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Tutorial: Instalación de ...

Forum: Teensy
Last Post:  CandelaRDZ
22-07-2019, 22:05 37
» Replies: 8
» Views: 582
Libros sobre microcontrol...

Forum: Bibliografía
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Forum: STM32
Last Post:  andromeda92
27-05-2019, 17:59 54
» Replies: 3
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Using non-ascii character...

Forum: Pantallas FT810, FT811 y FT813
Last Post:  puddletown
26-04-2019, 15:00 34
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Driving 8.0" 50 pin displ...

Forum: Teensy
Last Post:  desiredshoe
17-04-2019, 03:59 43
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Posted by:  andromeda92 - 03-05-2019, 02:55 43 - Forum: STM32 - Replies (3)


How using touch screen capacitive with this screen with library GD23Zxx ?

what pin from screen must i connect to STM32F767ZI  (arduino 1.8.9) ?

Thanks in advance.

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  Using non-ascii characters with the FT810 chip?
Posted by:  puddletown - 26-04-2019, 15:00 34 - Forum: Pantallas FT810, FT811 y FT813 - No Replies


Is it possible to use non-ascii characters with the FT810 chip. I have been looking at a guide using the FT800 chip using custom fonts with non-ascii characters. This can be done with the hex escape character \x. 

But can i do this with the FT810 chip?


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  Driving 8.0" 50 pin display
Posted by:  desiredshoe - 17-04-2019, 03:59 43 - Forum: Teensy - No Replies

Hello, I'm wondering if there is anyway this LCD display can be used with the HOTMCU FT811 board running GD23z code.  I'm not able to find any 40 pin LCD screens in 4:3 ratio with this size, I need at least 120mm vertical active area for my project so this display would be perfect.


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  Touch screen not working? Stuck in wiring.h loop
Posted by:  puddletown - 05-12-2018, 17:32 42 - Forum: Pantallas FT810, FT811 y FT813 - No Replies


Sorry i m an English speaker only. Hope you can answer this. 

I m using the ft810 driver and 5inch screen. I managed to get some of the examples from the driver working and displaying on the screens, however i m having problems with the touch functionality. I have a DS3231 EEPROM connected to my MCU and that seems to be working ok. However when I touch the screen (the red circle in top right hand corner) the screen goes white. 

After debugging where the code is getting stuck the problem seems to be the finish() function. This finish function uses GDTR.finish() which in turn is defined as 

  void finish() {
    wp &= 0xffc;
    __wr16(REG_CMD_WRITE, wp);

    while (rp() != wp)
 // Serial.println("test3");

The code gets stuck in the loop --> while (rp() != wp)

I printed off the values for rp() and wp. The values i m getting for rp() are 512 and the values i m getting for wp are 520. So obviously the loop wont break and will run continuously. 

Is there something wrong?

My setup is as follows

MCU --> STM32f429ZI

CS --> PA4
CLK --> PA5
MOSI --> PA7
MISO --> PA6
Scl -- > B6
Sda -> B9


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  Bitmap corruption when swapping pages
Posted by:  lorcap - 22-11-2018, 11:56 54 - Forum: Codigos - Replies (2)

Hi everyone,

in my project (not using gameduino library) I used to load bitmaps into half RAM_G when switching from one page to another. This way, the switch was instant and smooth.

The project has grown to a point where bitmaps of some pages can no longer fit in half of RAM_G. The trick above causes a temporary bitmap corruption while new images are being loaded and before swapping, because new bitmaps override old ones.

Currently, I decided to draw a blank page lasting 100-300ms while loading the new bitmaps. This avoids to show corrupted images.

I was wondering if there exists a better technique which avoids the blank. Ideally, I should stop/freeze the graphic engine and the end of a frame, load new images, and draw the new page. I tried setting REG_PCLK to 0, but an horizontal white line is shown for 100-300ms, which is not very good-looking.

I had a look at gameduino library, but neither GD.swap() nor Bitmap::fromfile() seem doing anything special. Bitmap::fromtext() only seems using the REG_PCLK technique.

Thanks in advance for your advice.

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