adafruit 1.8 color tft lcd quotation

I recently purchased the 1.8" TFT Shield with MicroSD Card (ID 802) assembled the connectors, plugged it into my Arduino UNO and tried to run the "graphicstest" script from the Adafruit Library as described on Adafruit.com, but the screen remained black. However, if I push the Reset button on the Shield at the right time, it displays the color screen test that is active at the time. This shield is marked as Adafruit Seesaw compatible which controls the 5-Way Nav + 3 Buttons and Backlight. I run the test in the SPI mode (Fast method) as directed in the test script. The script uses Pin 9 for TFT_RST which does not work. I also set the #define TFT_RST -1 as directed in the comment, but it still does not turn on the Backlight. I put extra delays in the test script and Serial.println"s at each test so I can push the TFT_RST button in order to see the individual test displays turn on. At each test the results were positive, so the TFT is working but no Backlight. I"ve checked the soldering. It is good. I found in another post on this Forum that some of the TFT boards had problems with the Reset pin and Seesaw was supposed to fix it. Is my board bad or is there a problem with the test script? The ID numbers on the back of my TFT Shield is E336755, GC-2, 94V-0. The board is also marked as seesaw. Don"t know if this info helps. How can I turn on the Backlight? Do I have to pull down/up Pin 9?

I think your issue is that Seesaw needs to turn on the backlight. Take note there is a bug in the SD card portion of the example, a command is missing to make the image appear. If I remember correctly, you need to clear the screen or do a color fill before entering the SD part of the code. Add that and the image will appear.

Hopefully Adafruit will soon find time to update the tutorial and document the Seesaw backlight function. I couldn"t figure how to use it looking at the library. A few comments are missing ;-)

The error is in tft.pushColor.... which I changed to a lower case "c"..... tftpushcolor.... to get it to compile. When I run the script, it fails to pass the first lines in setup(). So I put Serial.print"s in setup and in the Libraries to debug the failure. Here are snippets of my Debug code and the outputs:

This failure acts like it could not read the register. Either the code is using the wrong register address or the hardware is bad. Notice that the seesaw addr = 2E which in file Adafruit_TFTShield18.h is #define TFTSHIELD_ADDR 0x2E. I"m not sure if this is the proper address since in file Adafruit_seesaw.h the seesaw addr is #define SEESAW_HW_ID_CODE0x55.

So, is there a bug in the Libraries or is my hardware bad? I run this on an Arduino UNO with the TFT shield plugged into the UNO"s headers. No other wiring is used. I expected the boards to run stacked directly. Am I doing something wrong? I examined the Shield to see if it has a Seesaw chip on-board and it does appear so. All soldering seems good. And as I explained in my first Post, I can see the image display show if I push and hold down the Reset button. In any event there is at least one bug in the shieldtest.ino file.

Sorry, I can"t post a photo. It is too large. However, the backside of the TFTShield does say it uses Seesaw. There is also no other hardware connections. The Shield is plugged on top of the UNO. On the top side of the Shield it is marked as 1.8" TFTShield followed by a letter B in a circle. I don"t know if this is a version number. I think there are two different drivers as indicated in the File: Adafruit_ST7735.h ...... Subclass of ST77XX type display for ST7735B and ST7735R TFT Drivers.

The chip on the Shield is an Atmel ATSAMD09U. I need to get the Spec Sheet on this device to understand how it is initialized. I have experience with low level hardware programming. Maybe I can discover what is wrong with the setup code. I"ll to investigate this and Post my results, if any. I apparently have one of the new TFTShields which still may need more development.

For me, the BMP would not display without it. My example still includes some debugging code, but I confirm this code DID work on my rev "B" 1.8" TFT shield PN#802. Yes, the "B" in a circle is the board revision!

For me, the BMP would not display without it. My example still includes some debugging code, but I confirm this code DID work on my rev "B" 1.8" TFT shield PN#802. Yes, the "B" in a circle is the board revision!

I soldered the connectors to the TFTShield as directed on the Adafruit site. It showed that the 2 pins closest to the USB and Power Jack should be unconnected. That caused SCL/SDA pads to not be connected between the UNO and the Shield. This could be the problem. If these pins need to be controlled from the UNO, then the data Bus will be open therefore returning 0xFF for the HW_ID. I"ll connect these pins and see what happens. The attached photo shows the missing pin contacts from the bottom side of the TFTShield. You may be on track. Thanks!

