-sdk from GIT
+# (note this can come from environment, CMake cache etc)
+set(PICO_SDK_FETCH_FROM_GIT on)
+
+# pico_sdk_import.cmake is a single file copied from this SDK
+# note: this must happen before project()
+include(pico_sdk_import.cmake)
+
+# initialize the Raspberry Pi Pico SDK
+pico_sdk_init()
+
+# rest of your project
+project(pico_duplex_i2s_samples)
+
+# The original of this file can be found at : 
+# https://github.com/raspberrypi/pico-examples/blob/master/blink/CMakeLists.txt
+
+add_subdirectory(samples)