Graphic LCD shield with EA DOGS102W display

To people who were asking about different backlight colors:

  • Board designed to use Amber backlight only with LED connected in series - see schematics
  • You can't use RGB backlight since it has a different connections
  • You can try to use WHITE backlight, but you will have to make some trace changes to convert serial connection to parallel. Serial LED connection will requre 6V that board does not have. I don't have a white backlight to test.

Thanks for something here,
Great advantage in my part,
God Bless!

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Here is another question that I want to answer in public forum:
Why schematics shows pull up resistors for every button, but they are not mounted on PCB?

Because Atmega microcontroller has internal pull-up resistors the can be activated via code.
Sample code shows how to enable them.
We added PCB pads since the same LCD can be used for other projects that may not have pull-up resistors.

10K resistors can be easily added in this case.

I still have few devices available if someone wants them.

How many pins of the Arduino does one of these shield use?? Are there any available pins?? Specifically, does it use pin 9-12 that the ethernet shield require?

Yes, it uses 9-11 and13 because it has SPI bus.
SPI pins D11 and D13, that can be shared with Ethernet
Pin 12 (MISO) is not used - LCD has one way traffic.

Control pins are on D9 and D10 (CS and A0 signals)
Buttons connected to D2-D5.

Other pins are available.
See schematics http://bit.ly/a5wIyK

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Edit: Shields compatable with Ethernet/SD card are available - see my post in display forum

Just a follow-up on compatability with Ethernet Module:

I was told by one of the customers that connector clearance issue can be easily avoded by using an extra set of stackable headers between Ethernet Shield and this LCD.
This will put Ethernet and LCD boards about 18mm apart.
At this point we don't have Ethernet shield to test this solution.

Extra headers can be purchased from one of resellers

We will have LCD shield with headers and modified pin 10 connection next week.

Can you make the analog gauge code available?

I posted Gauge code here:

Terrific. Thanks.

Hi,
Is any solution for DOGXL160 ?

I am sure DOGXL160 can be used with libraries after some modifications in 4-wire 8 bit SPI mode and possibly in 2 wire SPI 8 bit mode - Unfortunately I don't have this LCD to try.
If someone wants to donate LCD then I can try to get it going.

Probably should ask library developer Oliver Kraus if he is planning to add DOGXL160 in a near future.

Also each pixel uses 2 bits instead of 1 that will change SPI routine also.

This shield is nice,
quick questions.

  • are the input buttons multiplexed? How many pins do those use?
  • is this shield still available?

Inputs are not multiplexed, not too much you can save with 4 buttons by multiplexing them. See schematics above.

Yes, I still have few for sale - details are in PM.

We got working LCD Shield / Ethernet Shield combo:

  • Hardware clearance issue resolved with double headers as described few posts above
  • New libraries v 1.07 released to accomodate selectable CS pin number (D10 by default) - we are still tweaking minor issue found last night
  • We can supply a modified LCD Shield with CS on pin D8 or D7 per request, but as a standard we still ship CS on D10
  • We got wiorking demo UdpNtpClient and UDPSendReceiveString - I will post code changes soon, see pictures below
  • We can make an additional change per request moving one pushbutton from D4 to D0 (or some other pin) so SD card can be used also.

Just joined and seems I cant PM someone without having made at least one post. Would like to try out this shield.

I was looking for a way to handle pushbuttons with less inputs
Currently it uses 4 digital pins D2-D5 - one per each button

I made a prototype that returns pushbutton state via SPI with every LCD SPI write that will allow D2-D5 pins to be used for something else.
It will require a simple code modification.

Unfortunately current PCBs I have can't accomodate an additional small SPI controller, but we may implement it in future hardware designs.

For people who were asking about SPI keypad described above:
At this point I am not planning to make it in a near future because of cost associated with PCB manufacturing

But I am working to prepare information with "how to" if you want to do it yourself.

There is a new version of the Arduino Library for the DOGS102 available:

The new software library has optional speed improvements for the DOGS102 and also supports the DOGXL160 now.

Oliver

Update on compatablity with Ethernet shield:
After extensive testing we found that there is a simple way to make this shield compatible with Ethernet based shield:

  1. To provide clearance with Ethernet connector we found tall pin headers that allow to stay 1-2mm above ethernet connector
  2. CS pin D10 can be simply moved to D8 with a little solid jumper
  3. Pin D4 that used by a button and needed for SD card can be moved to D7 with a solid jumper

We tested LCD/keypad in this configuaration with Ethernet+SD tutorial form ladyada and it works great: for the test we redirected some serial port traffic to LCD.
http://www.ladyada.net/learn/arduino/ethfiles.html

Edit 3/5/2011: Modified shields for Ethernet/SD caompatablity are available!
Few un-modifed shields are still available - they are great is you don't need Ethernet combo.

Oliver and I also added future functionality that allows keypad data to be sent via SPI back to the Arduino

This future design will use onboard ATTINY261 for flexibility and allow A0 / CS selection from available 4 pins: D7-D10.

I am goning to publish hardware and the code, but it requires a new PCB that we did not make yet, may be some time in a future.