samples: bindesc: Add hello_bindesc sample

Add the hello_bindesc sample which shows the basic usage of
binary descriptors.

Signed-off-by: Yonatan Schachter <yonatan.schachter@gmail.com>

samples/subsys/bindesc/bindesc.rst

@@ -0,0 +1,10 @@
+.. _bindesc_samples:
+
+Binary Descriptor Samples
+#########################
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*

samples/subsys/bindesc/hello_bindesc/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(hello_bindesc)
+
+target_sources(app PRIVATE src/main.c)

samples/subsys/bindesc/hello_bindesc/README.rst

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+.. _hello_bindesc-sample:
+
+hello_bindesc Sample Application
+################################
+
+Overview
+********
+
+A simple sample of binary descriptor definition and usage.
+
+Building and Running
+********************
+
+Follow these steps to build the `hello_bindesc` sample application:
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/subsys/bindesc/hello_bindesc
+   :board: <board to use>
+   :goals: build
+   :compact:
+
+To see all binary descriptors, run:
+
+.. code-block:: bash
+
+   west bindesc dump build/zephyr/zephyr.bin

samples/subsys/bindesc/hello_bindesc/VERSION

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+VERSION_MAJOR = 1
+VERSION_MINOR = 0
+PATCHLEVEL = 0
+VERSION_TWEAK = 0
+EXTRAVERSION =

samples/subsys/bindesc/hello_bindesc/prj.conf

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+# Enable binary descriptors
+CONFIG_BINDESC=y
+
+# Enable definition of binary descriptors
+CONFIG_BINDESC_DEFINE=y
+
+# Enable default build time binary descriptors
+CONFIG_BINDESC_DEFINE_BUILD_TIME=y
+CONFIG_BINDESC_BUILD_DATE_TIME_STRING=y
+
+# Enable default version binary descriptors
+CONFIG_BINDESC_DEFINE_VERSION=y
+CONFIG_BINDESC_KERNEL_VERSION_STRING=y
+CONFIG_BINDESC_KERNEL_VERSION_MAJOR=y
+
+CONFIG_BINDESC_APP_VERSION_STRING=y
+
+# Enable default host info binary descriptors
+CONFIG_BINDESC_DEFINE_HOST_INFO=y
+CONFIG_BINDESC_C_COMPILER_NAME=y
+CONFIG_BINDESC_C_COMPILER_VERSION=y

samples/subsys/bindesc/hello_bindesc/sample.yaml

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+sample:
+  name: Hello Bindesc
+tests:
+  sample.bindesc:
+    tags: bindesc
+    filter: CONFIG_ARCH_SUPPORTS_ROM_START
+    build_only: true
+    integration_platforms:
+      - native_posix

samples/subsys/bindesc/hello_bindesc/src/main.c

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+/*
+ * Copyright (c) 2023 Yonatan Schachter
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/bindesc.h>
+
+BINDESC_STR_DEFINE(my_string, 1, "Hello world!");
+BINDESC_UINT_DEFINE(my_int, 2, 5);
+BINDESC_BYTES_DEFINE(my_bytes, 3, ({1, 2, 3, 4}));
+
+int main(void)
+{
+	size_t i;
+
+	/* Builtin descriptors */
+	printk("Zephyr version: %s\n", BINDESC_GET_STR(kernel_version_string));
+	printk("App version: %s\n", BINDESC_GET_STR(app_version_string));
+	printk("Build time: %s\n", BINDESC_GET_STR(build_date_time_string));
+	printk("Compiler: %s %s\n", BINDESC_GET_STR(c_compiler_name),
+		BINDESC_GET_STR(c_compiler_version));
+
+	/* Custom descriptors */
+	printk("my_string: %s\n", BINDESC_GET_STR(my_string));
+	printk("my_int: %d\n", BINDESC_GET_UINT(my_int));
+	printk("my_bytes: ");
+	for (i = 0; i < BINDESC_GET_SIZE(my_bytes); i++) {
+		printk("%02x ", BINDESC_GET_BYTES(my_bytes)[i]);
+	}
+	printk("\n");
+
+	return 0;
+}