MCUFRIEND_kbv Library for Uno 2.4, 2.8, 3.5, 3.6, 3.95 inch mcufriend Shields

Other Hardware Displays
261

Hi david,
thanks for your help!

The IDE version is 1.6.6
the example is File->examples->Mcufriend_kbv->aspect_kbv

the libraies are

#include <Adafruit_GFX.h> // Hardware-specific library
#include <MCUFRIEND_kbv.h>
MCUFRIEND_kbv tft;

Sorry I don't know how to put it within code tags... hope it works

the error message is:

Arduino:1.6.6 (Windows 10), Scheda:"Arduino/Genuino Uno"

avr-g++: error: missing filename after '-o'

exit status 1
Errore durante la compilazione

Questo report potrebbe essere più ricco di informazioni con
"Mostra un output dettagliato durante la compilazione"
abilitato in "File > Impostazioni"

thanks again for your help

262

The "CODE-tags" is the icon at the top left of your Edit window.

You can type your message and experiment with CODE, quotes, italics ... and use the [Preview] button to see what the message will look like.

The Forum has full instructions for "how" to post a message. I presume that you will be able to read them in your own language. Or perhaps you need to ask Google to translate.

I just tried "aspect.ino". It built just fine with v1.6.6 onto a Uno target.

David.

263

There must be a problem with my edit window because there's nothing at the top lef of it. Actually the edit window I use is "Quick Reply", I don't know if it's a different one.

Anyway I realized it gives the same error with all the sketches I try. It must be a library or a ide problem I suppose.

264

I am on a Samsung Tablet. Portrait mode.

As I type into the "Quick Reply" window, I see some yellow emoticon icons directly above the typing area.
Above these are a selection of editing icons for code </>, bold B, italic I, ...

But I can equally well type these by hand. i.e. with the square brackets. just like HTML.

I am sure that the Forum tutorials explain things better than I can.

But the best feature of all is that you can use the [Preview] button to see what your message looks like. Or even tidy it up after posting.

David.

265

Thanks David,
I'll do it next time

Greg

P.S. in the preview frame I can see the icons you referred to!

Now it's all more clear

266

Hello, I used Mcufriend_kbv library, Adafruit-GFX-Library-master, Touch-Screen-Library-master. Faced with the problem of which is shown in the video - YouTube
Can anyone encountered this problem and suggests why the sensor works well? Powered by an example from this video and did everything in the same way Arduino Ili9488 480x320 TFT LCD Review - YouTube
Sorry for my bad English.

267

Both of your videos seemed to show a TouchScreen that did not follow the stylus very well.

They also showed a screen with inverted colours. All "Paint" examples that I have ever seen, use a BLACK background.

If your display does not show BLACK, RED, CYAN, ... properly, say so.
I can write a "graphictest_kbv" program that says RED, GREEN, INVERT, ... but if no one reports a problem, how do you expect me to fix it? i.e. if it says RED then you should see RED.

The Resistive Touch screens work fairly well. A cracked glass means that the Touch is broken. A broken Touch will never work.

David.

268

Thank you for your response, David! Indeed, I noticed that the colors do not match, but I'm just starting to explore the world, and Arduino is difficult for me to immediately understand why the colors are wrong. I bought a screen on Aliexpress. Externally, the whole screen, not damaged, but I suspect that faulty touch screen coating. I want to ask, do you think that in my case, a sensor malfunction? Or follow the wrong screen stylus because of the wrong code?
Display defined number ID 9486 http://my-files.ru/m49i2t
The video shows that at the end of an instant the screen background is black and the color change, it can be interesting: - YouTube
http://my-files.ru/34jp63
http://my-files.ru/xy5ddy

Example GLUE_DEMO_480x320 does not work, a white screen , sometimes changes color the brighter the darker but still white.

269

You have an ILI9486 controller but the colours are all inverted.

