Pull request project-chip#33: Clean template app

Merge in WMN_TOOLS/matter from clean_template_app to silabs Squashed commit of the following: commit bdb7afbaad193316e5f219ef214f16dabc4702f6 Author: Elfelsoufi-SiLabs <[email protected]> Date: Fri Aug 5 16:29:46 2022 -0400 👣 Add guide How To Create a Custom Application. commit 14e94216fe6da0ffdecf59d06cc8d50eba4719ac Author: Elfelsoufi-SiLabs <[email protected]> Date: Fri Aug 5 11:22:41 2022 -0400 👣 Update Template app README.md to include information about functioning of a Matter app. commit 3631c3a08d04e00c6cd123e137f7c826a31d87aa Author: Elfelsoufi-SiLabs <[email protected]> Date: Wed Aug 3 19:09:00 2022 -0400 ⛳ Remove endpoints from the app. commit 55cf4b2b89bb340fad1ff50becba5cdfd3434381 Author: Elfelsoufi-SiLabs <[email protected]> Date: Fri Jul 29 16:34:17 2022 -0400 ⚡ Make Build.gn point to sl_template and regenerate template zap files. commit 323767ab80125152b9e0f9e177e49e1714929c9e Author: Elfelsoufi-SiLabs <[email protected]> Date: Fri Jul 29 16:31:09 2022 -0400 ☎️ Improve ZclCallbacks file in template app.
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diff --git a/silabs_examples/template/efr32/BUILD.gn b/silabs_examples/template/efr32/BUILD.gn
@@ -176,7 +176,7 @@ efr32_executable("template_app") {
 
   deps = [
     ":sdk",
-    "${chip_root}/examples/lighting-app/lighting-common",
+    "${chip_root}/silabs_examples/template/template_DataModel_config",
     "${chip_root}/src/lib",
     "${chip_root}/src/setup_payload",
   ]

