tft lcd colour problem arduino quotation

I rechecked my wiring compared to the sketch, and found that RST and DC/RS were swapped from the Adafruit library. However, compiling this sketch (whether default or changed to include the define call for RST) gives "Error compiling for Arduino - Exit status 1". From what I found online, this usually means there is a typo somewhere in the sketch - but this is an official sketch straight from the library. It should at least compile, whether or not the wiring is correct... am I missing a library or something? Using a different one than I should?

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Hi, i am using 1.8 TFT 128*160 LCD with spi communication. I am using esp32 microcontroller and trying to upload the image to the LCD but i am facing issues with the TFT library.

I am using the and libraries. The code I am using is an example from a video. However, I have edited the code because when I verified it, there were many bugs.

I really can"t think of any other reason than the internal refresh of the LCD screen (image RAM buffer to screen) being completly LOW, around 3Hz (instead of 71Hz or more, like LCD datasheet shows).

I have worked around my issue with the display in a fashion that I didn"t think possible with my lack of knowledge. So, the following is for people who experience the same problem or are just interested in the matter (conclusion at the bottom):

After searching for many, many different ways of describing my problem on Google, I came across this page on the Arduino forums of someone who had a completely different issue. However, Google found some text embedded in some code posted on that particular page (1.8" 128x160 SPI TFT LCD Display white screen - Displays - Arduino Forum), which had nothing to do with that problem, but was helpful for me:

Now I don"t have this particular display, but the description of the problem showed similarities to mine. And there was some sort of solution there as well. However, being the n00b I am, I understood next to nothing. I did give me the insight though, that I should try to make a workaround within the libraries that I will use in my programs. This way, I don"t have to add extra code within the programs to shift the dimensions, and I can also download other programs and run them just fine with my altered libraries.

However, this solution would mean constantly accounting for a weird resolution which would make developing programs much more difficult than needed, since I would have to constantly remind myself of that odd resolution. Plus, there would always be extra columns and rows that recieved some computing, which would limit the speed of the Arduino. So I looked further in the libraries to find the place where the (0,0)-coordinates were defined.

The problem wasn"t actually a problem within the files, so I suspect that there is indeed an alignment issue with my display. But I found the code within it, which I changed so that the starting point of the drawing shifted. After looking through all the libraries within the TFT folder (meaning: the TFT library, AdafruitGFX library and Adafruit ST7735 library) and trying to understand as much as I could, I found the location: within the Adafruit_ST7735.cpp file, there is code of the "Adafruit_ST7735::commonInit(...)" function. This function defines the value of "colstart" and "rowstart" as 0. I changed it to correspond with my deviation.

After multiple hours of work, the description of the problem in the quote above seems very logical to me as how to solve it, but I like how I kind of figured it out by myself as well, knowing very little of programming languages.

A TFT display resolution can be configured within Adafruit_ST7735.cpp within the Gcmd[] array within the Adafruit_ST7735::writecommand(...) function. The other arrays in that function can also be configured, but TFT.cpp specifically states that a TFT display is configured according to the Gcmd[] array. I don"t remember if it is necessary, or if I just added the following because I changed, tried and errored so much, but I also added the corresponding values to the "_width" and "_height" within the TFT.cpp file.

The origin of a TFT display can be configured within Adafruit_ST7735.cpp within the "Adafruit_ST7735::commonInit(...)" function. Changing the values of "colstart" and "rowstart" will change the row and column of the origin. By standard, they are both defined as 0 (-> colstart = rowstart = 0;), but writing them as two different definitions makes it possible to set a virtual origin, relative to the misaligned origin of the display.

In this Arduino touch screen tutorial we will learn how to use TFT LCD Touch Screen with Arduino. You can watch the following video or read the written tutorial below.

As an example I am using a 3.2” TFT Touch Screen in a combination with a TFT LCD Arduino Mega Shield. We need a shield because the TFT Touch screen works at 3.3V and the Arduino Mega outputs are 5 V. For the first example I have the HC-SR04 ultrasonic sensor, then for the second example an RGB LED with three resistors and a push button for the game example. Also I had to make a custom made pin header like this, by soldering pin headers and bend on of them so I could insert them in between the Arduino Board and the TFT Shield.

Here’s the circuit schematic. We will use the GND pin, the digital pins from 8 to 13, as well as the pin number 14. As the 5V pins are already used by the TFT Screen I will use the pin number 13 as VCC, by setting it right away high in the setup section of code.

I will use the UTFT and URTouch libraries made by Henning Karlsen. Here I would like to say thanks to him for the incredible work he has done. The libraries enable really easy use of the TFT Screens, and they work with many different TFT screens sizes, shields and controllers. You can download these libraries from his website, RinkyDinkElectronics.com and also find a lot of demo examples and detailed documentation of how to use them.

After we include the libraries we need to create UTFT and URTouch objects. The parameters of these objects depends on the model of the TFT Screen and Shield and these details can be also found in the documentation of the libraries.