In the Mcufriend_kbv.cpp file, edit the begin() method:

    case 0x9486:
        _lcd_capable = AUTO_READINC | MIPI_DCS_REV1 | MV_AXIS;  // remove the REV_SCREEN attribute
        static const uint8_t ILI9486_regValues[] PROGMEM = {
        ...

My ILI9486 shield is 3.5" and needs the REV_SCREEN attribute. Your 3.95" shield obviously does not need REV_SCREEN.

I am horrified by your wiring. The shield should plug into your Due as Nature intended.

You can still access all the unused Due headers. just use some angle-header strip.

Look very carefully at your Touch Screen. Are you sure that the glass is not cracked?

Everything should work 100%. It is very important that you report any problems. The "edit" is very simple.
Alternatively, you call tft.invert(true) or tft.invert(false)

David.

270

David,

Thanks for your answer.
I have another question, I want to use the mcufriend 2.4 shield (with ili9341) on an Uno, and also use I2C.

As I understand it, i2c requires pin A4 (SDA), A5 (SCL), which are taken by LCD_RST, LCD_CS.

In code I see

MCUFRIEND_kbv(int CS=A3, int RS=A2, int WR=A1, int RD=A0, int RST=A4);

In another post I saw that you could snip the A$ pin from the shield, but you said there not to do it in ili9345 i think.
Can I snip it here?

271

LCD_CS is on A3. A5 is unused.

Solder a 10k pull-up from LCD_RESET pin to the 5V pin on the shield. You should be able to solder to the top of the pcb pins safely.

Now you can snip off the A4 pin from the shield.

You fit a 2-pin angle header into the Uno's I2C socket. You can steal 5V, 0V from the ICSP headers.

Personally, I like the Uno clones that have holes for spare headers.

David.

272

I have that clone which has extra holes :slight_smile:

I will solder the 10k.

another q:
i want a good library for creating a menu and buttons with touch, that would work with this and on an uno (which does NOT have much memory), any suggestions

273

Buttons are pretty easy with the "Adafruit_GFX_Button" class.

If you want a pull-down menu arrangement, it becomes difficult. i.e. reading and storing the underlying screen contents.

There is a nice Frenchman who was showing his Karaclass library.
working with Marek's TFT library

It should work with your display if you change it to use TouchScreen.h

I have not tried it myself. I might have a go later.

David.

274

do u have a link to that french mens work ?

275

Yes, I have edited message#272. It was Marek's TFT library.

David.

276

david:

The lib u recommended uses duotimer, I have an Uno, so ofcourse no good,
Can you recommend a different lib instead of duotimer? I am this close to compling :slight_smile:

277

Well, I tried building the demo for a Due. It required some mystery libraries. I gave up.

I doubt if the Karaclass class will be practical on a Uno.

What do you want to do?
Have you tried the Adafruit_GFX_Button class ?

Regular buttons are easy. I suggest that you do not clutter the screen with too many buttons. Draw a fresh screen with fresh buttons that reflect the current state.

David.

278

  1. I want to build a display lib, to connect to my esp8266

  2. I can compile most of his code, just need to replace duetimer - maybe with schedular

  3. I might go the buttons only route, I want to first see what is possible, with what is out there.

  4. my ultimate goal was to have this working on esp8266 only, but I chose the wrong display, because this does not have xpt206 that I thought it would (I did not know much about displays when I bought it cheap)

279

It is a difficult choice.

Either you provide several simple examples that demonstrate one method at a time.
Or you provide a complex Demo that shows off every method.

As people have noticed, my "demo" only just fits on a Uno. A Duemilanove, Leonardo, ... has insufficient memory.

Likewise, my library requires "Adafruit_GFX.h" and sometimes "TouchScreen.h"
If you need non-standard headers, they can be local to the sketch folder.

David.

280

Thank you very much , David ! Removing REV_SCREEN attribute for my 3.95 inch screen help to correct color, all colors are now displayed as intended.
About the touch screen . I contacted people that they, too, met the same problem with a touchscreen , I am inclined to the version that this factory marriage , since those people , too, is completely a screen without physical defects , but the touch screen behaves just like mine .