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481  Using Arduino / Displays / Re: ST7920 LCD - Display problem. on: January 21, 2014, 01:22:20 pm
What is the exact display type (link)?
How did you wire the var pot (picture)?

Oliver
482  Using Arduino / Displays / Re: Problem with UTFT Library and TFT_320QVT screen (using Arduino Due) on: January 20, 2014, 01:56:08 pm
Quote
Do you have any advice on how to make the words actually appear on the screen?

After all the discussion and the additional information provided, my personal suggestion is to use the software which is provided and suggested on the elechouse page: http://www.elechouse.com/elechouse/index.php?main_page=product_info&cPath=148_211&products_id=2217

Once it is confirmed, that the HW is working,, you could move to UTFT.

BTW: The TFT has an 16 bit parallel interface.

Oliver
483  Using Arduino / Displays / Re: Problem with UTFT Library and TFT_320QVT screen (using Arduino Due) on: January 20, 2014, 12:41:56 am
Does your display work with the libraries from elechouse.com? Once this is known to work, it is easier to move to UTFT.

Oliver

Edit: Looking at the tech docs, it seems that the SPI (6-pin-header) is only used for the SD card.
484  International / Deutsch / Re: Arduino Kurs in Stuttgart on: January 19, 2014, 05:13:00 pm
Hallo DEAFBOY

Was ist denn nun eigentlich das Flattichhaus? Das hört sich doch wie ein Hackerspace an?

Wenn ich mal den Uwe weglasse (von dem ich ja nicht weiss, wo er herkommt), dann zähle ich in diesem Thread genau 5 Leute, die an Arduino-Elektronik im Raum Stuttgart/Böblingen (vielleicht) Interesse hätten. Ob sich da jemals ein Hackerspace entwickeln kann?

Wie gesagt, wenn es mal was gäbe (Hackerspace/Stammtisch), dann käme ich ja mal vorbei...

Oliver
485  Using Arduino / Displays / Re: Problem with UTFT Library and TFT_320QVT screen (using Arduino Due) on: January 19, 2014, 05:01:08 pm
I agree, that there is not much information in the original post. However it was mentioned "Due" in the title...

From a technical point of view: There was one thread in the german forum, which includes the answer from SainSmart (in english)
http://forum.arduino.cc/index.php?topic=121418.0

The TFT will work with UTFT on the Uno  and the Mega with 0023 and the 1.0.1 IDE. Also the SainSmart lib will work. However, Arduino Due was not mentioned (in fact probably not available at that time), so maybe there is an incompatibility between the Due and the TFT and/or UTFT.

Typical problems include:
- 3.3V: Due is a 3.3V device, all other Boards are 5V. Maybe the TFT expects 5V
- Pin assignments. Maybe different pins need to be used for the Due
- Due not supported in UTFT: Problem is, nobody can test all cominations. So UTFT might be compatible in general with the Due, but maybe the specific shield is not supported.

How to track down the problem:
Try to figure out whether the correct signals are applied to the TFT shield. Best is to use a scope...

Oliver
486  Using Arduino / Displays / Re: U8glib: Graphics Lib for LCDs and OLEDs on: January 19, 2014, 01:22:39 pm
So it uses HW SPI if you define the HW SPI pins in the setup function?

The opposite is true, see page http://code.google.com/p/u8glib/wiki/device.

Text copy from there:
Code:
SW SPI u8g_dev_st7565_64128n_sw_spi U8GLIB_64128N(sck, mosi, cs, a0 [, reset])
HW SPI u8g_dev_st7565_64128n_hw_spi U8GLIB_64128N(cs, a0 [, reset])


Oliver
487  Using Arduino / Displays / Re: How to use this 128X64 graphic LCD by Arduino UNO? on: January 19, 2014, 01:19:20 pm
@raschemmel:
Serial monochrome displays usually do not have a MISO output. The microcontroller does not receive any information from the LCD: This is one of the big problems with monochrom LCDs.

@greeng:
To suggest anything usefull, some pictures, exact setup and the constructor used, would be nice.

Quote
Could I check the source code about send data to the IC ram something like that ?
it is open source. All source is included in the zip file or on the u8glib google page: http://code.google.com/p/u8glib/source/browse/#hg%2Fcsrc.

