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2026-09-05T22:34:24Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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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.

== Summary ==
The 3.2-inch display connects via the Raspberry Pi's GPIO pins and uses SPI plus a resistive touch panel. It is compatible with all common Raspberry Pi generations.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/9201 9201 – 3.2inch Resistive Touch Display (B) for Raspberry Pi, 320×240, SPI]
* [https://shop.jw-tech.eu/p/WSAL9201 WSAL9201 – 3.2inch Resistive Touch Display (B) for Raspberry Pi, 320×240, SPI]

== Technical overview ==
* Resolution: 320 × 240 pixels
* Interface: SPI over the 40-pin GPIO header; the display has 26 pins
* Touch: Resistive film with an IRQ input (TP_IRQ), active low when pressed
* Connection: Direct plug-in on the Raspberry Pi GPIO header
* Operating voltage: 3.3 V and 5 V via the corresponding pin positions
* Reset signal (RST): reset triggered by low level
* Chip select: LCD_CS selects the LCD (low); TP_CS selects the touch panel (low)
* Data transfer: LCD_SI/TP_SI for data, LCD_SCK/TP_SCK as clock, TP_SCL for touch data
* Compatibility: Works with any Raspberry Pi model since the header plugs in directly
* Driver: FBCP software driver supports configurable resolution and dual-display operation

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo apt-get install unzip -y
sudo apt-get install cmake -y
wget https://files.waveshare.com/wiki/common/Waveshare32b.zip
unzip ./Waveshare32b.zip
sudo cp waveshare32b.dtbo /boot/overlays/
sudo nano /boot/firmware/config.txt
dtparam=spi=on
dtoverlay=waveshare32b
hdmi_force_hotplug=1
max_usb_current=1
hdmi_group=2
hdmi_mode=87
hdmi_cvt 640 480 60 6 0 0 0
hdmi_drive=2
display_rotate=0
sudo nano ~/.bash_profile
export FRAMEBUFFER=/dev/fb1
startx 2> /tmp/xorg_errors
sudo nano /usr/share/X11/xorg.conf.d/99-fbturbo.~
Section "Device"
</syntaxhighlight>

== Notes and version constraints ==
* The calibration values in the example (3795 171 168 3913) are device-specific and must be re-measured on site.
* The config.txt configuration contains conflicting lines (hdmi_mode=1 and hdmi_mode=87); it must be confirmed which line is valid.
* The driver file name “Waveshare32b.zip” may vary by system version; download the latest version if issues occur.
* Automatic login requires the username to be “pi”; it will not work with other users.
* After applying the configurations, system restart takes longer and SSH needs a moment to become available.
* When powering the Pi through a PC USB port, insufficient power may prevent proper startup; recommended supply: 5 V / 2.5 A.

== Source and revision record ==
* [https://www.waveshare.com/wiki/3.2inch_RPi_LCD_(B) 3.2inch RPi LCD (B) - Waveshare Wiki]
* Source revision: 111143
* Captured: 2026-08-29T09:26:59+00:00
* SHA-256: <code>af6b9ef52a5571d12a51afad4fb0d178a674923c1f2204d0117e2fb9fc305915</code>

9201 – 3.2inch RPi LCD (B)/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex