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Topic: (128x64) Dot Matrix GRAPHIC LCD (Need advice) (Read 9 times) previous topic - next topic

liudr

There are at least 3 different pin mappings on 128*64 displays. Please read the link I posted. I warn you not to use your shield on the dot matrix display. You could be shorting 5V with GND if the pins are not compatible. You will need to suffer with jumper wires unless someone has made a shield for it (maybe). ]:)

BTW, I have my own character LCD shield, it's just more awesome,IMHO, with RTC, EEPROM, and GPS etc
http://liudr.wordpress.com/phi-1-shield/

mrquesito

Right now, I'm making a project involving a ks0108 display where saving up is really important. Since I wanted to use a 328, and still use some pins, I've set up an ATMEGA8 (7.somthing Kb of free space) on a breadboard, and uploaded to it a simple code with the library and a serial communicacion protocol, to interface with the Duemilanove (the one that makes all the calculus and reads the sensors).
It works great, at this very moment I'm looking at it, and it's displaying a real-time sinus wave generated by the own ATMEGA8, so so far it doesn't seem to be too slow.

Salu2

Staedtler

@liudr
That is an awesome shield! A lot of things going on on that one! I just gave you another good Karma for that one.
You should sell that one on Ebay, for sure.

By the way, thanks for your advice, but you should know that I am one of those one who really read datasheets and always have a calculator on my left ;)
I really take the extra job of modifying boards.


@mrquesito
That is exactly what I was thinking off !
Can you share a simple example?

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Eight bytes walk into a bar. The bartender asks, 'Can I get you anything?'
- 'Yeah', reply the bytes

mrquesito

#8
Jan 30, 2011, 01:34 am Last Edit: Jan 30, 2011, 01:36 am by mrquesito Reason: 1
Sure! Here you are some fresh pictures (I took them this morning):




The first one is the Atmega8 attached to the GLCD, the next is the same, but with the Duemilanove (working as a power supply), and the last one shows how using the 2009 as GLCD "driver" makes pins disappear.

It's quite straightforward to do this: burn bootloader into atmega8, upload the sketch using the FTDI chip, wire up, and see how the sine is generated :D

EDIT: does anyone know how to reduce the size of the images on the forum?

Staedtler

That looks awesome.
Can you post the code of each board?

PS: I have no idea how to reduce the size, but you can always use http://imgur.com/ to upload and convert to a reasonable size.
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Eight bytes walk into a bar. The bartender asks, 'Can I get you anything?'
- 'Yeah', reply the bytes

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