Oliver
488  Using Arduino / Displays / Re: How to use this 128X64 graphic LCD by Arduino UNO? on: January 19, 2014, 03:00:01 am
Indeed timing needs to be correct, but all timing values are minimum values. That means for example if CD is changed, then the software has to wait at least some nano seconds. Waiting longer is not a problem. Slow controller like the Arduino Uno easily fullfill these conditions.

Oliver
489  Using Arduino / Displays / Re: U8glib: Graphics Lib for LCDs and OLEDs on: January 18, 2014, 04:33:02 pm
U8glib supports SW SPI (with any pins), but also HW SPI.

Oliver
490  Using Arduino / Displays / Re: large backlight monochrome lcd on: January 18, 2014, 05:15:36 am
Hi Marco

Monochrome displays above 5" usually are driven by the RA8835 controller. I do not know any Arduino Library for it.
Nice displays are available from buydisplay.com. I recently added support for one of their 4.3" displays to U8glib.

Oliver



491  Using Arduino / Displays / Re: How to use this 128X64 graphic LCD by Arduino UNO? on: January 14, 2014, 01:47:42 pm
Connecting 3.3V device to a 5V board can destroy the 3.3V device. You really need a level shifter.

Using U8glib should be simple. Connect your display as shown in the pictur.

Install U8glib (can be done through the Arduino IDE meanwhile). You will find some U8glib examples in the IDE.
Start with the HelloWorld example.

Uncomment one of the following constructors (remove the // at the beginning of the line) :
//U8GLIB_DOGM128 u8g(13, 11, 10, 9);      // SPI Com: SCK = 13, MOSI = 11, CS = 10, A0 = 9
//U8GLIB_LM6059 u8g(13, 11, 10, 9);      // SPI Com: SCK = 13, MOSI = 11, CS = 10, A0 = 9
//U8GLIB_LM6063 u8g(13, 11, 10, 9);      // SPI Com: SCK = 13, MOSI = 11, CS = 10, A0 = 9

Compile and upload. 
If nothing appears on the display, the wiring might be wrong or your display has been destroyed.
If you see something, try all constructor one after the other, until you get the best result.

Oliver
492  Using Arduino / Displays / Re: HY28B SPI/Serial Display on: January 13, 2014, 03:49:00 pm
Nice finding, but i think this is far away from a usefull library smiley-sad

Oliver
493  Using Arduino / Displays / Re: HY28B SPI/Serial Display on: January 13, 2014, 02:43:59 pm

At the weekend i was looking at the ILI9325 SPI protocol. Now looking at the PCF8833 (which is the controller for the LPH9135) i would say that the SPI protocol is totally different.

I did also look at UTFT.h: The ILI9325 is only supported in 8 Bit or 16 bit parallel mode.

All in all, it seems that UTFT does not support your display in SPI mode.

Oliver

494  Using Arduino / Displays / Re: How to use this 128X64 graphic LCD by Arduino UNO? on: January 13, 2014, 01:24:52 pm
At least two of the caps are required for the internal charge pump. The LCD requires about 10V which are generated from 3.3V with this charge pump. If you see black lines, then this charge pump works fine. You should be able to measure about 10V at one of the caps.

Not sure how we could support you further. Maybe it makes sense that you provide a complete schematic of your setup, so that this can be reviewed.

Oliver
495  Using Arduino / Displays / Re: U8glib: Graphics Lib for LCDs and OLEDs on: January 12, 2014, 07:24:23 am
With the SW SPI constructor
U8GLIB_SSD1306_128X64(sck, mosi, cs, a0 [, reset])
you can use any Arduino pin. For example
U8GLIB_SSD1306_128X64(1,2,3,4)
tells U8glib, that the sck line of the display is connected to pin 1 of the Arduino board, MOSI (data) line is connected to pin 2 of the Arduino and so on. In fact you can mimic the Adafruit setup with U8glib (pin values from your table):
U8GLIB_SSD1306_128X64(10, 9, 12, 11, 13)

Also ensure, that your display is put into serial mode.

Oliver


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