display

Connecting 7" touchscreen display to Raspberry Pi 4B

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1.0 Introduction

Raspberry Pi 4B has a Display Serial Interface (DSI) port for connecting a Raspberry Pi touchscreen display using a ribbon cable. In this post we will look at the process of connecting the Raspberry Pi 7" touchscreen display with the Raspberry Pi 4B single board computer.… Read more

Getting started with Raspberry Pi

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1.0 Raspberry Pi

Raspberry Pi 4 Model B

Raspberry Pi is a popular single board computer developed by the Raspberry Pi Foundation in the U.K. Raspberry Pi 4 Model B (Pi4B) was released in June 2019. The main components of Pi4B are:

  • The system-on-chip, (Soc).
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Error

Gtk-WARNING **: cannot open display:

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While running a GTK+ based C program under Cygwin, the following runtime error is observed,

Gtk-WARNING **: cannot open display:

SOLUTION

  1. Make sure that Cygwin/XServer is installed and is running. If it is not installed, download the relevant packages from Cygwin.
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