tft lcd interface with microcontroller price

The display is a critical component in every project, impacting the case, firmware, electrical design, user interface, and even battery life. For these reasons, and because it is the most visible component of your product, it must be approved by the mechanical design team, management and marketing.Before these teams can approve, they need to see it in action. But it can take days or weeks to connect a display to your platform, initialize it and build a code library able to create believable demonstrations. Meanwhile, the whole project is on hold.Our 8051 development kit / demonstration board can solve this problem. Use it to get the display seen, demonstrated and approved for your project.

ER-DBTM043-3 is a microcontroller 8051(80C51) demonstration and development kit for ER-TFTM043-3 product that is 4.3 inch tft lcd display with RA8875 controller board.The kit includes MCU board controlled by STC12LE5A60S2,ISP(In System Programming) with USB port and cable to customize the demonstration that includes your own bitmap images,personalized fonts,symbols,icons and burn sketches,microSD card that is written graphic and text into it,the power adaptor,the adaptor board with various pitch dimension used to connect MCU board and display.Optional for 8080 8/16-bit,6800 8/16-bit parallel interface and I2C,3-wire,4-wire serial interface.

The display is a critical component in every project, impacting the case, firmware, electrical design, user interface, and even battery life. For these reasons, and because it is the most visible component of your product, it must be approved by the mechanical design team, management and marketing.Before these teams can approve, they need to see it in action. But it can take days or weeks to connect a display to your platform, initialize it and build a code library able to create believable demonstrations. Meanwhile, the whole project is on hold.Our 8051 development kit / demonstration board can solve this problem. Use it to get the display seen, demonstrated and approved for your project.

ER-DBT035-6 is a microcontroller 8051(80C51) demonstration and development kit for ER-TFT035-6 product that is 3.5 inch tft lcd display with ILI9488 controller.The kit includes MCU board controlled by STC12LE5A60S2,ISP(In System Programming) with USB port and cable to customize the demonstration that includes your own bitmap images,personalized fonts,symbols,icons and burn sketches,microSD card that is written graphic and text into it,the power adaptor,the adaptor board with various pitch dimension used to connect MCU board and display.Optional for 8080 8-bit,8080 16-bit parallel interface and 3-wire,4-wire serial interface.

Displays have over time, emerged as one of the best ways to drive user interactions on any device. They make it easy to collect inputs and present information (outputs) to users in a graphical, easy to understand format. This usefulness has led to improvements in their quality, with improved resolution and low power features, but almost little has changed when it comes to the complexity of creating beautiful user interfaces for them. This is why the team at STONE Tech created the STVC035WT-01 intelligent Smart display which we will explore for today’s tutorial.

The STONE STVC035WT-01 display is a 16-bit, 3.5″ display with a 320×480 (RGB) resolution, has a 49.0 x 73.4mm viewing area, and pixel spacing of 0.1905mm×0.0635mm (H×V). The display is a Class A industry Panel with an Industry level 4 wire resistance based touch screen, all layered on an integrated CPU, driver, and flash memory with several communication interfaces to enable it to connect to data sources like microcontrollers. For communication with a microcontroller, the display supports serial communication protocols likeUART/TTL, RS232, and RS485, ensuring it can communicate with any kind of microcontroller or industrial computers. The UART/TTL pin on the Display supports both 3.3v/5v logic level which adds another layer of ease to the use of the display as users need not worry about the need for logic level shifters when building using a microcontroller that operates on either of the voltage level mentioned.

One of the major benefits of using this display is its compatibility with the STONE TOOL GUI Designer which allows the development of User Interfaces in a fast and easy manner.

To demonstrate the capabilities of the display, we will build a heart rate monitor using an Arduino Uno with the MAX30100 pulse oximetry and heart rate sensor. The Arduino will serve as the brain of the project and perform the simple task of obtaining the heart rate and blood oxygen data from the MAX30100, displaying it on the screen.

At the end of this tutorial, you would know how to interface Arduino boards with the STONETech displays, and also how to interface sensors like the MAX30100 with the Arduino.

Our development process for today’s project will follow this outline. We will first create the GUI for the project after which we will proceed to write the firmware to interface the microcontroller with the display.

There are two major ways of creating a GUI. One is to create the GUI using only the elements (buttons, text boxes, etc) that are available within the GUI Design tool, while the second is to create a mockup image using image editing tools like Photoshop/Paint.NET, import the image into the GUI Desing tool software and place the GUI design elements on the image. For this tutorial, we will go with the second option as it allows more flexibility and gives room for the development of truly beautiful GUIs.

The design is quite simple, we illustrate label elements to hold the date, the project title, and the values from the microcontroller. The values from the microcontroller include; the status of the connection between the microcontroller and the display, the heart rate, and the oxygen levels.

With the GUI Image done, we then proceed to import it into the STONE TECH GUI tool. This obviously mean we need to install the STONE TOOL first, so head over to the STONE Tool GUI Designer page and download it. The STONE TOOL software requires no installation and it can be directly opened and run by decompression on your computer.

