U8x8 - Fonts

The U8x8 font system is a highly optimized, "text-only" subset of the popular U8g2 graphics library designed specifically for monochrome OLED and LCD displays. While full graphics libraries require significant RAM to buffer pixel data, U8x8 operates by writing directly to the display's hardware "tiles"—fixed 8x8 pixel grids—making it the ideal choice for microcontrollers with extremely limited memory, such as the ATmega328. 🛠️ The Technical Architecture of U8x8

2. Initialize display in U8x8 mode

The U8x8 font format originated in the early days of computer graphics, when memory and processing power were scarce. The 8x8 pixel grid was chosen as a compromise between font size, readability, and memory usage. Over the years, U8x8 fonts have been widely used in various applications, including video games, calculators, and other embedded systems. u8x8 fonts

Kael drew two squares in the sand.

static const uint8_t my_custom_font[] = 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Space 0x00, 0x00, 0x5F, 0x00, 0x00, 0x00, 0x00, 0x00, // ! // ... and so on for 256 characters ; The U8x8 font system is a highly optimized,

: Useful for highlighting menu items by inverting the character colors. Creating and Editing Custom Fonts standard U8x8 font list doesn't meet your needs, you can build your own: Initialize display in U8x8 mode The U8x8 font

For developers needing specific aesthetics, the ecosystem is well-supported: u8x8reference · olikraus/u8g2 Wiki - GitHub

To get started, you’ll need to initialize the U8x8 constructor rather than the U8g2 one. Here is a bare-bones example for an I2C OLED: