STM32 Bare Metal Graphics | Complete Framebuffer Implementation for OLED

This video walks through how to build a graphics library for an SSD1306 OLED display using bare-metal STM32 register programming over I2C. We create a framebuffer, draw pixels, lines, rectangles, circles, and text, then transfer the framebuffer to the display without using HAL. Perfect for embedded systems developers wanting to understand low-level graphics rendering and display memory organization. 🧠 Bare-Metal STM32 Series: SSD1306 OLED Graphics Library ⚠️ Problem: ❌ OLED can display data but can't draw graphics ❌ Unsure how pixels map into SSD1306 memory ❌ No framebuffer for updating the display ❌ Confused about drawing lines, circles, and text ❌ HAL graphics libraries hide how everything works ✅ Solution: ✔️ Build a framebuffer from scratch ✔️ Draw individual pixels in RAM ✔️ Implement line drawing using Bresenham's algorithm ✔️ Draw rectangles and circles ✔️ Render 5x7 bitmap fonts ✔️ Print text to the OLED ✔️ Update the SSD1306 display from the framebuffer 🛠️ What You'll Learn ⚙️ How the SSD1306 framebuffer is organized 📘 Mapping pixels into display memory 🖊️ Drawing pixels, lines, rectangles, and circles 🔤 Rendering 5x7 bitmap fonts 📺 Printing strings to the OLED display 🧠 Updating the display efficiently over I2C 🛠️ Parts Used 🟢 STM32 Nucleo-L432: https://amzn.to/4rqbhJZ (affiliate link) 🟢 SSD1306 OLED Display Module: https://amzn.to/48YXmEe (affiliate link) 🟢 Breadboard & Jumper Wires 🔗 Links & Resources 📁 GitHub Repository – SSD1306 Graphics Library ➡️ https://github.com/equipembedded/STM3... #STM32 #EmbeddedSystems #BareMetal #SSD1306 #OLED #I2C #Graphics #microcontrollerprogramming #microcontroller ⚠️ Safety & Liability Disclaimer This video is for educational purposes only. Direct register manipulation may cause unexpected peripheral behavior if misconfigured. Always verify wiring, pull-up resistors, voltage compatibility, and timing configuration before connecting external peripherals. By attempting to replicate anything shown in this video, you assume full responsibility and risk. Equip Embedded assumes no liability for damage, injury, data loss, or other issues resulting from the use or misuse of the information presented. Code shown may contain bugs or errors. Do not use directly in production or safety-critical systems.