https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL13587_%E2%80%93_4inch_TFT_Touch_Shield%2FenWSAL13587 – 4inch TFT Touch Shield/en - Versionsgeschichte2026-10-23T22:25:20ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL13587_%E2%80%93_4inch_TFT_Touch_Shield/en&diff=1820&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:37:24Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
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'''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.<br />
<br />
== Summary ==<br />
Technical overview of the Waveshare 4inch TFT touch shield: ILI9486 display controller, XPT2046 touch chip, SPI connection and demo programs for Arduino and STM32.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL13587 WSAL13587 – 4inch Touch LCD Shield for Arduino]<br />
<br />
== Technical overview ==<br />
* The module uses the ILI9486 LCD controller and is initialized over the SPI interface; the initialization routines are located in LCD_Driver.cpp.<br />
* Touch control uses the XPT2046 chip; related functions are in LCD_Touch.cpp.<br />
* For Arduinos with an ICSP header (e.g., UNO), leave the SPI config switch on the ICSP side; without ICSP, set it to SCLK/D13, MISO/D12, MOSI/D11.<br />
* The demo projects cover three folders: LCD_Show (shapes and patterns), LCD_ShowBMP (BMP image display via SD card) and LCD_Touch (drawing board).<br />
* To show a BMP image, copy the files into the root directory of a FAT-formatted SD card; images must be 480×320 pixels at 24-bit color depth in BMP format.<br />
* The bundled font library provides five sizes: font8 (5×8), font12 (7×12), font16 (11×16), font20 (14×20) and font24 (17×24).<br />
* The vendor also ships the Image2Lcd tool for converting images into array data, plus Zimo221 as a font-extraction utility.<br />
* On the STM32 side, the demo was tested on an XNUCLEO-F103RB (STM32F103RBT6); demos use the HAL library and call GUI_Show, LCD_Show_bmp and TP_DrawBoard sequentially in the main program.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
System_Init();<br />
LCD_Init(Lcd_ScanDir, 200);<br />
SD_Init();<br />
LCD_ShowBMP();<br />
TP_Init(Lcd_ScanDir);<br />
TP_GetAdFac();<br />
TP_Dialog();<br />
TP_DrawBoard();<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* The source does not provide exact voltage, current or temperature values; electrical specifications should be taken from the ILI9486 / XPT2046 datasheets.<br />
* Compatibility with microcontrollers other than UNO / XNUCLEO-F103RB is not documented and must be checked per pin mapping.<br />
* Demo version and required Arduino IDE version are not stated; updates may change behavior.<br />
* The SD card must be placed in the root directory – subfolders are not supported according to the source; verify before testing.<br />
* No warranty, certification or safety information is present in the source; these points require human confirmation from the supplier.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/4inch_TFT_Touch_Shield 4inch TFT Touch Shield - Waveshare Wiki]<br />
* Source revision: 100979<br />
* Captured: 2026-08-30T03:54:18+00:00<br />
* SHA-256: <code>7a0263b66963316909e0c4891e96488ce5b47046ed0de867daea3426bb879ebe</code></div>JWTechPublisher