Nokia 6270 LCD and Arduino Uno

[Василий Пупки]

Hi, I'm trying to get to work nokia 6270 display with Arduino Uno (Atmega328p). I use manual for 6300 and Arduino Uno:
http://andybrown.me.uk/wk/2012/07/28/interfacing-the-nokia-6300-qvga-tft-to-the-standard-arduino/

I connected  the display in accordance with the scheme:

| Function	| LCD pin |	Uno pin |
D0	6	0
D1	18	1
D2	8	2
D3	17	3
D4	9	4
D5	15	5
D6	10	6
D7	14	7
WR(WRX)	5	8
RS(DCX)	19	9
CS(CSX)	11	GND
VIO(VDDI)	3	+3.3
VDD	22	+3.3
RESET(RESX)	12	+3.3

Pinout of connector I found here:
http://andybrown.me.uk/wk/2012/06/05/nokia-lcd-for-arduino-mega-1/


Then I installed library for Arduino Mega from here (for use with Arduino Uno):
http://andybrown.me.uk/wk/files/xmemtft-3.0.2.zip

I opened example project "xmemtft-->AllPenels-->Line".
I replaced the code:

Code Select Expand

//typedef Nokia6300_Landscape_262K TftPanel;
typedef Nokia6300_Landscape_262K_Gpio TftPanel;
to compile for Arduino Uno.

When Arduino start, TX Led lights on Arduino board.

LCD does not respond.

In the wiring diagram LED_1 is connected to LED_2+, and the backlight power is supplied to LED_1+ and LED_2-. My backlights work if I connect power to LED_1 and LED_1+ or LED_2 and LED_2+.

May be someone already worked with this display and knows how to make him work?
may be initializing doing differently?

[Andy Brown]

Hi, my project is for the Nokia 6300 LCD. Have you obtained the service manual for the 6270 and verified that the pinout is identical to the 6300?

Regards,
- Andy

[Василий Пупки]

May be I'm stupid, but I can't find display connector on nokia 6270 schematics.
In schematics I found that the signals on the display go through the filter, then to board to board connector and then to RAPGSM. Where Display connector??
https://dl.dropboxusercontent.com/u/25895838/6270_schematics.pdf
I looked schematics other phones, including 6300, they have a schematic of the display connector.

[Andy Brown]

The signals are there on "X2400" a 40-pin board-to-board connector. This is a slide phone. It's different to all the others I've looked at because it has two main boards that will be connected together by the board-to-board connectors and some flex cable. The usual 24-pin JST connector that they use is not present in the schematic you've posted.

[Василий Пупки]

Yes, 24-pin JST connector is not present in the schematic, but on phone board I see him, and display has him.
I called display to search ground, and the ground is on the same pins as the connector for 6300. So I decided that the connectors are compatible, I may be wrong.
I will buy a suitable display and continue to develop devices with it.
Thanks for the help!