KgOfHedgehogs
Posts: 3
Joined: Tue Aug 30, 2016 12:17 pm

40pin 320x200px TFT LCD connection

Tue Aug 30, 2016 1:37 pm

Hello!
I found a car DVR (global navigation gn220), which has a small display. I want to connect this display to my rpi 2 b v1.1.
This is a 2.5 inch 320x200px TFT LCD with 40 pin connector.
On first and second pic related there is this display connected to some chip (H185D_LCD_V1.0), which it uses as an adapter to 17 or 20 (I can't understand) pin connector to connect to the main board.
On the third and fourth pic related there is main board. I highlighted with red ellipse the display connector on the board. MCU signed as "H76525S-1216".
Sorry for the dirt on the board, i can't clean out it.

So the question is there a some not very hard way to connect this display to rpi through DSI port?

And also I googled and find some results about 40 pin display connection to rpi, but they all about LCD with touch screen connection, and my display as I know from working with this DVR has no touch screen feature. First 14 pins (maybe less or more) of 40 pin connector are not connected to the H185D_LCD_V1.0 chip. Is it possible, what this display has a not connected touch screen or 40 pin connector is just standard for displays like this, which allow touch screen connection?

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aBUGSworstnightmare
Posts: 1580
Joined: Tue Jun 30, 2015 1:35 pm

Re: 40pin 320x200px TFT LCD connection

Tue Aug 30, 2016 5:11 pm

1. There is no standard for TFT displays
2. Where is the display? Can just see some PCBs
3. None of the Chips you mentioned look like a TFT controller, so - most likely - this display uses a SPI or 8bit MCU interface

KgOfHedgehogs
Posts: 3
Joined: Tue Aug 30, 2016 12:17 pm

Re: 40pin 320x200px TFT LCD connection

Tue Aug 30, 2016 5:23 pm

aBUGSworstnightmare wrote:2. Where is the display? Can just see some PCBs
Here it is. I thought that it doesn't have anything interesting.
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aBUGSworstnightmare
Posts: 1580
Joined: Tue Jun 30, 2015 1:35 pm

Re: 40pin 320x200px TFT LCD connection

Wed Aug 31, 2016 9:43 am

Sorry, but no LCD part number on the module. So you can either start reverse engineering the interface or get a display which is 'known working' on the RPi.

KgOfHedgehogs
Posts: 3
Joined: Tue Aug 30, 2016 12:17 pm

Re: 40pin 320x200px TFT LCD connection

Wed Aug 31, 2016 1:18 pm

aBUGSworstnightmare wrote:So you can either start reverse engineering the interface or get a display which is 'known working' on the RPi.
Okay. Thanks

tinylcd
Posts: 206
Joined: Sat Oct 26, 2013 4:07 am

Re: 40pin 320x200px TFT LCD connection

Thu Sep 01, 2016 4:25 am

hello

below is one of the known working displays on Rpi

http://www.neosecsolutions.com//product ... 8&cPath=20

regards
tinylcd

ZacharyH
Posts: 1
Joined: Mon Oct 23, 2017 10:26 pm

Re: 40pin 320x200px TFT LCD connection

Mon Oct 23, 2017 10:40 pm

Where on earth did you get the tft to dsi converter? I've been looking everywhere for one of those

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