Any success with Newhaven Display LCDs?

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szefski
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2009/08/11 11:21:40 (permalink)
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Any success with Newhaven Display LCDs?

I have just ordered a Newhaven Display LCD
(Model number NHD-C24064WO-ATFH#-3V3 - you can find it here: http://www.newhavendisplay.com/index.php?main_page=product_info&products_id=1246)
and I am a bit confused as to the purpose of the two data cables. I want to be able to control this with the Explorer 16 board however I am not sure where to start.
Will I have to write a driver for this LCD? Also, are the two ribbon cables controlling each half of the display? In this case, what would I have to add to the driver to accomplish this?

Any success (or even horror) stories are welcome. Thank you.
#1

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    bosco
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    RE: Any success with Newhaven Display LCDs? 2009/08/11 12:46:58 (permalink)
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    THe purpose of the two connectors is in the data sheet.
     
    it uses a ST7565S controller.
     
    yes, you will probably have to write a driver.
    #2
    szefski
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    RE: Any success with Newhaven Display LCDs? 2009/08/12 08:44:26 (permalink)
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    The reason for the two connectors is not clear for me from reading and re-reading the datasheet.
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    bosco
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    RE: Any success with Newhaven Display LCDs? 2009/08/12 08:57:17 (permalink)
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    one is the master, the other is used as a slave.  You only want to use the master.
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    j0k3r
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    RE: Any success with Newhaven Display LCDs? 2009/08/12 10:19:53 (permalink)
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    Hi, you have to use the two connectors, the lcd is based on dual controllers, 2 ST7565S with 65x132 pixels (i think).

    Use the CS´s pins to select the controller you want to use on the moment.
    Think that you have 2 display´s with 128x64 side by side, using the same bus, using the CS´s pins to selecting.


    Cumps....




    #5
    szefski
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    RE: Any success with Newhaven Display LCDs? 2009/08/13 11:25:19 (permalink)
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    My co-workers and myself are torn between the two possibilities.

    Either way (whether it is master/slave or independent sides) if I just use the master connector, I should be seeing something, right?
    I'm sending initialization commands to it and I'm not seeing anything.
    #6
    frankcf1
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    RE: Any success with Newhaven Display LCDs? 2009/08/13 15:20:56 (permalink)
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    Did you try the ST7565 sample code at: http://www.newhavendisplay.com/app_notes/NHD-C12864.txt
     
     
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    szefski
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    RE: Any success with Newhaven Display LCDs? 2009/08/14 06:32:05 (permalink)
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    I actually copied that code and translated it to C and now I have strange flashing bars on my LCD.
    But hey, at least it's something!

    The communication protocol isn't as difficult as the schematic is to hook it up.
    In the datasheet, it specifies connecting capacitors from pins on my connector,
    to pins that don't exist. An example of this is I have to connect a capacitor from Vout to Vss2(which is nonexistent).
    or connecting a capacitor to C4+/- or C5+/- and neither exist.

    The LCD datasheet is also poorly translated chinese, however I found the display driver datasheet which is much easier to read.

    I found it here: ST7565S


    #8
    frankcf1
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    RE: Any success with Newhaven Display LCDs? 2009/08/14 08:47:35 (permalink)
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    Did you look at the schematic on the right side of page 28. I used that for another Newhaven display.
     
    The capacitors supply the display voltage.
    #9
    szefski
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    RE: Any success with Newhaven Display LCDs? 2009/08/14 11:41:43 (permalink)
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    I connected capacitors in that way, and just sent initialization commands and this is what I get:
    If each driver is a half of the screen, then why is this bar going over the mid-point of the screen?
    (I only have the 'master' cable plugged in).
    Also, if I connect the second cable, I don't get this bar.

    I can send the 'Display normal/reverse' command I get exactly that, black lines on a white background.

    post edited by szefski - 2009/08/14 11:47:28

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    #10
    frankcf1
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    RE: Any success with Newhaven Display LCDs? 2009/08/14 16:04:15 (permalink)
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    Try asking Newhaven. I found they respond within two days or less to my questions.
    #11
    szefski
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    RE: Any success with Newhaven Display LCDs? 2009/08/17 14:08:32 (permalink)
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    I sent an e-mail to Newhaven on Friday and I haven't received a reply yet.

    Today I tried connecting the second driver in different ways and I finally stumbled upon this.
    The two bars are displayed no matter what commands I send (display all points, invert all, display write).
    Whats interesting is the bar that was displayed before is no longer on.

    I'm sure I'm doing something fundamental very very wrong, I just wish there was more information on this so I could correct my mistake.

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    #12
    szefski
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    RE: Any success with Newhaven Display LCDs? 2009/08/27 07:31:01 (permalink)
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    Does anyone have any idea what may be wrong?
    #13
    maryp
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    Re:Any success with Newhaven Display LCDs? 2010/09/24 13:31:00 (permalink)
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    hey,
    could you get this newhaven display with st7565 display to work properly?
    i'd like to try and use this display for a project and could use some help.
    thanks.
     
    #14
    lesh11
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    Re:Any success with Newhaven Display LCDs? 2011/01/31 22:18:38 (permalink)
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    I don't know if you resolved your issues.  I am trying to use the same display with out much luck (or response from NewHaven).
    According to the ST7565S, only the master power supply works.  This seems to indicate that the Vout and V5 pins need to be connected together.  Also, the contrast circuit wont work for me.  If I attach a resistor to Vr, I can see the display.
    #15
    lesh11
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    Re:Any success with Newhaven Display LCDs? 2011/02/02 12:20:35 (permalink)
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    I have some more information.
    The display works correctly if you connect the Vout and V1-V5 pins between the two connectors.  You also need  a potentiometer, as the internal contrast circuit does not work.

    Also interesting, the slave controller controls 108 columns, and the master controller controls 132 columns.
    #16
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