.. _requirements:

============ Requirements

Basically, every modern controller which is able to drive a display is suitable to run LVGL. The minimal requirements are:

• 16, 32 or 64 bit microcontroller or processor

• 16 MHz clock speed is recommended

• Flash/ROM: > 64 kB for the very essential components (> 180 kB is recommended)

• RAM:

  • Static RAM usage: ~2 kB depending on the used features and Widget types
  • stack: > 2kB (> 8 kB recommended)
  • Dynamic data (heap): > 2 KB (> 48 kB is recommended if using many GUI Widgets). Set by :c:macro:LV_MEM_SIZE in lv_conf.h.
  • Display buffer: > "Horizontal resolution" pixels (> 10 X "Horizontal resolution" is recommended)
  • One frame buffer in the MCU or in an external display controller

• C99 or newer compiler

• Basic C (or C++) knowledge:

  • pointers <https://www.tutorialspoint.com/cprogramming/c_pointers.htm>__.
  • structs <https://www.tutorialspoint.com/cprogramming/c_structures.htm>__.
  • callbacks <https://www.geeksforgeeks.org/c/callbacks-in-c/>__.

.. note:: Memory usage may vary depending on architecture, compiler and build options.