LVGL ported to STM32MP135F-DK

Overview

The STM32MP series of processors are MPUs with MMUs capable of running Linux. The STM32MP135F-DK is a devkit for the 1 GHz Cortex-A7 STM32MP135F MPU. It has a display and lots of high-level IO such as four USB ports and dual ethernet ports. The external SDRAM chip on the board is 512 MB.

Buy

You can purchase a STM32MP135F-DK from https://www.st.com/en/evaluation-tools/stm32mp135f-dk.html.

Benchmark

Software rendering using the double-buffered direct LTDC driver.

Name	Avg. CPU	Avg. FPS	Avg. time	render time	flush time
Empty screen	50%	54	9	1	8
Moving wallpaper	48%	56	7	1	6
Single rectangle	36%	59	5	0	5
Multiple rectangles	63%	56	9	0	9
Multiple RGB images	45%	57	7	0	7
Multiple ARGB images	54%	54	9	1	8
Rotated ARGB images	42%	53	8	2	6
Multiple labels	64%	53	12	1	11
Screen sized text	63%	60	9	6	3
Multiple arcs	43%	59	6	0	6
Containers	19%	53	8	1	7
Containers with overlay	63%	60	10	4	6
Containers with opa	24%	53	7	1	6
Containers with opa_layer	26%	50	11	4	7
Containers with scrolling	27%	60	3	3	0
Widgets demo	61%	49	8	3	5
All scenes avg.	45%	55	7	1	6

Specification

CPU and Memory

• CPU: ARM Cortex-A7
• RAM: 168 KB internal SRAM, 512 MB external SDRAM
• Flash: Micro SD Card

Display and Touch

• Resolution: 480x272
• Display Size: 4.3"
• Interface: RGB
• Color Depth: 16-bit
• Technology: LCD
• DPI: 128 px/inch
• Touch Pad: Capacitive

Connectivity

• 4x USB
• 2x ethernet
• Camera module
• WiFi
• Bluetooth
• USB Type-C

Getting started

Hardware setup

• You will need two USB Type-C cables. Only one needs to be data capable.
• Install a Micro SD Card in the slot. Only a very small capacity is needed as the binary is under 2 MB in size.

Software setup

• Install STM32CubeIDE. It can be downloaded from here.
• Ensure Python is available on your system.

Run the project

1. Clone this repo and the LVGL submodule.

   git clone --recursive https://github.com/lvgl/lv_port_stm32mp135f_disco_bm.git

2. Open the project with STM32CubeIDE.
3. Build the project by clicking the hammer icon.
4. While powered-off, set the four switches on the board to the "OPEN" position.
5. Connect first the USB C port labeled CN7 and then the USB C port labeled CN12 (aka PWR_IN).
6. In a terminal, change the directory to Binary and run Program_lv_port_stm32mp135_bm.sh (.bat on Windows).

   cd Binary
   ./Program_lv_port_stm32mp135_bm.sh

   You will be prompted to choose a "layout" to flash.

   Flashing the device 000080183031510A30333432
   1) FlashLayout_lv_port_stm32mp135_deleteall.tsv
   2) FlashLayout_lv_port_stm32mp135_bm.tsv
   Which layout do you want to flash ?
   

   Enter 1 and press enter. Wait for it to finish.
7. Press the black RESET button, B5.
8. Repeat step 6 but choose 2 this time.
9. Unplug both USBs.
10. Set the switches to 1:up, 2:down(OPEN), 3:up, 4:down(OPEN).
11. Connect the CN12 (aka PWR_IN) USB and the LVGL app should run.

Debugging

You can launch debugging in STM32CubeIDE by clicking the "bug" icon.

Contribution and Support

If you find any issues with the development board feel free to open an Issue in this repository. For LVGL related issues (features, bugs, etc) please use the main lvgl repository.

If you found a bug and found a solution too please send a Pull request. If you are new to Pull requests refer to Our Guide to learn the basics.