adafruit 5.0 40 pin tft display quotation

I have an Adafruit 2.4" TFT with resistive touchscreen using an Arduino Nano 33 BLE and I"m having problems. The touch screen keeps randomly triggering. I thought it might be the touch threshold, but that didn"t help. Then I discovered that there is a strange pulsing on the resistive lines. This is what X- looks like:

I thought that maybe it was crosstalk, but it doesn"t match any of the signals on any other pin. "X-" is the worst one, but it is present to some degree on all four pins. I tried turning off the BLE radio and that didn"t seem to help either.

Displays are one of the best ways to provide feedback to users of a particular device or project and often the bigger the display, the better. For today’s tutorial, we will look on how to use the relatively big, low cost, ILI9481 based, 3.5″ Color TFT display with Arduino.

This 3.5″ color TFT display as mentioned above, is based on the ILI9481 TFT display driver. The module offers a resolution of 480×320 pixels and comes with an SD card slot through which an SD card loaded with graphics and UI can be attached to the display. The module is also pre-soldered with pins for easy mount (like a shield) on either of the Arduino Mega and Uno, which is nice since there are not many big TFT displays that work with the Arduino Uno.

One of the good things about this module is the ease with which it can be connected to either of the Arduino Mega or Uno. For this tutorial, we will use the Arduino Uno, since the module comes as a shield with pins soldered to match the Uno’s pinout. All we need to do is snap it onto the top of the Arduino Uno as shown in the image below, thus no wiring required.

This ease of using the module mentioned above is, however, one of the few downsides of the display. If we do not use the attached SD card slot, we will be left with 6 digital and one analog pin as the module use the majority of the Arduino pins. When we use the SD card part of the display, we will be left with just 2 digital and one analog pin which at times limits the kind of project in which we can use this display. This is one of the reasons while the compatibility of this display with the Arduino Mega is such a good news, as the “Mega” offers more digital and analog pins to work with, so when you need extra pins, and size is not an issue, use the Mega.

To easily write code to use this display, we will use the GFX and TFT LCD libraries from “Adafruit” which can be downloaded here. With the library installed we can easily navigate through the examples that come with it and upload them to our setup to see the display in action. By studying these examples, one could easily learn how to use this display. However, I have compiled some of the most important functions for the display of text and graphics into an Arduino sketch for the sake of this tutorial. The complete sketch is attached in a zip file under the download section of this tutorial.

As usual, we will do a quick run through of the code and we start by including the libraries which we will use for the project, in this case, the Adafruit GFX and TFT LCD libraries.

With this done, the Void Setup() function is next. We start the function by issuing atft.reset() command to reset the LCD to default configurations. Next, we specify the type of the LCD we are using via the LCD.begin function and set the rotation of the TFT as desired. We proceed to fill the screen with different colors and display different kind of text using diverse color (via the tft.SetTextColor() function) and font size (via the tft.setTextSize() function).

Next is the void loop() function. Here we basically create a UI to display the youtube subscribe button, using some of the same functions we used under the void setup() function.

The Adafruit library helps reduce the amount of work one needs to do while developing the code for this display, leaving the quality of the user interface to the limitations of the creativity and imagination of the person writing the code.

ER-TFTM050-3 is 800x480 dots 5" color tft lcd module display with RA8875 controller board,superior display quality,super wide viewing angle and easily controlled by MCU such as 8051, PIC, AVR, ARDUINO,and ARM .It can be used in any embedded systems,industrial device,security and hand-held equipment which requires display in high quality and colorful image.

It supports 8080 6800 8-bit,16-bit parallel,3-wire,4-wire,I2C serial spi interface. Built-in MicroSD card slot. It"s optional for 4-wire resistive touch panel (IC RA8875 built-in touch controller),capacitive touch panel with controller,font chip, flash chip and microsd card. We offer two types connection,one is pin header and the another is ZIF connector with flat cable.Mounting on board by default. There is no capacitive touch panel connection on the board of ER-TFTM050-3,its capacitive touch panel needs to be connected with your external board.Now we design another new board with capacitive touch connection named_ER-TFTM050A2-3.

