WS2812B Color Space Converter for STM32 Blue Pill

Real-time RGB, HSV, and HSL color control for WS2812B LED strips — running natively on STM32F103C8T6 (Blue Pill) with zero external libraries and integer-only math.

Perfect for embedded projects where floating-point is unavailable or inefficient.

💡 Why HSL? HSV gives vibrant colors, while HSL produces soft pastels — ideal for ambient lighting, mood indicators, and artistic displays.

✨ Features

• ✅ Full RGB ↔ HSV ↔ HSL conversion in pure C (no float or math.h)
• ✅ Per-pixel or global color control in any color space
• ✅ Hardware-accelerated via PWM + DMA (non-blocking, timing-perfect)
• ✅ Built-in animated effects:
  • Rainbow (RGB/HSV/HSL)
  • Smooth breathe
  • Fire flicker
  • Theater chase
  • Pastel wave (HSL-only)
• ✅ No dependency on FastLED, Adafruit NeoPixel, or Arduino
• ✅ Ready for real-time applications (e.g., sensor-driven color feedback)

🛠️ Hardware Requirements

🔌 Pinout:

• WS2812B DATA IN → PA6 (TIM3_CH1)
• Shared GND between Blue Pill and LED strip

💻 Software Requirements

• IDE: STM32CubeIDE (v1.15+)
• HAL: STM32CubeF1 (v1.8.6+)
• Clock: 72 MHz (HSE + PLL)
• Timer: TIM3 in PWM mode
• DMA: Channel for TIM3_CH1

📦 No external libraries — everything is self-contained!

📂 Project Structure