Arm-2D is not a GPU but an abstraction layer for 2D GPUs dedicated to Microcontrollers. It supports all Cortex-M processors ranging from Cortex-M0 to the latest Cortex-M85.
Arm-2D is an open-source project on Github. For more, please refer to: https://github.com/ARM-software/Arm-2D.
How to Use¶
In general, you can set the macro
lv_conf.h to enable Arm-2D acceleration for LVGL.
If you are using CMSIS-Pack to deploy the LVGL. You don't have to define the macro
LV_USE_GPU_ARM2D manually, instead, please select the component
GPU Arm-2D in the RTE dialog. This step will define the macro for us.
As mentioned before, Arm-2D is an abstraction layer for 2D GPU; hence if there is no accelerator or dedicated instruction set (such as Helium or ACI) available for Arm-2D, it provides negligible performance boost for LVGL (sometimes worse) for regular Cortex-M processors.
We highly recommend you enable Arm-2D acceleration for LVGL when: