From 38fd3a6aac48e1e94a8a86580e2a806209376179 Mon Sep 17 00:00:00 2001
From: Eduard Iten <eduard@iten.pro>
Date: Thu, 3 Jul 2025 09:15:11 +0200
Subject: [PATCH] Add hello_world Zephyr application for stm32g431_core

---
 software/CMakeLists.txt                  | 1 +
 software/apps/hello_world/CMakeLists.txt | 6 ++++++
 software/apps/hello_world/prj.conf       | 4 ++++
 software/apps/hello_world/src/main.c     | 9 +++++++++
 4 files changed, 20 insertions(+)
 create mode 100644 software/apps/hello_world/CMakeLists.txt
 create mode 100644 software/apps/hello_world/prj.conf
 create mode 100644 software/apps/hello_world/src/main.c

diff --git a/software/CMakeLists.txt b/software/CMakeLists.txt
index 04f0e5d..ccd0e02 100644
--- a/software/CMakeLists.txt
+++ b/software/CMakeLists.txt
@@ -5,3 +5,4 @@ project(software)
 add_subdirectory(modules/modbus_server)
 add_subdirectory(modules/valve)
 add_subdirectory(modules/fwu)
+add_subdirectory(apps/hello_world)
diff --git a/software/apps/hello_world/CMakeLists.txt b/software/apps/hello_world/CMakeLists.txt
new file mode 100644
index 0000000..8728b9c
--- /dev/null
+++ b/software/apps/hello_world/CMakeLists.txt
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.20)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(hello_world)
+
+target_sources(app PRIVATE src/main.c)
diff --git a/software/apps/hello_world/prj.conf b/software/apps/hello_world/prj.conf
new file mode 100644
index 0000000..ef1ed77
--- /dev/null
+++ b/software/apps/hello_world/prj.conf
@@ -0,0 +1,4 @@
+CONFIG_BOARD="stm32g431_core"
+CONFIG_CONSOLE=y
+CONFIG_LOG=y
+CONFIG_UART_CONSOLE=y
diff --git a/software/apps/hello_world/src/main.c b/software/apps/hello_world/src/main.c
new file mode 100644
index 0000000..dbec9a8
--- /dev/null
+++ b/software/apps/hello_world/src/main.c
@@ -0,0 +1,9 @@
+#include <zephyr/kernel.h>
+#include <zephyr/sys/printk.h>
+
+int main(void)
+{
+	printk("Hello World! %s\n", CONFIG_BOARD);
+	return 0;
+}
+