Balong OLED emulator and custom menu

This project contains both an emulator for the LCD/OLED display of some Huawei Balong-based portable routers and a library to add a custom menu to the OLED display of Huawei E5785 portable LTE router.

The custom menu libraries work by hijacking certain library calls in the "oled" executable file with LD_PRELOAD.

The emulator provides those functions for the library to hook, and displays the rendered framebuffer using SDL2.

Both the emulator and the custom menu support models with a 128x128 16-bit BGR565 LCD displays as well as models with 128x64 1-bit b/w monochrome OLED displays.

The custom menu library uses Clay with a custom renderer to render the menus. Currently only a "hello world" menu is implemented, but it will be extended in the future.

Project structure

• emulator/ - The Balong OLED/LCD emulator using SDL2.
• custom-menu/ - The custom menu library.
• include/ - Common headers
• generate_bitmap_font.py - Script that converts a given TTF font to a bitmap font to embed in the custom menu library.