So now I will explain how we can make the home screen of the program. With the setBackColor() function we need to set the background color of the text, black one in our case. Then we need to set the color to white, set the big font and using the print() function, we will print the string “Arduino TFT Tutorial” at the center of the screen and 10 pixels  down the Y – Axis of the screen. Next we will set the color to red and draw the red line below the text. After that we need to set the color back to white, and print the two other strings, “by HowToMechatronics.com” using the small font and “Select Example” using the big font.

In order the code to work and compile you will have to include an addition “.c” file in the same directory with the Arduino sketch. This file is for the third game example and it’s a bitmap of the bird. For more details how this part of the code work  you can check my particular tutorial. Here you can download that file:

Hi guys, welcome to today’s tutorial. Today, we will look on how to use the 1.8″ ST7735  colored TFT display with Arduino. The past few tutorials have been focused on how to use the Nokia 5110 LCD display extensively but there will be a time when we will need to use a colored display or something bigger with additional features, that’s where the 1.8″ ST7735 TFT display comes in.

The ST7735 TFT display is a 1.8″ display with a resolution of 128×160 pixels and can display a wide range of colors ( full 18-bit color, 262,144 shades!). The display uses the SPI protocol for communication and has its own pixel-addressable frame buffer which means it can be used with all kinds of microcontroller and you only need 4 i/o pins. To complement the display, it also comes with an SD card slot on which colored bitmaps can be loaded and easily displayed on the screen.

The schematics for this project is fairly easy as the only thing we will be connecting to the Arduino is the display. Connect the display to the Arduino as shown in the schematics below.

Due to variation in display pin out from different manufacturers and for clarity, the pin connection between the Arduino and the TFT display is mapped out below:

We will use two libraries from Adafruit to help us easily communicate with the LCD. The libraries include the Adafruit GFX library which can be downloaded here and the Adafruit ST7735 Library which can be downloaded here.

We will use two example sketches to demonstrate the use of the ST7735 TFT display. The first example is the lightweight TFT Display text example sketch from the Adafruit TFT examples. It can be accessed by going to examples -> TFT -> Arduino -> TFTDisplaytext. This example displays the analog value of pin A0 on the display. It is one of the easiest examples that can be used to demonstrate the ability of this display.

The second example is the graphics test example from the more capable and heavier Adafruit ST7735 Arduino library. I will explain this particular example as it features the use of the display for diverse purposes including the display of text and “animated” graphics. With the Adafruit ST7735 library installed, this example can be accessed by going to examples -> Adafruit ST7735 library -> graphics test.

The first thing, as usual, is to include the libraries to be used after which we declare the pins on the Arduino to which our LCD pins are connected to. We also make a slight change to the code setting reset pin as pin 8 and DC pin as pin 9 to match our schematics.

Next, we create an object of the library with the pins to which the LCD is connected on the Arduino as parameters. There are two options for this, feel free to choose the most preferred.

The complete code for this is available under the libraries example on the Arduino IDE. Don’t forget to change the DC and the RESET pin configuration in the code to match the schematics.

Uploading the code to the Arduino board brings a flash of different shapes and text with different colors on the display. I captured one and its shown in the image below.

Hi guys, over the past few tutorials, we have been discussing TFT displays, how to connect and use them in Arduino projects, especially the 1.8″ Colored TFT display. In a similar way, we will look at how to use the 1.44″ TFT Display (ILI9163C) with the Arduino.

The ILI9163C based 1.44″ colored TFT Display, is a SPI protocol based display with a resolution of 128 x 128 pixels. It’s capable of displaying up to 262,000 different colors. The module can be said to be a sibling to the 1.8″ TFT display, except for the fact that it is much faster and has a better, overall cost to performance ratio when compared with the 1.8″ TFT display. Some of the features of the display are listed below;

TheTFT Display, as earlier stated, communicates with the microcontroller over SPI, thus to use it, we need to connect it to the SPI pins of the Arduino as shown in the schematics below.

Please note that the version of the display used for this tutorial is not available on fritzing which is the software used for the schematics, so follow the pin connection list below to further understand how each pin of the TFT display should be connected to the Arduino.

When connecting the display, ensure that has a voltage regulator (shown in the image below) before connecting it directly to the 5v logic level of the Arduino. This is because the display could be destroyed if the version of the display you have does not have the regulator.

In order to allow the Arduino to work with the display, we need two Arduino libraries; the sumotoy TFT ILI9163C Arduino library which can be downloaded from this link and the popular Adafruit GFX Arduino library which we have used extensively in several tutorials. Download these libraries and install them in the Arduino IDE.

For today’s tutorial, we will be using the bigtest example which is one of the example codes that comes with the sumotoy ILI9163C Arduino library to show how to use the TFT display.

The example can be opened by going to File–>Examples–>TFT_ILI9163c–>bigtest as shown in the image below. It should be noted that this will only be available after the sumotoy library has been installed.

Next, an object of the ILI9163c library named “display” was created with CS and DC parameter as inputs but due to the kind of display being used, we need to include the pin of the Arduino to which the A0 pin of the TFT display is connected which is D8.

With the libraries installed, open an instance of the Arduino IDE, open the examples as described initially, don’t forget to make the A0 pin (D8) correction to the code then upload to the Arduino board. You should see different kind of text and graphics being displayed on the screen. I captured the screen in action and its shown in the image below.