I installed LVGL but didn't have any success with it. The parallel displays are available from multiple vendors/manufacturers. Any suggestions as to a graphical tool (no cost) to use to create the button images and the progress bar and have them display on the screen? By using the parallel display it keeps me from being locked to the Nextion display. I would like to duplicate the functions that were created for the Nextion display. I have tested the parallel display by loading code into an Arduino to confirm it works. I also purchased a parallel 320 x 480 display as shown in photo two to experiment with. The messages control various relays and perform other operations. All of the buttons send valid USART messages to the STM32F446 controller. It took about 3 hours to write the code for the interface shown in photo one. Quote from: rcbuck on April 12, 2022, 02:05:57 am I purchased a Nextion 320 x 480 display. But they do not have a sample application for the STM32F4 with a 320 x 480 display. STM32CubeIDE has the TouchGFX plug in and it works with a smaller screen. If I can get the button images on the screen I can handle to touch screen code. It appears that LVGL is a work in progress that is basically unusable. When I tried to run a couple of the LVGL demos I get hundreds of errors about missing files. I installed Visual Studio which took over 30 minutes (ridiculous). I am running Windows and LVGL requires an older version of Visual Studio and SDL to run the simulator.
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