Add Getting Started

Getting-Started.md

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+# J1939 CAN Logger
+
+## Overview
+
+This project is a **J1939 CAN bus data logger** built around an STM32 microcontroller. It listens to two CAN buses (500 kbit/s and 250 kbit/s), logs all CAN messages to a microSD card, and indicates activity with LEDs. The firmware uses **CMSIS‑RTOS v2** (FreeRTOS) to manage multiple tasks: CAN reception, logging, and heartbeat blinking.
+
+## Main Features
+
+- Two independent CAN interfaces (silent mode – does not disturb the bus)
+- Accept‑all filtering (logs every CAN frame)
+- J1939‑ready (29‑bit extended identifiers)
+- LED indicators:
+  - Blinks on each received CAN message (per bus)
+  - Heartbeat LED to show system alive
+- RTOS task separation for reliable, non‑blocking operation
+- Data logging via serial interface
+
+## Planned Future Features
+- Data logging to FAT32 microSD card (CSV format)
+
+## Quick Start (summary)
+
+1. Build the firmware with STM32CubeIDE or Makefile.
+2. Connect the board to a J1939 network via CAN transceivers.
+3. Insert a formatted microSD card.
+4. Power on – the logger starts recording immediately.
+5. Remove the SD card and view logs on a PC.
+
+or:
+3. Power on – the logger starts recording immediately.
+4. Connect a listening device on serial interface and read logs.
+
+See the other wiki pages for hardware setup, software architecture, and detailed usage.