3.5 tft lcd adafruit made in china

I changed the Adafruit libraries for TFT: GFX , TFTLCD and TouchScreen. I join all in this one library, the library SPFD5408, to avoid problems with duplicate libraries and enables also have the original library Adafruit ready for use in other projects with another TFT hardware.

The RPi LCD can be driven in two ways: Method 1. install driver to your Raspbian OS. Method 2. use the Ready-to-use image file of which LCD driver was pre-installed.

3) Connect the TF card to the Raspberry Pi, start the Raspberry Pi. The LCD will display after booting up, and then log in to the Raspberry Pi terminal,(You may need to connect a keyboard and HDMI LCD to Pi for driver installing, or log in remotely with SSH)

1. Executing apt-get upgrade will cause the LCD to fail to work properly. In this case, you need to edit the config.txt file in the SD card and delete this sentence: dtoverlay=ads7846.

This LCD can be calibrated through the xinput-calibrator program. Note: The Raspberry Pi must be connected to the network, or else the program won"t be successfully installed.

I"m considering making a PJRC product for a 3.5 inch TFT touchscreen display with 480x320 resolution. Conceptually, it would be pretty similar to this Adafruit product, with SPI interface on the bottom side and 8 bit parallel interface on the top.

A couple major decisions to make are the type of TFT and touchscreen. IPS displays are available, which offer superior color range and wide viewing angles. Normal TN types, like we have now with the common 2.8 inch side, are less expensive. Likewise, touchscreens come in cheap resistive which detects only a single touch point and requires significant pressure, or more expensive capacitive touch that works similar to cell phones and tablets. Different touch controller chips can be used, some detecting 2 touch points, others up to 5 points.

@DonpK Sorry, but I can"t follow what you are testing here. When I look over your examples the Adafruit version is using Hardware SPI and the GUIslice config has a different set of pins in use, maybe software spi.

Again, your two test programs don"t make a fair comparison so I modified them for your display and made the Adafruit and GUIslice versions as close as possible. Now I don"t have your hardware so I can"t test further so that"s up to you and Calvin but at least the numbers will be correct as far as comparing them side by side.

I am testing two different TFT-LCD displays - the Adafruit 3.5" breakout display, and the East Rising 3.5" display. Both displays are using ATMega1284P microcontrollers. Both displays are using SPI.

I"ve attached your modified test sketches as well as a text file giving the redraw time results. There are four sets of timings: one for each display using the Adafruit graphicstest sketch and one for each display using the GUIslice sketch. The GUIslice library is GUIslice-WIP-CapCalib_01-04-21 which Cal wrote for the East Rising display. The Adafruit display uses the regular

@Pconti31 @ImpulseAdventure Thanks Paul. I tried your version of ili9488.cpp. On the East Rising display, the PCDPKgraphicstest.ino redraw timing sketch runs about 8 times faster with your ili9499.cpp versus the ili9499.cpp file which is in the Arduino ILI9499 library. However the same sketch redraws 15 times faster on the Adafruit. Note that the East Rising display is using GUIslice-WIP-CapCalib_01-04-21 and Adafruit display uses GUIslice 0.16.0. Note also, that the "regular" ILI9488 library is a version Cal gave me last November when we started working on this project. I"m not sure whether he modified the standard Jaret Burkett ILI9488 library.

@DonpK @ImpulseAdventure I don"t own one so maybe you a should post a new issue asking for recommendations from someone using such a display. You could also try using a faster MCU like the ESP32 with TFT_eSPI which claims support for ILI9488 spi displays. Also, the chinese code lovyan03/LovyanGFX claims to be even faster then TFT_eSPI.

Also, Don -- I may have overlooked something, but I"m wondering if you might be able to use the latest GUIslice version instead of the CapCalib version? I believe all of those changes were integrated. That way, perhaps one could compare apples-to-apples with the same code versions of GUIslice? ie. use the same "latest" GUIslice for both the Adafruit display and EastRising display modes?

I ran the redraws tests on the two different TFT-LCD displays - the Adafruit 3.5" breakout display, and the East Rising 3.5" display. Both displays are using ATMega1284P microcontrollers. Both displays are using SPI. Both tests used the latest GUIslice Version 0.16.1.2

Both tests used PCDPKgraphicstest_V2.ino (attached) which redraws the screen alternating between two colors. The Adafruit displays uses ard-adagfx-hx8357-simple.h and the EastRising display uses ard-shld-eastrising_35_ili9488_cap.h (attached).

The Adafruit display redraws about 15 times faster than the EastRising display - 541,704µS for the Adafruit versus 8,422,840µS for the EastRising display.

