Quelltext der Seite WSAL18079 – 1.54inch LCD Module/en

__NOINDEX__
'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
The 1.54inch LCD module (240×240) uses an ST7789VW driver and a SPI interface; it is intended for Raspberry Pi, STM32, Arduino UNO and VisionFive2.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL18079 WSAL18079 – 240×240, General 1.54inch LCD Display Module, IPS, 65K RGB]

== Technical overview ==
* Resolution: 240(H) × 240(V) pixels on an IPS panel.
* Display size: 27.72 mm × 27.72 mm; module dimensions 50 mm × 35 mm; pixel pitch 0.1155 mm per pixel.
* Interface: 4-wire SPI with MOSI, SCLK, CS, DC, RST, BL plus VCC/GND.
* Driver ST7789VW supports RGB444, RGB565 and RGB666; the demos use RGB565.
* Supply voltage: 3.3 V or 5 V depending on target system; supply and logic levels must be consistent.
* Raspberry Pi connection via a PH2.0 8-pin cable to GPIO pins 19, 23, 24, 22, 13, 12.
* STM32F103RBT6 demo uses PA7/PA5/PB6/PA8/PA9/PC7 for DIN/CLK/CS/DC/RST/BL.
* Arduino UNO uses D11/D13/D10/D7/D8/D9 for the same signals.
* VisionFive2 uses board pins 19/23/24/22/13/12 according to the pin mapping table.

'''Commands and examples – verify before use:''' 
<syntaxhighlight lang="text">
sudo raspi-config
sudo reboot
sudo make clean && sudo make -j 8
sudo ./main 1.54
sudo python3 1inch54_LCD_test.py
python3 1inch54_LCD_test.py
</syntaxhighlight>

== Notes and version constraints ==
* Voltage levels: VCC must match the logic level (3.3 V or 5 V), otherwise the module may not function properly.
* Version-sensitive notes: On Bookworm only lgpio is available; bcm2835/wiringPi cannot be installed there. Bullseye requires 'apt' instead of 'apt-get'.
* The C/Python demos cover multiple screen sizes; for this module use parameter 1.54.
* SPI timing (CPHA=0, CPOL=0) from the datasheet must be observed when porting.
* Exact pinout can vary by board variant; verify the actual hardware before wiring.

== Source and revision record ==
* [https://www.waveshare.com/wiki/1.54inch_LCD_Module 1.54inch LCD Module - Waveshare Wiki]
* Source revision: 105201
* Captured: 2026-09-01T03:01:33+00:00
* SHA-256: <code>f5e9d25876da166a624430673e96bb50a9d4ec159982ab0a9d32cb7d07c10f8b</code>