It should be noted that while compatibility with other OS is currently being considered, the current version of the software only supports Windows 8 and 10 operating systems.

1. With the software downloaded on your computer, launch it and go to File>New Project. This will launch the “New Project dialog box ” where you will be expected to fill in the details of your display, set the storage path, and the name of your project. Since we will use the STVC035WT-01 display which has a  resolution of 320*480 and a default flash space size of 128Mbyte (expandable to 1024MByte), I have entered its details as shown in the image below. If you are using any of the other StoneTech displays, you will need to enter the details of that display instead.

2. Next, on the left side of your screen, you will see the project tree (under the project window) with its assets. Expand the Picture file, and delete the 0.jpg image inside it by right-clicking on it, and selecting “Remove”. For every new project, the 0.jpg file is always created as the default background for your UI, since we will use our background (the one we designed with photoshop), we can delete it.

3. Next, we need to add the background we designed with photoshop into the picture file. Right-Click on the “Picture” directory and select “Add”. This will open a dialog box for you to navigate to where the JPG version of our photoshop images is stored.

4. Next, we add fonts to the project’s assets to determine how texts appear on the display. Right-click the “Font” file, and select the appropriate font to add to the project. For this tutorial, we will use the ASCII 24 by 48 font. With that done we are now ready to begin adding the GUI elements.

7. With all of these done, we compile the GUI and upload it to the screen. To do this, click on button 1 in the image below to Compile the GUI design and click on button 2 to upload the GUI to your display.

Uploading the GUI display requires you either connect the display directly to your computer or you put the GUI on a flash drive and plug the flash drive into the USB port of the display. Because of the little complexity associated with the second option, we will be going with it.

Plug the USB flash drive into the computer then click the “Download to u-disk” button on the STONE GUI TOOL.With the “download to u-disk” process complete, pull out the USB flash disk, insert it into the USB interface of the display module and wait for the completion of the upgrade. When the upgrade is completed, there will be a prompt sound.

The model of the STONE display being used for this tutorial communicates via RS232, as such, to be able to interface the display with the Arduino, we have to connect it through a MAX3232 chip. This extra requirement can be avoided by using one of the STONE displays with a TTL interface.

Go over the connections once again to be sure everything is properly connected. With this done we can now proceed to the Arduino code to send commands and data to the LCD.

Due to the simplicity embedded in the design of STONETECH displays, the microcontroller’s interaction with any of the GUI components is usually via the “memory address” of each component. for instance, to send a message to the display from the microcontroller (the Arduino in this case), the message has to be published to the memory address of the GUI Component (in this case, the text-display component). The same holds for GUI Components that are meant to send data to the microcontroller, as the microcontroller has to poll their memory address to obtain information from them. As a result of these, we need to obtain the memory address of all the GUI components before proceeding. For each GUI component, the memory address is usually listed among the properties of the component, under the property toolbar, at the right-hand side of the STONE TOOL interface.

With this obtained, we can now proceed to write the code for the project. One of the good things about using the STONETech displays is the fact that you don’t need a library to write code for them because of their simplicity, but since we will use serial communication, we will use the software serial library to avoid having to use the hardware serial port on the Arduino Uno. To interface with the MAX30100, we will also need to install the MAX30100 library. The Max30100 library can be installed using the Arduino Library Manager or by downloading it from the attached link and installing manually by extracting the file, copying its content and pasting it in the Arduino libraries folder. The software serial library comes pre-installed with the Arduino IDE.

>With the libraries installed, we now have all we need to write the Arduino Code. As usual, I will do a brief explanation and attach the complete version of the code under the download section.

Next, we provide the customized commands that will be sent to the screen to store data in the memory address. The commands are the same for all the elements with the only difference being the memory address.

Next, we specify the variables; Reporting_Period_MS and tsLastReport, which will be used to determine when the sensor should be refreshed. With this done, we then move to the void setup() function.

We start the function by initializing serial communications between the screen and the microcontroller setting the baud rate to 115200. We also initialize hardware serial communication so we can use the serial monitor on the Arduino IDE for debugging purposes.

To wrap up the void setup() function, we increase the current of the IR LED on the Max30100 beyond the default 50mA. With this done, we move to the void loop() function.

With the code complete, connect your Arduino board to your computer and upload the code to your setup. Place a finger on the Max30100 and after a while, you should see the live pulse rate and oxygen levels appear on the display as shown in the image below.

While this project only demonstrates less than 35% of the capabilities of the STONE TECH display, it provides a good foundation for you to build amazing projects. As an engineer, the key benefit of the display to me is the ease of use both in the creation of the GUI and also the development of the code to tie it together with a microcontroller. The fact that the display doesn’t require any library makes it perfect for use with any language and any microcontroller with serial port access.

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In today"s world, almost every application is equipped with fancy user interface. Most of these interfaces are based on TFT LCD displays with a touch controller. At ST, we are committed to using our technologies and expertise to help our customers make their creations more attractive.