It only supports 18bit color not 16bit color like the Adafruit. This means it needs to write one extra byte for each color. Or 153600 extra writes for a screen fill.

I"ve noticed a problem that does not occur on either the Adafruit or EastRising displays using GUIslice Ver. 0.16.0, but does occur on both displays using Ver 0.16.1.2. If a button is pressed, say on the KeyPad, the button will freeze up in the "Selected Color" mode. Sometimes repeatedly pressing the button will get it to complete its function, sometimes the entire display is frozen and needs to be rebooted. This is an intermittent problem.

I believe you would be better off coming up with a small repeatable sample with a list of touches that cause the problem using the standard Adafruit TFT display and posting it. Leaving the debugging to Calvin.

The problem involves the display freezing after a touch. I"m using the latest versions of GUIslice and Builder. The problem does not occur on the Adafruit resistive display, only the EastRising capacitive display.

I"ve also contacted the person who has written a driver for the FT6236 which is the actual controller in the EastRising display, not the FT6206, although Adafruit claims their library works with the FT6236.

I tried two versions of ex04_ard_ctrls- the version from the Builder examples and the version from the GUIslice-only examples. On both, I increased the dimensions of the Checkbox widget on the 3.5" display to make it easier to test the touch action.

After viewing your video I tried my Mega with adafruit"s 2.8 ili9341 display with using the stmpe610 resistive touch chip and easily reproduced the problem using ex26. This is using GUIslice version 0.16.1.3.

Great! I’m really glad to hear that it was observed on the Adafruit 2.8 resistive since that means I should be able to recreate it on my own hardware too.

While I couldn"t reproduce the same behavior with my Adafruit 2.8" resistive display on ex26 while long-touching & releasing over the same key, I can observe it if I touch a key and drag outside of the keypad before releasing the touch. It wasn"t actually a "freeze" -- it just didn"t release the glow state in this "TOUCH_UP_OUT" transition.

The update has also corrected the "freeze" problem on the EastRising 3.5" display. One note: the #include "../configs/ard-shld-eastrising_35_ili9488_cap.h" is not in the GUIslice_config.h file. However, there is a ard-shld-eastrising_35_ili9488_cap.h file in the configs folder.

In this article, you will learn how to use TFT LCDs by Arduino boards. From basic commands to professional designs and technics are all explained here.

There are several components to achieve this. LEDs,  7-segments, Character and Graphic displays, and full-color TFT LCDs. The right component for your projects depends on the amount of data to be displayed, type of user interaction, and processor capacity.

TFT LCD is a variant of a liquid-crystal display (LCD) that uses thin-film-transistor (TFT) technology to improve image qualities such as addressability and contrast. A TFT LCD is an active matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven LCDs with a few segments.

In Arduino-based projects, the processor frequency is low. So it is not possible to display complex, high definition images and high-speed motions. Therefore, full-color TFT LCDs can only be used to display simple data and commands.

There are several components to achieve this. LEDs,  7-segments, Character and Graphic displays, and full-color TFT LCDs. The right component for your projects depends on the amount of data to be displayed, type of user interaction, and processor capacity.

TFT LCD is a variant of a liquid-crystal display (LCD) that uses thin-film-transistor (TFT) technology to improve image qualities such as addressability and contrast. A TFT LCD is an active matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven LCDs with a few segments.

In Arduino-based projects, the processor frequency is low. So it is not possible to display complex, high definition images and high-speed motions. Therefore, full-color TFT LCDs can only be used to display simple data and commands.

In electronics/computer hardware a display driver is usually a semiconductor integrated circuit (but may alternatively comprise a state machine made of discrete logic and other components) which provides an interface function between a microprocessor, microcontroller, ASIC or general-purpose peripheral interface and a particular type of display device, e.g. LCD, LED, OLED, ePaper, CRT, Vacuum fluorescent or Nixie.

The LCDs manufacturers use different drivers in their products. Some of them are more popular and some of them are very unknown. To run your display easily, you should use Arduino LCDs libraries and add them to your code. Otherwise running the display may be very difficult. There are many free libraries you can find on the internet but the important point about the libraries is their compatibility with the LCD’s driver. The driver of your LCD must be known by your library. In this article, we use the Adafruit GFX library and MCUFRIEND KBV library and example codes. You can download them from the following links.

