Newhaven Display Forum

Newhaven Products => TFTs => Topic started by: npn on May 06, 2014, 01:55:37 AM

Title: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: npn on May 06, 2014, 01:55:37 AM
Hello,

     I'm looking for a display 4.3 inch. I have chosen NHD-4.3-480272EF-ATXL#-CTP but my doubt is how to interface this with LPC2368?? does it has inbulit controller?? I am new to TFT displays so how to Program it?
Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: Michael_L on May 06, 2014, 12:02:52 PM
We sell controller boards that can be used with our displays.  For that 4.3" TFT, you can use the NHD-4.3-480272MF-20 Controller Board (link below):

http://www.newhavendisplay.com/nhd43480272mf20-controller-board-p-2657.html (http://www.newhavendisplay.com/nhd43480272mf20-controller-board-p-2657.html)

The datasheet can be downloaded by accessing that link.  We also have example code available for it here:

http://www.newhavendisplay.com/app_notes/TFT_43M.txt (http://www.newhavendisplay.com/app_notes/TFT_43M.txt)
Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: cuevas1208 on July 16, 2015, 03:17:49 PM
Iím very new to LCD interfacing to a micro-controller. I am using the Newhaven Display Intl NHD-4.3-480272EF-ATXL#-CTP on LPC2478-32 Developer's Kit. I am train the code similar to http://www.newhavendisplay.com/NHD_forum/index.php?topic=134.0 based on the IAR sample code but with these settings:
#define C_GLCD_REFRESH_FREQ     (50HZ)
#define C_GLCD_H_SIZE           480
#define C_GLCD_H_FRONT_PORCH    2
#define C_GLCD_H_PULSE          41
#define C_GLCD_H_BACK_PORCH     2
#define C_GLCD_V_SIZE           272
#define C_GLCD_V_FRONT_PORCH    2
#define C_GLCD_V_PULSE          10
#define C_GLCD_V_BACK_PORCH     2
I have not got my screen back light to turn on, what connections am I doing wrong? (
http://i61.tinypic.com/2ev445v.jpg )
http://www.newhavendisplay.com/specs/NHD-4.3-480272EF-ATXL-CTP.pdf
http://www.embeddedartists.com/products/kits/lpc2478_kit.php
Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: Paul_B on July 17, 2015, 11:45:17 AM
Hello!

Based on the wiring diagram you provided, it would appear that you do not have the displays LED-Anode (LED+) or LED-Cathode (LED-) connected to anything.

LED+ will need to be supplied 40mA @ 19.2V

LED- will need to be connected to GND

Hope this helps!
Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: cuevas1208 on July 17, 2015, 03:10:14 PM
(http://i59.tinypic.com/2dh5w6c.jpg)

I connected pin#1 to GND and pin#2 to  40mA @ 19.2V from a power supply, and I still do not see the Backlight turn on.
* Do I need to connect some type of resistor in series between pin#2 and the power supply?
* What are the minimum requirement(pins) for the Blacklight to turn on?  I do not have the 6 pins from the touch screen connected do they have to be connected?
Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: Paul_B on July 17, 2015, 04:17:36 PM
Hello,

You have swapped the pins, in your wiring diagram LED+ is connected to GND and LED- is connected to 40mA @ 19.2V.

LED+ will need to be supplied 40mA @ 19.2V

LED- will need to be connected to GND
Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: Paul_B on July 21, 2015, 11:11:32 AM
Hello,

No code / initialization sequence is required to turn on the displays backlight. Simply applying 40mA @ 19.2V to pin 2 and Gnd to pin 1 will turn on the backlight  :)

Please verify the operation of Pins 1 & 2 with a DMM.

Hope this helps!



Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: cuevas1208 on July 22, 2015, 07:54:22 AM
Thank you for your help, it works
Title: Re: NHD-4.3-480272EF-ATXL#-CTP how to interface this with LPC2368
Post by: Paul_B on July 22, 2015, 10:56:11 AM
Very nice, enjoy your new TFT!  ;)