Nokia Display doesn't work

Testing/Troubleshooting
1

I connected a Nokia Display pcd5844 to my Core module.

all connectoins are tested and correct. Voltage is 3,1 V but I used a 10uF  capacitor  instead of the 2,2 uF.  Then I changed the LCD Type to 7  using  change_id_v1_4 and loaded the pcd5844 example app.  But now the display shows nothing. Does anyone now, what could be wrong?

2

Hi stefaN,

at the beginning an important info: only the pcd5844 example app contains the driver, this means that you have to copy the app_lcd.inc file into other applications when you want to use them together with the display.

The example application also sets the LCD type to 7, so a wrong configuraton cannot be the problem.

How did you test the connections?

Best Regards, Thorsten.

3

thanx for this information, so I can be shure that it’s no software related problem.

I tested the Voltage at the display and I checked, if there are

220Ohm between the pin of the Display and the corresponding pin of the PIC.

Perhaps I  have the wrong display?

I bought a Display for a Nokia 3310, I don’t think there are

differences.

So I’m going to check all connections, voltages, resistors…again.

I would be verry pretty if I get this display working, because it’s not only cheap but also extrem flat, small, nice…  

4

Now I’m shure, that I’ve the wrong display. I tested it with anothher core modul and it didn’t work either.  Furthermore the additional four pins are missing.  And now the glas is broken anyway. So I’ll try to get a complete 3310 instead of only the display. Or can somebody tell me, where to order a compatible display in Germany?

5

Furthermore the additional four pins are missing

What do you mean with that? Which additional (compared with?) pins?

Does it look like this one?

http://www.myplace.nu/mp3/images/nokia_lcd_large.jpg

Greets, Roger

6

i mean the four unused pins which you can see on the wiring diagramm at the  MBHP_LCD page.  

Yes, it look’s like the one at  myplace.nu but instead of the tape there is a metal frame around it.

Tomorrow i’ll get another used NOKIA phone. Perhaps it has the right display.

7

http://serdisplib.sourceforge.net/ser/pcd8544.html

… interresting info about the display types.

Greets, Roger

8

http://serdisplib.sourceforge.net/ser/pcd8544.html

… interresting info about the display types.

Greets, Roger

Excellent! Respect!!

9

Thanks - I’ve added the link to the MBHP_LCD page

Best Regards, Thorsten.

10

Thanks - I’ve added the link to the MBHP_LCD page

Best Regards, Thorsten.

… thanks.

Thorsten, could you also change the driver “title”? - I think it’s realy called “PCD8544” and not “PCD5844”… this leaded to confusion in earlier posts.

Greets, Roger

11

Hi Roger,

thank you for turing this out (one year after the release :wink:

everything but the photo is renamed now (I’ve to create a new one)

Best Regards, Thorsten.