See attached photo below in this thread. Martin has suggested that I connect the UNO"s SCL/SDA pins to the TFTShield. I need to know from you if this is correct. I don"t want to falsely connect any outpins together and damage the hardware. Please let me know if I should have connected these pins. The Adafruit site did not indicate that these pins should be connected via the pin connectors. It said to cut 2 connectors as 6 pins and 2 more as 8 pins, thus leaving the 2 pins on each side connectors nearest the USB and Power Plug unconnected (i.e. open). I"ll wait your reply before making this change.

I soldered the connectors to the TFTShield as directed on the Adafruit site. It showed that the 2 pins closest to the USB and Power Jack should be unconnected. That caused SCL/SDA pads to not be connected between the UNO and the Shield. This could be the problem. If these pins need to be controlled from the UNO, then the data Bus will be open therefore returning 0xFF for the HW_ID. I"ll connect these pins and see what happens. The attached photo shows the missing pin contacts from the bottom side of the TFTShield. You may be on track. Thanks!

I added the extra 2 pin connectors to both sides of the TFTShield and got the Buttons, Joystick, and the display working, but I can"t load the parrot.bmp image ("File not found"). This may be due to the fact that my MicroSD card is formatted for Raspberry Pi Linux. I need to get a standard FAT MicroSD and try it. If it too has problems, I"ll work on debugging the SD Library. I know that the LCD display works, because I can run the Non-Seesaw shieldtest from the Adafruit_ST7735 Library and get the parrot.bmp image to display as long as I hold down the reset pin to turn on the Backlight.

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.

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.

All the functions called under the void setup function, perform different functions, some draw lines, some, boxes and text with different font, color and size and they can all be edited to do what your project needs.

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.

Enjoy an impressive colour display and more with this wonderful little shield. It’s a simple way to build on your Arduino project by adding a micro-SD card slot, joystick and small screen. The 1.8″ display may be small, but it boasts 128 x 160 colour pixels and is a true TFT, offering 18-bit colour (262144 shades).

The 1.8" display has 128x160 color pixels. The TFT driver (ST7735) can display full 18-bit color. The breakout has the TFT display soldered on (it uses a delicate flex-circuit connector)

In the above example, Node32-Lite and this 1.8-inch LCD.  Please refer to the tutorial here: ST7735S interfacing with ESP32 to make the connections, Arduino library installation, and modification needed for it to works on this LCD.

Spice up your Arduino project with a beautiful small display shield . This TFT display is small (1.8" diagonal) bright (4pcs white-LED chips) and colorful (18-bit 262,000 different shades)! 128x160 pixels with individual pixel control.

It defaults to 12 MHz. Most of those LCDs can actually run faster. This copy added a setBitrate() function, so you can easily change the speed. Just use mylcd.setBitrate(24000000);

This copy also has native SPI manipulation for the CS and RS pins by the SPI port, if you connect those signals to CS pins supported by SPI. The recommended connection is CS on pin 10 and RS on pin 9. The native CS+RS support makes an incredible speedup on this LCD.

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TFT displays are full color LCDs providing bright, vivid colors with the ability to show quick animations, complex graphics, and custom fonts with different touchscreen options. Available in industry standard sizes and resolutions. These displays come as standard, premium MVA, sunlight readable, or IPS display types with a variety of interface options including HDMI, SPI and LVDS. Our line of TFT modules include a custom PCB that support HDMI interface, audio support or HMI solutions with on-board FTDI Embedded Video Engine (EVE2).

This lovely little display breakout is the best way to add a small, colorful and bright display to any project. Since the display uses 4-wire SPI to communicate and has its own pixel-addressable frame buffer, it can be used with every kind of microcontroller. Even a very small one with low memory and few pins available!

The 1.8" display has 128x160 color pixels. Unlike the low cost "Nokia 6110" and similar LCD displays, which are CSTN type and thus have poor color and slow refresh, this display is a true TFT! The TFT driver (ST7735R) can display full 18-bit color (262,144 shades!). And the LCD will always come with the same driver chip so there"s no worries that your code will not work from one to the other.

The breakout has the TFT display soldered on (it uses a delicate flex-circuit connector) as well as a ultra-low-dropout 3.3V regulator and a 3/5V level shifter so you can use it with 3.3V or 5V power and logic. We also had a little space so we placed a microSD card holder so you can easily load full color bitmaps from a FAT16/FAT32 formatted microSD card. The microSD card is not included.