akashmittal
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Interfacing 2.4 inch touch screen LCD with Raspberry Pi

Mon Jan 23, 2017 1:21 pm

I want to interface a 2.4 inch capacitive LCD touch screen with the Raspberry Pi using DSI connection, just like the 7 inch LCD (https://www.raspberrypi.org/products/ra ... h-display/). Since only 7 inch LCD is available for raspberry pi I was planning to use a standalone LCD (https://www.alibaba.com/product-detail/ ... 0.html?s=p) with the Raspberry pi. So is it somehow possible for me to make this work? Or, can I use the adapter board which is available with the 7 inch LCD, to work with the 2.4 inch display?

klricks
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Re: Interfacing 2.4 inch touch screen LCD with Raspberry Pi

Mon Jan 23, 2017 6:15 pm

akashmittal wrote:I want to interface a 2.4 inch capacitive LCD touch screen with the Raspberry Pi using DSI connection, just like the 7 inch LCD (https://www.raspberrypi.org/products/ra ... h-display/). Since only 7 inch LCD is available for raspberry pi I was planning to use a standalone LCD (https://www.alibaba.com/product-detail/ ... 0.html?s=p) with the Raspberry pi. So is it somehow possible for me to make this work? Or, can I use the adapter board which is available with the 7 inch LCD, to work with the 2.4 inch display?
Only the official RPF 7" screen can be used in the RPi DISPLAY (DSI) port.
You will have to use an adapter board to convert to some other format such as SPI, HDMI or Composite.
Unless specified otherwise my response is based on the latest and fully updated Raspbian Buster w/ Desktop OS.

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CarlRJ
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Re: Interfacing 2.4 inch touch screen LCD with Raspberry Pi

Tue Jan 24, 2017 12:29 am

As klrick said, the ONLY display that will plug into the DSI connector on the Pi (and work) is the Official 7" touchscreen. This is because such a display needs extensive support in the GPU, and that's the only one they've done the setup work for. Other displays need to connect via HDMI, composite (yuck), or SPI. Both Asafruit (with their PiTFT/PiTFT+ line) and Waveshare have displays in the 2.2"-3.5" range that mount on top of the Pi and connect via SPI. This requires some driver support, but the drivers for some of the displays are built in to Raspbian now. There are others out there too, but Adafruit and Waveshare are a good place to start looking.

tinylcd
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Joined: Sat Oct 26, 2013 4:07 am

Re: Interfacing 2.4 inch touch screen LCD with Raspberry Pi

Tue Jan 24, 2017 4:32 am

Hello Akash Mitall

in case you are from india than you can get 3.5 inch display tested on raspberry pi locally from below online stores also

http://www.tinylcd.com/tiny149/product. ... product=37

regards
tinylcd

akashmittal
Posts: 3
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Re: Interfacing 2.4 inch touch screen LCD with Raspberry Pi

Tue Jan 24, 2017 6:44 am

supra wrote:Here is link for adapter board. Scroll down to bottom
http://en.startek-lcd.com/te_product_a_ ... 7628.chtml
Thank you for your response.
Do you mean to say that it can work? Will this adapter board work same as that of the 7 inch display? Thanks again

akashmittal
Posts: 3
Joined: Mon Jan 23, 2017 12:50 pm

Re: Interfacing 2.4 inch touch screen LCD with Raspberry Pi

Tue Jan 24, 2017 6:53 am

CarlRJ wrote:As klrick said, the ONLY display that will plug into the DSI connector on the Pi (and work) is the Official 7" touchscreen. This is because such a display needs extensive support in the GPU, and that's the only one they've done the setup work for. Other displays need to connect via HDMI, composite (yuck), or SPI. Both Asafruit (with their PiTFT/PiTFT+ line) and Waveshare have displays in the 2.2"-3.5" range that mount on top of the Pi and connect via SPI. This requires some driver support, but the drivers for some of the displays are built in to Raspbian now. There are others out there too, but Adafruit and Waveshare are a good place to start looking.
Thank you for yor response!
So there is no way yet to configure any other screen using the dsi connectors? What if i use the same adapter board as provided with the 7 inch display, just replacing the lcd with any other? Actually i was planning to build gui using embedded wizard software http://www.embedded-wizard.de/raspberry-pi.html. So if that can't be done then what other best alternatives ar there for building good gui on raspberry pi? Thank you again

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CarlRJ
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Re: Interfacing 2.4 inch touch screen LCD with Raspberry Pi

Tue Jan 24, 2017 8:01 am

akashmittal wrote:So there is no way yet to configure any other screen using the DSI connectors?
None that I know of. It might be worth checking in the "Interfacing (DSI, CSI, I2C, etc.)" subforum to see if there's any recent developments.
akashmittal wrote:What if i use the same adapter board as provided with the 7 inch display, just replacing the lcd with any other?
Aside from that being unlikely to work, the only way to get that adapter board is to buy one of the Official 7" Displays.
akashmittal wrote:Actually i was planning to build gui using embedded wizard software http://www.embedded-wizard.de/raspberry-pi.html.
I've not seen nor heard of that one before, interesting.
akashmittal wrote:So if that can't be done then what other best alternatives ar there for building good gui on raspberry pi?
I'm using PyGame on Adafruit's PiTFT 2.8" Capacitive Touchscreen displays (though there's currently some serious voodoo needed to get the touchscreen input working), and Kivy on the Official 7" touchscreen display. Those both seem to be the popular choices (at least for working in Python; I believe some also use Qt and other frameworks). They're also free, where Embedded Wizard looks to cost many thousands of Euros, if I'm reading right.

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