Problem with TFT HY28A

Other Hardware Displays
1

Hello everybody! I'm actually working on a project for the University and I have to program a LCD to show some data. Unfortunately a friend who bought the tft could only find the Hy28A which I know is not current.
I have been trying really hard to make it work but the only thing I got was to turn it on, I can't find a way to make it show text or pictures.

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I don't know if Im making a mistake with the connections to the arduino or with the library, but I'll let you know what I've done so far:

First of all, I tried connecting the SPI pins to the arduino, to be more specific: MOSI, MISO, SCK, CS and Reset. But even though I sent an specific library for the Hy28A it didn''t show anything.
After that I connected the pins for a nonSPI interface, the CS, WR, RS, RD and Reset, and I also connected the BL_CTRL to adjust the brightness(just in case it was too bright to see the text). but the same happened, and it didn't work. I also used the same connection, but adding pins from 0 to 7 but also didn[t work. I'll add a picture of the tft so you can see which pins I'm talking about.

After all that I though that maybe it was not the connection but the library the one that was not right, so I I looked for an specific library for the ILI9320 which the screen works with, and found out one that worked with the ILI9325, the connections I used were this ones:

DB0 to DB7 > Arduino D0 to D7 respectively
RD > 3.3 V
RSET > A2
CS > A3
RW > A4
RS > A5
backlight 5V > 5V
backlight GND > GND

And for the code, I sed example 50.1 from this page:

http://tronixstuff.com/2013/04/26/tutorial-arduino-and-ili9325-colour-tft-lcd-modules/

The problem was that in the folder of the types of screens included in the library, there wasn´t one for the ILI9320, so I downloaded one from another web and added it to the folder. The problem was that because I don´t know much about C, I couldn´t get the initl.h or the setxy.h archives in the UTFT.h library.

I don't know right now what to do since I can't tell if its the connection or the lbrary the problem, for now I just want the screen to show some text just to start, after that I plan to add some pictures of a menu to make my project.

I really need your help with this since I've tried a lot but couldn't make it. Thanks in advance and I really hope you all can help me.

Thanks again and have a nice day.

2

The display requires 3.3V logic. e.g. a Due or Zero or perhaps an 8Mhz Pro Mini.
If you want to use a Uno or Mega, you need level shifters on every signal.

It will work just fine via SPI. In fact this will be a lot easier than parallel because it is less wires (and less level shifters).

If you can confirm your wiring, I can show you how to use it.

David.

3

Thank you so much for your help, so in this case its better to work with a DUE to be able to connect the pins correctly without using the level shifters...

In any case I´ll only need the pins SCK, MOSI, CS, DC and Reset right? the wiring to the arduino was:

Cs- pin 10
Reset- pin 8
MOSI- pin 11
SCLK- pin 13

As you can see in the screen it has no specific DC pin, so when wiring it, I used RS.

Can you help me with it please?