Engineers who would like to lower production costs by using an STM32 microcontroller with an embedded TFT LCD controller or a less-expensive TFT LCD display without a controller

Prerequisites You need to have a good understanding of connected systems and be familiar with STM32 microcontrollers and their development environment.

The SparkFun TFT LCD Breakout is a versatile, colorful, and easy way to experiment with graphics or create a user interface for your project. With a 4-wire SPI interface and microSD card holder, you can use this breakout to easily add visual display/interface capabilities to a project as well as providing all the storage you might need for multimedia files.

To get started with this breakout, you will need an Arduino compatible microcontroller of your choice - we recommend something with extra RAM like the SparkFun Thing Plus. The breakout can be powered with either 5V or 3.3V. The microSD card holder is connected to the same SPI bus as the display which keeps the required pin count low and exists to relieve the burden from your microcontroller"s poor memory due to having to store hundreds of images of cats, or really whatever you want to keep there. We have also gone ahead and tricked out the SparkFun HyperDisplay library with a driver made especially for this breakout!

Out of the box, the SparkFun TFT LCD Breakout will come with a large backing PCB that makes it easy to securely mount the display in a project. If you need a more flexible solution you can remove the display module, snap off half the backing board, and then re-insert the display module. When this is done you"ll be left with the bare minimum frame around the display to more seamlessly integrate with your project.

The ST7789 TFT is a color display that uses SPI protocol. This display is an IPS display, it comes in different sizes (1.3″, 1.54″ …) but all of them should have the same resolution of 240×240 pixel.

The ST7789 TFT display works with 3.3V only (power supply and control lines). The display module is supplied with 3.3V that comes from the AMS1117 3V3 voltage regulator, this regulator steps down the 5V into 3.3V (supplies the display controller with regulated 3V3).

To connect the PIC18F46K22 with the display module, I used voltage divider for each line. This means there are 4 voltage dividers. Each voltage divider consists of 2.2k and 3.3k resistors, this drops the 5V into 3V which is sufficient.

If the display module has a CS pin (Chip Select) then it should be connected to the PIC18F46K22 microcontroller through another voltage divider (for example connecting it to pin RD2).

In this project SPI1 module is used with SCK1 on pin RC3 (#18) and SDO1 (MOSI) on pin RC5 (#24). SCK1 and SDO1 pins of the PIC18F46K22 MCU are respectively connected to SCL and SDA pins of the ST7789 display module.

The default connection setting of the mikroC ST7789 TFT library is hardware SPI1 module (SPI1 module must be initialized before initiating the display). Instead of hardware SPI1 module, software SPI or hardware SPI2 module can be used.

If TFT data pin (TFT_DIN) and clock pin (TFT_SCK) are defined in the main code (before #include “ST7789.c”) then the library will automatically use software SPI.

If the display module has a CS pin uncomment its related lines (#define TFT_CS and #define TFT_CS_DIR) and connect it to RD2 pin of the microcontroller through voltage divider.

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TouchGFX is a unique software framework that unlocks the graphical user interface (GUI) performance of your low-resource hardware. The revolutionizing technology breaks existing restraints, as it lets you create sophisticated GUIs that fully live up to today’s smartphone standards at a fraction of the cost.

emWin is designed to provide an efficient, processor- and LCD controller-independent graphical user interface (GUI) for any application that operates with a graphical LCD. It is compatible with single-task and multitask environments, with a proprietary operating system or with any commercial RTOS. emWin is shipped as “C” source code. It may be adapted to any size physical and virtual display with any LCD controller and CPU.

Micrium is a global RTOS leader and a top choice of embedded engineers building microprocessor, microcontroller, and DSP-based devices. Micrium’s commercial RTOS components such as the μC/OS product family are the preferred solution at thousands of companies around the globe. Offering unprecedented ease-of-use, μC/OS-III is delivered with complete 100% ANSI C source code and in-depth documentation. μC/OS-III runs on the largest number of processor architectures, with ports available for download from the Micrium Web site. µC/OS-III allows for unlimited tasks, semaphores, mutexes, event flags, message queues, timers and memory partitions. µC/OS-III provides features to allow stack growth of tasks to be monitored. µC/OS-III also supports an unlimited number of priority levels. µC/OS-III’s footprint can also be scaled to contain only the features required for a specific application.

Crank™ Software Inc. is an innovator in embedded user interface (UI) solutions. Compared to traditional electronic design automation tools, Crank’s products and services enable R&D teams to more quickly develop rich graphical displays—also called UIs or HMIs—for resource-constrained embedded devices. Applications include in-car graphical displays, animated GPS systems, and rich user interfaces on factory floors. Crank Software bridges the gap between UI design and embedded systems to deliver competitive advantage because streamlining the development lifecycle enables their customers to get products to market faster, with higher ROI and lower TCO, while delivering a superior customer experience. Crank Storyboard™ Designer enables user interface (UI) designers to easily prototype the look and feel of a product, and then deploy a production-ready interface directly to the embedded target. Designers maintain full control over the UI and user experience (UX) without having to perform a hand off to an embedded systems engineer for implementation.

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