startet canbus implementation

software/test_canbus/.gitignore

@@ -0,0 +1 @@
+build

software/test_canbus/.vscode/c_cpp_properties.json

@@ -0,0 +1,16 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ]
+        }
+    ],
+    "version": 4
+}

software/test_canbus/CMakeLists.txt

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+list(APPEND BOARD_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/..)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(hello_world)
+
+target_sources(app PRIVATE src/main.c)
+target_sources(app PRIVATE ../lib/canbus.c)
+target_include_directories(app PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/../lib
+)

software/test_canbus/boards/nucleo_f103rb.overlay

@@ -0,0 +1,9 @@
+&usart1 {
+	status = "okay";
+	current-speed = <9600>;
+	modbus0 {
+		compatible = "zephyr,modbus-serial";
+		status = "okay";
+		// de-gpios = <&arduino_header 15 GPIO_ACTIVE_LOW>;	/* D9 */
+	};
+};

software/test_canbus/prj.conf

@@ -6,8 +6,5 @@ CONFIG_UART_CONSOLE=y # Console on USART1
 #CONFIG_RTT_CONSOLE=y
 #CONFIG_USE_SEGGER_RTT=y
 
-CONFIG_UART_INTERRUPT_DRIVEN=y
-CONFIG_UART_LINE_CTRL=n
-
-CONFIG_MODBUS=y
-CONFIG_MODBUS_ROLE_CLIENT=y
+CONFIG_LOOPBACK_MODE=y
+CONFIG_LOG_CAN_LEVEL=4

software/test_canbus/src/main.c

@@ -0,0 +1,26 @@
+/* Testing MODBUS functionality
+   This code initializes a Modbus client, sets the zero point and the 2m point for water level,
+   and reads the water level in both meters and millimeters.
+   It uses the Zephyr RTOS and its Modbus library to communicate with a Modbus server.
+*/
+
+#include <zephyr/logging/log.h>
+#include <zephyr/kernel.h>
+#include <zephyr/drivers/gpio.h>
+
+#include "canbus.h"
+
+LOG_MODULE_REGISTER(main, CONFIG_LOG_DEFAULT_LEVEL);
+
+int main(void)
+{
+	int rc;
+	rc = canbus_init();
+	if (rc != 0)
+	{
+		LOG_ERR("Failed to initialize CAN bus: %d", rc);
+		return rc;
+	}
+	LOG_INF("CAN bus initialized successfully");
+	return 0;
+}