LVGL v8 Official Example

Introduction

This example is used to test LVGL V8 APIs using officially provided examples. You can replace the lv_example_scroll_1() function in src/main.c (simulator in simulator/applications/application.c) to test other APIs. Other API functions can be referenced in the src/examples/lv_examples.h header file.

Project Compilation and Download:

Board projects in the project directory can be compiled for specific boards by specifying the board parameter:

  • To compile a project that can run on HDK 563, execute scons –board=eh-lb563 to generate the project

  • Download can be performed through download.bat in the build directory. For example, to flash the 563 project generated in the previous step, execute .\build_eh-lb563\download.bat to download via J-Link

  • Special note: For SF32LB52x/SF32LB56x series, an additional uart_download.bat will be generated. You can execute this script and enter the download UART port number to perform the download Simulator project is in the simulator directory:

  • Compile using scons. The SiFli-SDK/msvc_setup.bat file needs to be modified accordingly to match the local MSVC configuration

  • You can also use scons –target=vs2017 to generate the MSVC project project.vcxproj and compile using Visual Studio.

Note

If using VS2022 or other versions besides VS2017, you will be prompted to upgrade the MSVC SDK when loading the project. After upgrading, it can be used normally.

Supplementary Instructions - How to Use sjpg

Source Code Path: SiFli-SDK\example\multimedia\lvgl\lvgl_v8_examples

Supported Platforms

This example can run on the following development boards:

  • sf32lb52-lchspi-ulp

  • sf32lb52-lcd_n16r8

Overview

  • After inserting an SD card to complete file system mounting, read and display .sjpg and .jpg format images from it

Hardware Requirements

  • Huangshan development board or 52x series development board

  • A USB data cable with data transfer capability

  • A TF card and a TF card reader

Example Usage

Compilation and Flashing

The default display image in the demo code is: small_image.sjpg

Switch to the example project directory and run the scons command to compile:

scons --board=sf32lb52-lchspi-ulp -j8

Execute the flashing command:

build_sf32lb52-lchspi-ulp_hcpu\uart_download.bat

Select the port as prompted to download:

please input the serial port num:5

Example Output Result Display:

  • After inserting the SD card, mount the file system and read/display images from the file system. The log containing mount fs on flash to root success indicates successful file system mounting

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  • You can input ‘ls’ to view image files in the file system

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Example Effect Display

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Example Configuration Process

  • By default, SPI is not enabled for TF file system mounting. If needed, configure as follows:

  • First, use a TF card reader to write image files to the TF card, then insert the TF card into the board

  • Configure through menuconfig as follows:

menuconfig --board=sf32lb52-lchspi-ulp

  • Enable SPI bus

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  • Mount SD\TF device on SPI bus

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  • Configure file path

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  • Enable LVGL file system interface, configure drive letter, and enable decoder

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Troubleshooting

  • Abnormal log alt text If the above situation occurs, the TF card may be loose, unable to communicate properly, or not inserted