Of course, we wouldn"t just leave you with a datasheet and a "good luck!".Here is the link for5" TFT capacitive touch shield with libraries,examples,schematic diagram for Arduino Due,Mega 2560 and Uno. For 8051 microcontroller user,we prepared the detailed tutorial such as interfacing, demo code and development kit at the bottom of this page.

RAiO RA8875 Character/Graphic TFT LCD Controller Specification Version 1.9 October 16, 2014 RAiO Technology Inc. Copyright RAiO Technology Inc. 2011, 2012, 2013, 2014 RAiO TECHNOLOGY INC. 1/178 www.raio.com.tw RA8875 Version 1.9 Character / Graphic TFT LCD Controller Update History Version Date Description 1.0 May 10, 2011 Preliminary Version Remove Serial Flash Address 32 bit Mode 1. Modify REG 05h 2. Remove REG B3h June 15, 2011 3. Modify REG E1h 4. Modify Section 7-10-1 : DMA In Continuous Mode 5. Modify Section 7-10-2 : DMA In Block Mode 1.1 June 27, 2011 1. Modify REG 16h REG 89h REG F0h 1. Modify Figure 7-80Figure 7-81 October 4, 2011 1. Modify Section 7-4-2 November 18, 2011 2. Modify Table 8-2 1. Add Figure 7-82 November 29, 2011 2. Modify Figure 6-41 1.2 January 10, 2012 1. Modify Section 7-6 BTE Function (Parallel MCU interface only) February 10, 2012 1. Add Appendix A February 22, 2012 1. Modify REG 21h 1.3 1. Modify Section 4-8 : pin description of OSC VDD March 16, 2012 2. Modify Section 6-1-2 : Serial I/F Protocol 3. Add Note of REG 94h , REG 98h , Figure 7-29, Figure 7-30 1. Modify Section 5-2 : the Bit 1 of REG 01h May 15, 2012 2. Modify Table 7-8 1.4 1. Modify Section 4-1 : pin description of PS March 27, 2013 2. Modify Section 5-2 : REG 01h REG 16h 3. Add Section 6-1-2-3 :SPI Sleep/Wake Up 1. Modify Section 6-1-2-1 : 3-Wire SPI Interface 1.5 May 3, 2013 2. Modify Section 6-1-2-2 : 4-Wire SPI Interface June 18, 2013 1. Modify Figure 6- 12Figure 6-18 July 17, 2013 1. Modify Section 6-8 : Example of formula for system clock 1.6 July 31, 2013 1. Modify Section 5-2 : REG 15h 1.7 December 03, 2013 1. Modify Figure 6 -37~Figure 6-40Figure 6-48 1.8 March 7, 2014 1. Modify Section 7-2-4 and Section 5-5 :REG 41h May 29, 2014 1. Add Note 3 of Table 8-2 1.9 August 11, 2014 1. Modify Section 4-3: PDAT 15:0 October 16, 2014 1. Modify Table 7-23 & Table 7-24 RAiO TECHNOLOGY INC. 2/178 www.raio.com.tw

TFT color display with 160 x 80 pixel resolution and 0.96 inch diagonal. The SPI interface is used to communicate with the display. The module also contains a microSD card slot on which to display graphics. Thanks to the built-in 3.3 V voltage stabilizer, the module is compatible with both 3.3 V and 5 V logic. It can be connected to most starter sets with microcontrollers as well as microprocessors. It has a white LED backlight PWM signal control. The module has support in the form of the Adafruit GFX library .

This 5.0" TFT screen has lots of pixels, 800x480 to be exact, and an LED backlight. Its great for when you need a lot of space for graphics. These screens are commonly seen in consumer electronics, such as miniature TV"s, GPS"s, handheld games car displays, etc. A 40-pin connector has 8 red, 8 green, and 8 blue parallel pins, for 24-bit colour capability.