From 8255b2a672be805d42f405f62b105a3fe44802d6 Mon Sep 17 00:00:00 2001
From: Eduard Iten <eduard@iten.pro>
Date: Mon, 7 Jul 2025 13:49:03 +0200
Subject: [PATCH] Add firmware_node app - Step 1: Shell with reset command

- Create new Zephyr app for firmware management
- Target: weact_stm32g431_core board
- Features: Shell interface with custom reset command
- Tested on Zephyr 4.1.99
- Flash usage: 55,400 bytes (42.27% of 128KB)
- RAM usage: 12,864 bytes (39.26% of 32KB)
- Black Magic Probe flash runner support
---
 software/apps/firmware_node/CMakeLists.txt    |  8 +++++
 software/apps/firmware_node/README.md         | 34 +++++++++++++++++++
 .../boards/weact_stm32g431_core.conf          |  2 ++
 software/apps/firmware_node/prj.conf          | 10 ++++++
 software/apps/firmware_node/src/main.c        | 28 +++++++++++++++
 software/apps/firmware_node/sysbuild.cmake    | 12 +++++++
 6 files changed, 94 insertions(+)
 create mode 100644 software/apps/firmware_node/CMakeLists.txt
 create mode 100644 software/apps/firmware_node/README.md
 create mode 100644 software/apps/firmware_node/boards/weact_stm32g431_core.conf
 create mode 100644 software/apps/firmware_node/prj.conf
 create mode 100644 software/apps/firmware_node/src/main.c
 create mode 100644 software/apps/firmware_node/sysbuild.cmake

diff --git a/software/apps/firmware_node/CMakeLists.txt b/software/apps/firmware_node/CMakeLists.txt
new file mode 100644
index 0000000..bf7491b
--- /dev/null
+++ b/software/apps/firmware_node/CMakeLists.txt
@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.20)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(firmware_node LANGUAGES C)
+zephyr_include_directories(../../include)
+add_subdirectory(../../lib lib)
+target_sources(app PRIVATE src/main.c)
diff --git a/software/apps/firmware_node/README.md b/software/apps/firmware_node/README.md
new file mode 100644
index 0000000..acc6bb2
--- /dev/null
+++ b/software/apps/firmware_node/README.md
@@ -0,0 +1,34 @@
+# Firmware Node Application
+
+This Zephyr application provides firmware management capabilities for the irrigation system.
+
+**Tested on Zephyr 4.1.99**
+
+## Features
+
+### Step 1: Shell with Reset Command
+- Shell interface with custom "reset" command
+- Warm reboot functionality
+
+### Planned Features
+- MCUboot support with partition manager
+- Firmware version display
+- MCUmgr support for OTA updates
+
+## Building
+
+```bash
+west build -p auto -b weact_stm32g431_core apps/firmware_node -- -DBOARD_FLASH_RUNNER=blackmagicprobe
+```
+
+## Flashing
+
+```bash
+west flash
+```
+
+## Usage
+
+Connect to the device via serial console and use the shell:
+- `reset` - Reboot the system
+- `help` - Show available commands
diff --git a/software/apps/firmware_node/boards/weact_stm32g431_core.conf b/software/apps/firmware_node/boards/weact_stm32g431_core.conf
new file mode 100644
index 0000000..790634b
--- /dev/null
+++ b/software/apps/firmware_node/boards/weact_stm32g431_core.conf
@@ -0,0 +1,2 @@
+# Board specific configuration for weact_stm32g431_core
+# This file can be used for board-specific overrides if needed
diff --git a/software/apps/firmware_node/prj.conf b/software/apps/firmware_node/prj.conf
new file mode 100644
index 0000000..7609528
--- /dev/null
+++ b/software/apps/firmware_node/prj.conf
@@ -0,0 +1,10 @@
+# Enable Console and printk for logging
+CONFIG_CONSOLE=y
+CONFIG_LOG=y
+
+# Enable Shell
+CONFIG_SHELL=y
+CONFIG_REBOOT=y
+
+# Enable the reset command
+CONFIG_KERNEL_SHELL=y
diff --git a/software/apps/firmware_node/src/main.c b/software/apps/firmware_node/src/main.c
new file mode 100644
index 0000000..9750811
--- /dev/null
+++ b/software/apps/firmware_node/src/main.c
@@ -0,0 +1,28 @@
+#include <zephyr/kernel.h>
+#include <zephyr/shell/shell.h>
+#include <zephyr/sys/reboot.h>
+#include <zephyr/logging/log.h>
+
+LOG_MODULE_REGISTER(firmware_node, LOG_LEVEL_DBG);
+
+static int cmd_reset(const struct shell *shell, size_t argc, char **argv)
+{
+    ARG_UNUSED(argc);
+    ARG_UNUSED(argv);
+    
+    shell_print(shell, "Rebooting system...");
+    k_msleep(100); // Give time for message to be sent
+    sys_reboot(SYS_REBOOT_WARM);
+    
+    return 0;
+}
+
+SHELL_CMD_REGISTER(reset, NULL, "Reset the system", cmd_reset);
+
+int main(void)
+{
+    LOG_INF("Firmware Node starting up");
+    LOG_INF("Shell with reset command available");
+    
+    return 0;
+}
diff --git a/software/apps/firmware_node/sysbuild.cmake b/software/apps/firmware_node/sysbuild.cmake
new file mode 100644
index 0000000..53e3311
--- /dev/null
+++ b/software/apps/firmware_node/sysbuild.cmake
@@ -0,0 +1,12 @@
+# Enable MCUboot
+set(SB_CONFIG_BOOTLOADER_MCUBOOT y)
+
+# MCUboot configuration
+set(SB_CONFIG_MCUBOOT_BOOTLOADER_MODE_OVERWRITE_ONLY y)
+set(SB_CONFIG_MCUBOOT_SIGNATURE_KEY_FILE "bootloader/mcuboot/root-rsa-2048.pem")
+set(SB_CONFIG_MCUBOOT_GENERATE_UNSIGNED_IMAGE y)
+set(SB_CONFIG_MCUBOOT_GENERATE_CONFIRMED_IMAGE y)
+
+# Enable USB CDC ACM for MCUboot console
+set(SB_CONFIG_MCUBOOT_USB_SUPPORT y)
+set(SB_CONFIG_MCUBOOT_SERIAL y)