Introduction

  • Raspberry Pi Official 7" lcd screen display will be working . The 7" touch screen monitor for Raspberry Pi gives users the ability to create all-in-one, integrated projects such as tablets, infotainment systems and embedded projects. 

  • The 800x480 display connects via an adapter board which handles power and signal conversion. 

  •  We can plug keyboard and mouse to the raspberrypi for the userinteraction. 

  • Screen resolution 800 x 480 pixels Connects to the Raspberry Pi board using a ribbon cable connected to the DSI port. 

  • Adapter board is used to power the display and convert the parallel signals from the display to the serial (DSI) port on the Raspberry Pi. 

  • The display works with all existing Raspberry Pi models with RDK images.

Hardware requirement

  •    Raspberry Pi 3 Model B+
  •    Raspberry Pi Touchscreen LCD Display (7-inch)
  •    MicroSDHC Class 10 98 MB/s (Sandisk ultra)
  •    Power adapter for raspberrypi
  •    Normal headset  for connecting to raspberrypi 3.5mm jack


    Note: Raspberry Pi Touchscreen LCD Display (7-inch) can be ordered from https://www.amazon.in/Raspberry-Pi-Touchscreen-Display-7-inch/dp/B0153R2A9   

Hardware setup

  •  This LCD will connects to the Raspberry Pi board using a ribbon cable connected to the DSI port as shown below. 
  •  LCD display will be powered using connected wires as shown below.  From 7-inch lcd power 5v pin (pin1) needs to be connected to raspberrypi 5v (Pin2) and Gnd pin(pin5) needs to be connected to raspberrypi gnd pin (pin6). 

  •  Connections to GPIO pins and DSI port.

  • Headset connection to RPI 3.5mm jack for audio

           

Building procedure

  •     repo init -u https://code.rdkcentral.com/r/manifests -b rdk-next -m rdkv-nosrc.xml
  •     repo sync --no-tags
  •     source meta-cmf-raspberrypi/setup-environment
  •     select meta-cmf-raspberrypi/conf/machine/raspberrypirdkhybrefapp-seven-inch-lcd.conf
  •     bitbake  rdk-generic-hybrid-refapp-image

Verification

  •     After boot-up we can verify that application(Ex:appmanager) will be fitted into 7-inch display resolution as shown below:

                      

  •     We can verify inside refapp image also.
         

DEBUG Logs

  • For confirming resolution user can see the logs by watching journalctl on particular service.

          Example:
           journalctl -x -u appmanager

  • Also user can launch runAppmanager directly for observing console logs.
    systemctl stop appmanager
    sh /lib/rdk/runAppmanager

Test cases

  •     On 7-inch display we can verify all features like 
  1.       westeros_test(compositor test application)
  2.       Browser applications like rdkbrowser2
  3.       playback through gstreamer plugins
  4.       rmfApp playback
  5.       aamp playback
  6.       spark applications, appmanager and refapp etc.
  •    Attached system test plan will covers all these test cases.

Reference


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