Upload your image and download the converted file that the UTFT libraries can process. Now copy the hex code to Arduino IDE. x and y are locations of the image. sx and sy are size of the image.

while (a < b) { Serial.println(a); j = 80 * (sin(PI * a / 2000)); i = 80 * (cos(PI * a / 2000)); j2 = 50 * (sin(PI * a / 2000)); i2 = 50 * (cos(PI * a / 2000)); tft.drawLine(i2 + 235, j2 + 169, i + 235, j + 169, tft.color565(0, 255, 255)); tft.fillRect(200, 153, 75, 33, 0x0000); tft.setTextSize(3); tft.setTextColor(0xffff); if ((a/20)>99)

while (b < a) { j = 80 * (sin(PI * a / 2000)); i = 80 * (cos(PI * a / 2000)); j2 = 50 * (sin(PI * a / 2000)); i2 = 50 * (cos(PI * a / 2000)); tft.drawLine(i2 + 235, j2 + 169, i + 235, j + 169, tft.color565(0, 0, 0)); tft.fillRect(200, 153, 75, 33, 0x0000); tft.setTextSize(3); tft.setTextColor(0xffff); if ((a/20)>99)

I have to depend upon SPI due to pin count constrains on the uC chip. The project I have can work with 2.8" screen, which so far I have tried upon. I had a feeling that if I could manage to get a slightly bigger screen without adding up too much cost, would be perfect. But could not find a ready 3.2 or bigger LCD with SPI. Therefore I had floated my buying request to alibaba.com.

I got many offers for 3.2" LCDs but all of them were with 8/16/18 bit parallel interface. One manufacturer offered me this LCD. Which they have customized tooled to be used for SPI. They had some samples so they have sent me few samples to test it with.

3- The touch pad is there but with 4 analog output only. Touch controller is not included with this LCD. I had ordered few 2046 controller in the past so I have a plan to connect touch controller externally.

I am really happy to get in touch with you here. I know I got the right person for this problem to be resolved. I have gone through the previous threads on this forum and saw your contribution to the LCD related topics and libs.

This 2.8" screen works well but may be too small and too expensive (35€) as far as Chinese clones are concerned. So let"s configure a 3.2" TFT screen from Waveshare that can be found on Banggood for less than 15€.

The screen is the following: a 3.2" TFT LCD touchscreen display module for the Raspberry Pi B+, B, A+. Its resolution is the same as the 2.8": 320x240. It is in fact a Waveshare screen.

Get the files waveshare35a-overlay.dtb and waveshare32b-overlay.dtb for the WaveShare 3.2" 320x240 display and the WaveShare 3.5" 320x480 display respectively. For the new version 4.4 kernels, we need to rename the dtb files to dtbo files to match the new overlay tree name. Rename waveshare35a-overlay.dtb to waveshare35a.dtbo and waveshare32b-overlay.dtb to waveshare32b.dtbo and copy them to the /boot/overlays directory.

As described on this site, it is not recommended to use this screen for gaming. With twice as many pixels to push on the screen, the PiTFT 3.5" is significantly slower than its more compact brothers and we strongly advise against it for games. Now you know!

Get the files waveshare35a-overlay.dtb and waveshare32b-overlay.dtb for the WaveShare 3.2" 320x240 screen and the WaveShare 3.5" 320x480 screen respectively. For the new version 4.4 kernels, we need to rename the dtb files to dtbo files to match the new overlay tree name. Rename waveshare35a-overlay.dtb to waveshare35a.dtbo and waveshare32b-overlay.dtb to waveshare32b.dtbo and copy them to the /boot/overlays directory

In my humble opinion, if you have the 3.5" (C) LCD for Raspberry Pi (480x320; 125Mhz), it should work, but with the 3.5" (B) LCD for Raspberry Pi (480x320; IPS), you won"t be able to get 60fps!

The Raspberry Pi ecosystem is extremely versatile, with developers finding endless uses for the popular single-board computers (SBCs). One popular use for the Raspberry Pi is turning it into a retro games console, which is where something like the Adafruit Color TFT Bonnet comes in.

The Adafruit 1.3 " Color TFT Bonnet for Raspberry Pi to give it its full name, the extension board feature more than just a 1.3-inch colour IPS display. Adafruit has included a joystick and two pushbuttons too, with latter arranged like those in the Game Boy and Game Boy Color. The Adafruit does not include buttons that could be configured for Start and Select, though.

The IPS panel operates at 240 x 240 and can be controlled over SPI. According to the manufacturer, the board is compatible with all common Raspberry Pi variants, including the Pi Zero. There is also a Qwiic/STEMMA QT connector on the bottom of the board. Adafruit provides a kernel driver and Python library for the ST7789 chipset powering the board too.

The Adafruit 1.3 " Color TFT Bonnet costs US$17.50, with Adafruit offering bulk-buy discounts. The unit is out of stock for the time being, but the company will contact prospective buyers when it has produced another batch.