diff --git a/silabs_examples/template/efr32/HOW_TO_CREATE_A_CUSTOM_APP.md b/silabs_examples/template/efr32/HOW_TO_CREATE_A_CUSTOM_APP.md
@@ -0,0 +1,229 @@
+# How to Create an EFR32 Matter Application
+
+<hr>
+
+-   [How to Create an EFR32 Matter Application](#how-to-create-an-efr32-matter-application)
+    -   [Introduction](#introduction)
+    -   [Create your app](#create-your-app)
+        -   [Create a new directory](#create-a-new-directory)
+        -   [Modify the application](#modify-the-application)
+            -   [Using ZAP to configure clusters](#using-zap-to-configure-clusters)
+                -   [Create a Data Model](#create-a-data-model)
+                -   [Cluster Configuration and Generation](#cluster-configuration-and-generation)
+            -   [Modifying the GN Build files](#modifying-the-gn-build-files)
+            -   [Modifying the source code](#modifying-the-source-code)
+        -   [Running your app](#running-your-app)
+
+<hr>
+
+## Introduction
+
+This guide will walk you through the process of creating your own application,
+starting from the [template application][1].
+
+Please read the template application’s [README.md file](README.md) for a summary
+about the functioning of a Matter EFR32 application.
+
+## Create your app
+
+Follow the steps below to create a new application named **your_app**.
+
+### Create a new directory
+
+1. Copy the [template folder][1], paste it in the [silabs_examples][2]
+   directory. Rename the folder as **your_app**.
+
+### Modify the application
+
+Before modifying the source code, follow the steps below to make sure that
+**your_app** is a fully functional custom application.
+
+#### Using ZAP to configure clusters
+
+_Clusters_ determine which commands **your_app** can receive. To configure
+_clusters_ for your app, you need a data model. For more information about
+clusters, see [README.md](README.md).
+
+##### Create a Data Model
+
+Before we can modify the cluster configuration, we need to create a new data
+model configuration for **your_app**.
+
+If you followed step 1, in **your_app** folder, you should have two directories.
+One of them should have a name similar to “template_DataModel_config”. We will
+modify this folder to create a custom Data Model configuration named
+**your_data_model_config**.
+
+2. Rename the folder “template_DataModel_config” to
+   “**your_data_model_config**”.
+
+Inside **your_data_model_config**, you will find a file named “sl_template.zap”.
+This file contains your cluster configuration.
+
+3. Rename “sl_template.zap” to “**your_app.zap**”.
+
+Inside **your_data_model_config** you should also find a BUILD.gn file. This
+file needs to be modified as well, but we will come back to it later.
+
+When you feed “**your_app**.zap” to Zaptool, ZAP will translate the ".zap" file
+into a C implementation. This process is called _Generation_. We need to create
+a directory for **your_app** where Zap tool will output the C files. This
+directory needs to be located inside [zzz_generated][3].
+
+4. Naviguate to [zzz_generated][3]. Inside, create a new directory named
+   “**your_app**”. Inside the folder you just created, create another folder
+   named “zap-generated”.
+
+We want Zaptool to generate the C files in the directory you just created,
+namely: [zzz_generated][3]/**your_app**/zap-generated. To do so, go back to
+**your_data_model_config** and make the following modifications.
+
+5. Naviguate to the file “BUILD.gn” located in **your_data_model_config**.
+   Inside, change the following lines of code:
+
+```gn
+	# Change this line of code
+	chip_data_model("sl_template") {
+	# to this:
+	chip_data_model("your_data_model_config") {
+```
+
+```gn
+	# Change the following line of code
+	zap_file = "sl_template.zap"
+	# to:
+	zap_file = "your_app.zap"
+```
+
+```gn
+	# Finally, modify the following line
+	zap_pregenerated_dir = "${chip_root}/zzz_generated/sl_template/zap-generated"
+	# to become:
+	zap_pregenerated_dir = "${chip_root}/zzz_generated/your_app/zap-generated"
+```
+
+Now, we have our own configurable data model. We can now modify the cluster
+configuration and _Generate_ with ZAP.
+
+##### Cluster Configuration and Generation
+
+Follow the steps below to modify the cluster configuration stored in
+“**your_app**.zap”. To do that, you need to run ZAP. See [this guide][4] to
+learn how to run zap (it can take some time). Once you have Zap up and running,
+proceed with the steps below:
+
+6. Open a terminal. Navigate to the [root directory][5] of your Matter
+   repository.
+
+7. Run ZapTool. Enter this bash command in your terminal:
+
+    ```bash
+    # While in the root directory, run this command:
+    ./scripts/tools/zap/run_zaptool.sh
+    ```
+
+An application running on “Electron” should appear on your screen after a
+moment.
+
+8. Now open your file.zap in the ZapTool. For Mac, follow these steps
+
+    1. Go to the App Menus (top bar).
+    2. Select `Electron > Open File...`
+    3. Modify the cluster configuration using the UI of Zaptool.
+    4. When finished modifying the file, select `Electron > Save`
+    5. Close Zaptool.
+
+9. To _Generate_ the corresponding C files, execute the following command:
+
+    ```bash
+    # While in the root directory, run this command:
+    ./scripts/tools/zap/generate.py silabs_examples/your_app/your_data_model_config/your_app.zap -o zzz_generated/your_app/zap-generated
+    # The first argument is the path to the "generate script". It should not be changed.
+    # The second argument is the path to **your_app**.zap. Zap will use it to *Generate*.
+    # The third argument "-o" should not be modified.
+    # The last argument is the directory where the C files will be *Generated*.
+    ```
+
+If everything worked as expected, you should now have a file named
+"**your_app**.matter" inside the folder **your_data_model_config**.
+
+Finally, there is a file which ZAP does not generate. It is called
+"af-gen-event.h" and it is necessary to run a Matter application.
+
+10. Navigate to one of the zzz-generated output directory (one example is the
+    [lighting-app output directory]). Copy the "af-gen-event.h" file and paste
+    it inside "zzz-generated/**your_app**/zap-generated". This step needs to be
+    done only once for each new app.
+
+Now, you have successfully modified and generated a Matter cluster
+configuration.
+
+**Important** The process is not finished! You must update the GN files to point
+to **your_data_model_config**. Read the section [Modifying the GN Build
+files][6] to learn more.
+
+#### Modifying the GN Build files
+
+You need to add the **your_data_model_config** to the build configuration so
+that the compiler will compile the C files you generated in the previous steps.
+
+To do so, you need to modify [BUILD.gn](BUILD.gn) which is the main build file
+of your application.
+
+11. Naviguate to the main [BUILD.gn](BUILD.gn) file, perform this modification:
+
+    ```gn
+    # Find the "efr32_executable" section of the file. Inside it you will find a sub-section called
+    # deps = [
+    # Here, there is list of dependencies listed.
+    # Remove any DataModel dependencies from this section. They will look like this:
+    # "${chip_root}/silabs_examples/template/template_DataModel_config",
+    # or like this:
+    # "${chip_root}/examples/lighting-app/lighting-common",
+    # Remove them all, we want our app to use your_data_model_config only.
+    # Now, add your_data_model_config as a dependency.
+    # After you are done, "deps" should look something like this:
+    deps = [
+        ":sdk",
+        "${chip_root}/silabs_examples/your_app/your_data_model_config",
+        "${chip_root}/src/lib",
+        "${chip_root}/src/setup_payload",
+    ]
+    ```
+
+Now, you have a configurable custom Matter application. You can proceed to
+modifying the source code of **your_app**.
+
+#### Modifying the source code
+
+As mentioned in the [README](README.md) of this app, Matter commands are
+received in the function [MatterPostAttributeChangeCallback()][7]. You can
+modify this function to forward Matter commands to a custom function of your
+choice and handle them there. Refer to [Color Lighting][8] to see how this can
+be done.
+
+Note: If you add .cpp files to **your_app**, modify [BUILD.gn](BUILD.gn) to take
+account of it. To do so, navigate to the section "efr32_executable" in the file,
+locate the "sources" subsection and add your new "file.cpp" there.
+
+Note: Both in the source files and in the [BUILD.gn](BUILD.gn), you might have
+to rename certain variables. Simply renaming any instance of "sl_template" or
+"template" to "**your_app**" should be enough.
+
+### Running your app
+
+Color Light app's [README][9] contains useful information about building,
+flashing and running a Matter EFR32 app. A more complete guide can be found in
+Lighting-app's [README](../../../examples/lighting-app/efr32/README.md).
+
+###### Last modified August 5th, 2022.
+
+[1]: ../../template/
+[2]: ../../../silabs_examples/
+[3]: ../../../zzz_generated/
+[4]: ../../../third_party/zap/repo/README.md
+[5]: ../../../
+[6]: #Modifying-the-GN-Build-files
+[7]: src/ZclCallbacks.cpp
+[8]: ../../sl-newLight/efr32/src/
+[9]: ../../sl-newLight/efr32/README.md