LVGL-Eve

This repository is an extension of EveApps, designed to provide LVGL support for reference purposes.

For more information about LVGL, visit LVGL.io. The original LVGL source code can be downloaded from GitHub.
The current LVGL version used is V9.0.0.

This repository has been modified to support EVE chips and has been tested with various examples, including the "widget demo," "benchmark demo," and "music demo" on a Raspberry Pico RP2040 with a BT816 chip.

Users should have prior experience with LVGL.

Dependency

This repository can't work alone, please download EveApps from https://github.com/Bridgetek/EveApps.
The folder "common" of EveApps repo is required.

Build instructions

1. Download EveApps.
2. Download LVGL-Eve (this repo) and copy the Demo_lvgl folder to EveApps/
3. Change lvgl configuration in lv_conf depends on your project, such as enable log, enable demos.
4. Change HSIZE in Demo_lvgl/eve_lvgl to your LCD's height for display buffer. (optional, need further optimize)
5. Add the example or demo which needed to run in Demo_lvgl/eve_lvgl. Demo need to be enabled in step 3.

EVE_CoCmd_dlStart(s_pHalContext);
//lv_example_get_started_1();
lv_demo_widgets(); //enable the widget demo
//lv_demo_benchmark();

Raspberry Pi Pico

Requires the Pico toolchain https://github.com/ndabas/pico-setup-windows to be installed.

Pico-SDK version 1.3.0 is required

The following steps will build for Raspberry Pi Pico.

1. Install cmake 3.19.x, python, Visual Studio 2019 community (must select C++), GNU Arm Embedded Toolchain for window.
2. Launch the Developer Command Prompt for VS

set PICO_SDK_PATH=[path to pico-sdk]
set PICO_TOOLCHAIN_PATH=[path to GNU Arm Embedded Toolchain\\10 2020-q4-major\\bin]
cd EveApps
mkdir build
cd build
cmake -G "NMake Makefiles" -DEVE_APPS_PLATFORM=EVE_PLATFORM_RP2040 -DEVE_APPS_GRAPHICS=[EVE graphics] ..
nmake Demo_lvgl

# [EVE graphics] can be EVE or module name, such as BT817, BT815, VM800B35A_BK ...

Example:

$ cmake.exe -G "NMake Makefiles" -DEVE_APPS_PLATFORM=EVE_PLATFORM_RP2040 -DEVE_APPS_GRAPHICS=EVE_GRAPHICS_BT816 -DEVE_APPS_DISPLAY=EVE_DISPLAY_WXGA ..
$ nmake Demo_lvgl

Display resolution is set via EVE_APPS_DISPLAY, example: cmake -G "NMake Makefiles" -DEVE_APPS_DISPLAY=EVE_DISPLAY_WXGA By default, WVGA is set

EVE graphics is set via EVE_APPS_GRAPHICS, example: cmake -G "NMake Makefiles" -DEVE_APPS_GRAPHICS=EVE_GRAPHICS_BT815 By default, MULTI is set

Connections

RP2040	EVE	UART	SD
GP0 (TX)		RX (debug)
GP1 (RX)		TX (optional)
GP2 (SPI0 SCK)	SCK
GP3 (SPI0 MOSI)	MOSI
GP4 (SPI0 MISO)	MISO
GP5 (GPIO)	CS
GP6 (GPIO)	INT
GP7 (GPIO)	PWD
5V	5V
GND	GND

Emulator, FT4222 and MPSSE

TBD

FT9XX (FT93X and FT90X)

TBD

Demo reference

benchmark

widgets

Limitation

At present, LVGL-Eve supports only fundamental functions, implying that not all necessary LVGL functions are available. For specific information regarding the LVGL examples supported in LVGL-Eve, please consult the documentation located at docs/LVGL_examples_supported_test_v1.0.pdf.

Unsupported cases:

1. Rotation is solely applicable to images and does not extend to other objects like buttons or images with an outline.
2. The functionality of the canvas is not available.

For cases with partial support, the following issues may be addressed in a future release:

1. In the current version, shadows appear to function only for a single object. If multiple objects are present, the shadows do not display correctly.
2. Scroll bars are observed more frequently in EVE's settings, prompting the need for further investigation.
3. There exists a layout problem wherein certain objects extend beyond the outer box boundaries.
4. The lines separating two lines of text are not visible.

To avoid underrun issues, it is necessary to reduce the complexity of demos due to the limitations of the display list.

Others

This repository has taken following as a reference

https://github.com/juanjqh/lvgl_eve_gpu_test-main

Version

This version is v1.0.0-alpha

Release log

v1.0.0-alpha

• Initial version