LCDInfo.com

Hi All,

I just got this little display working, but its terribly slow doing it with big banging. I'm using an embedded RISC uP in a zigbee module that has built-in SPI hardware support that would most likely improve the speed, but its only for 8 and 16bit. Could I use this 16bit SPI HW interface with only 9bits of valid data? How would the EPSON controller handle the 7 extra clocks of bogus data? (I gave this a try and it didn't work... but just wanted to see if there might be a way to hack around this -- feeding in the last bit over and over??)

Many thanks guys. I also have some drawing and converting routines to take Adode Photoshop RAW files and turn them into the 332 8bit format. Anybody interested in those?

Thanks guys!
brian (at)
ecosynse (dot)
com

I noticed on the sparkfun site that the kind of unit I have still has the epson controller even though the ribbon cable isn't green, but I tried writing something for the phillips controller anyway and still no luck. I have my current code here http://www.personal.psu.edu/users/d/a/dak246/Code/NokiaLCD-Epson.c. The only possible problems left could be that: the screen is faulty, my spi code is faulty or my initialization code is faulty. I've tried every possible initialization configuration I could find for this controller and still nothing, which leads me to believe its not the problem. My spi code is borrowed from a working example too. I don't know what else to try...any ideas?

Hi all,

I just got the Espon LCD from Sparkfun.com, but I am having trouble compiling the example code given on the website. Since it's .cpp files I can't seem to run it with AVR studio 4. In fact I have tried many other example codes from various website but even though I am able to run those codes and seems to be able to program the ATMega32L microcontroller, but I still don't see anything except blue background on the LCD. Can anyone please give me some advices? A working example code would be even better.

Thanks

Hi everyone.
It's my first post here, so i'd like to thank everyone posting in this tread for sharing their knowledge

I also have a question: Has anyone figured out the screen scrolling on phillips controller? The display works fine for me, i just can't make the contents scroll: if i understood correctly, i have to send the VSCRDEF command, with three arguments describing what portion of the screen is to be scrolled, and then i can continuously send SEP commands with one argument each, describing how far i want the screen to scroll. But this sequence doesn't work for me. Am i missing anything here?

@dak246 - good to see a fellow assembly programmer around
I think i can see your problem. Your data transfer protocol seems to be faulty.
When you do:

you check the least significant bit of the data, then shift bits right, cecking the second bit, etc.
AFAIK, you should transmit the most significant bit first (at least this is the case with phillips controller), so this portion of code should be:

Otherwise than that your code seems fine.

Here's my sending routine:


with defines and macros put in the header, just to make life a bit easier:


Works like a charm for me.

And if you want to make sure what controller you have in your lcd, i'd suggest to use the program from this site:
http://electronique.marcel.free.fr/LCD% ... leurs.html
It can drive both epson and phillips-based lcd's, so if one of them works, you'll know which lcd you have. If neighter works - well, you'll just have to get a new display

I hope it helps.

Hello,

Is anyone familiar with using this display/controller (EPSON) in the 12-bit color mode? I don't seem to be able to write a single pixel... the controller seems to require 3 bytes to complete a data write in this mode, but that turns on 2 pixels instead of one. Also, it seems that you cannot start writing pixels at an odd column address when in the 12-bit color mode...

Am I just nuts or have others experienced this complication...

(By the way, everything works correctly and as expected when the 8-bit mode is selected...)

Thanks, Jon.

Hi skl10,

I have this LCD panel working with an MSP430 controller... I wrote a small demo program that I'd be glad to send you if you are comfortable translating the code from MSP430 to ATMega (and making adjustments for the different hardware connections you'll have).

Let me know...

Regards, Jon.

I noticed in your code that you set the 1st parameter of the VOLCTR command to 5... I've been using 24 and not doing further adjustment with the VOLUP/VOLDN command (in your loop at the end of the LCD initialization sequence). Could it be that you just can't see what you've drawn because the contrast is too low?

Regards, Jon.

I too have the new displays and carrier boards from sparkfun. After changing the value of the two VOLCTR data bytes from (0xff, 0x01) on the old displays with green connector, to (24,3) for the displays with the brown connector, I brought an image up, but the brightness (contrast too?), seems to fluctuate randomly at low frequency. This does not appear to be high frequency noise from the power supply.

Has anyone else seen this? I've tried 4 of these new displays and they all seem to have the same problem. Again, its like every other second or so, the brightness changes, and sometimes even causes a flicker.

Any suggestions?

Thanks,
Brian
brian
(at)
ecosynse
(dot)
com

Hi, all

I'm newbie here, recently I'm working on Nokia 6100 LCD Epson one, I want to implement 4 push buttons (select, back, up and down) work with a menu, which can choose one function. I want to know how can I make it, is there a sample code about that? If someone worked on it, please help me, thanks a lot.

And another problem, I can draw many images with some functions, but how can I make a bar, I mean just this bar can move on the images, like I want to choose one part on the menu, and keep the image not move. Because I did two images, one is a menu, the other is the same menu with a bar, when I display them, it always clear the first one, and takes a lot of time to show the second one, not looks like a real menu. So please tell me what can I do?

The demo code that Olimex offers for the MSP430-4619LCD board (which uses the same LCD) has a functioning menu in it - perhaps you could adapt or adopt something from it...

www.olimex.com/dev/soft/msp430/MSP430-4619LCD.zip

Good luck!

I'm having trouble too. I'm using a Sparkfun LCD (Epson controller, AFAIK) with an Arduino microcontroller with code from here: http://www.arduino.cc/playground/S1D15G ... 10NokiaLCD

The LED inits, displays my image quite brightly, but then about half a second later the image gets almost invisibly dim. The backlight remains on. Have other people experienced this problem?

Thanks jmdhuse

Hey all!

I recently bought the Nokia 6100 knock-off lcd and the carrier board from sparkfun.com. I have an atmel atmega32, mega48, and mega168. I'm using avrdude to program the chip and programming in c/assembly. Does anybody have any simple sample code that I can use to display something on the lcd? So far nothing has worked. I've gotten the lcd to light up, but that's it. I'm using the code provided on this page: http://www.e-dsp.com/controlling-a-color-graphic-lcd-epson-s1d15g10-controller-with-an-atmel-avr-atmega32l/

There are several items mentioned that I haven't used. I didn't use any resistors or the 4mhz quartz. Are they important? Any help would be appreciated. Thanks in advance.

-tr0picana

If you are comfortable moving code from 1 architecture to another I can send you a zip file with a demo application for this LCD written for an MSP430 architecture microcontroller...

Regards, Jon.

Unfortunately, I don't think I can do that

Right now I think my problem is that I didn't follow the circuit diagram.

Any other ideas?

*EDIT*

I did exactly as the circuit diagram suggested, minus the resistors because I wasn't given any values. It still doesn't work though!! Help would be Greatly appreciated.

- tr0picana