spi lcd module lcd12864 supplier

This is a monochome LCD display driver used in 128 x 64 and 132 x 64 LCD displays. The LCDs are available (pre-mounted on PCBs) relatively cheaply from via various suppliers online.

You can use hardware SPI for SCK and SDA, but on small monochome displays there is so little data transferred that using software SPI won"t hurt, and gives you more flexibility about the pins that you use.

For 132 x 64 displays, you"ll need to specify the width as an option or you"ll end up with 4 columns of random pixels: var g = require("ST7565").connect({spi:spi, dc:A7, cs:A5, rst:A6, width: 132}, function() { ... })

The function of the program: use the software image2lcd.exe to extract the bitmap of one image and display it on the centre part of the 2.2”screen(note: for the reason of UNO’s internal memory, the following demo cannot be accepted on UNO since the image file is too large, but it can be displayed on ESP32. So you’d better choose small image file if you want to display it on UNO. ) The parameter selection of the software is provided below.

ST7920 is a so-called LCD which stands for Liquid Crystal Display. This screen is made up of segments that can be turned on or off. These segments are placed as an "8" in some screens like a digital clock, in others as pixels.

With LCD it looks like the boxes can become black. Technically this is not true. The light is transmitted differently making it appear black. More details on Wikipedia

The next step is to provide 5V to the LCD. To do this, we use the "Vcc" and "GND" pins on the far right of the display. Connect these to the + rail and- rail on the breadboard.

Now we have to tell the display how we are going to provide the data. We are going to use the SPI (Serial Peripheral Interface) protocol. The name already reaveals it a bit, the data is serial. With the PSB pin we can set the data transfer mode.

This 128x64 graphic LCD display module (CFAG12864T2-TFH) is thin, light, low-power, and LED backlit. This display is visible in all lighting situations, from darkness, normal office lighting, and up to bright sunlight, making it an excellent sunlight/daylight readable LCD solution.

This graphic LCD is a transflective, positive-mode display, the backlight may be turned off when there is sufficient ambient light to read the display. Turning the backlight off will further reduce the already low power consumption. This display is well suited for compact hand-held devices, or any application where a lot of display in a very small area is needed.

This LCD display has an integrated controller and voltage generating components mounted on the flexible tail. The tail connects to a standard 18-conductor 0.5mm pitch ZIF (Zero Insertion Force) connector:Typical top contact: TE Connectivity 1-1734839-8 (DigiKey P/N A100297TR-ND)

In this project, I will show you how to interface a 128X64 Graphical LCD with Arduino UNO. This particular LCD Module is based ST7920 LCD Controller. So, we will first see a little bit about the Graphical LCD Module and its LCD Controller ST7920.

In the previous Arduino project, I have interfaced a Nokia 5110 LCD Module with Arduino. It is also a graphical LCD which can display some basic bitmap images and graphics. But the issue with Nokia 5110 LCD Module is its resolution.

At 84 x 48 pixels, the Nokia 5110 LCD can be used for implementing a menu-based user interface. Due to its small size, the resulting menu will be limited to 3 or 4 items per page.

If we want a bigger display with more real estate to work with, then the obvious choice is to go for the bigger and better 128×64 Graphical LCD Module.

As a demonstration, after making all the hardware connections, I will display a bitmap image on the Graphical LCD Module. If you are interested in implementing a simple 16×2 Alpha-Numeric LCD with Arduino, then check out this tutorial.

At first glance, the 128×64 Graphical LCD Module seems like a bigger brother to the famous 16×2 LCD or 20×4 LCD Modules, with their similar construction and almost similar pin layout.

But there is a significant difference between those two. 16×2 or 20×4 LCDs are essentially character displays. They can only display alpha-numeric characters and some simple custom characters that are confined to a 5×8 matrix.

By using different combinations of pixels, we can basically display characters of various sizes. But the magic doesn’t end there. You can display images and graphics (small animations) as well. In a 128×64 LCD Module, there are 64 rows and 128 columns.

There are several versions of the Graphical LCD in the market. Even though the usage, application and implementations are almost identical, the main difference lies in the internal LCD Controller used to drive the dot matrix display.

Some of the commonly used LCD Controllers are KS0108, SSD1306, ST7920, SH1106, SSD1322, etc. The pin out of the final LCD Module might vary depending on the LCD Controller used. So, please verify the LCD Controller as well as the pin out before making a purchase.

The Graphical LCD Module I purchased consists of ST7920 Controller. It is manufactured by Sitronix and supports three types of bus interfaces i.e., 8-bit mode, 4-bit mode and Serial interface.

If you have used 16×2 LCD Display earlier, then you might be familiar with both 4-bit as well as 8-bit parallel interfaces. The serial interface is something new and we will explore this option in this project.

As I already mentioned, double-check with the manufacturer about the pinout of the Graphical LCD Module. The following table describes the pinout of the 128×64 LCD Module that I have.

Now that we have seen a little bit about the Graphical LCD and its controller ST7920, let us now proceed with interfacing the 128×64 Graphical LCD with Arduino. I will implement a simple circuit to demonstrate how easy it is to interface the LCD and Arduino using very few external components.

So, connect the RS, RW and E of the LCD to Digital IO pins 10, 11 and 13 of Arduino UNO. Also, in order to select the Serial Interface Mode, the PCB pin must be connected to GND.

The remaining connections are similar to a traditional 16×2 LCD. VCC and GND are connected to 5V and ground of the power supply. VO is connected to the wiper of a 10KΩ POT while the other two terminals of the POT are connected to 5V and GND respectively.

I have used the above “The Office” logo. Remember that the resolution of the 128×64 LCD is, well 128×64 pixels. So, the maximum image size should be 128×64. So, using Microsoft Paint, I have brought down the resolution of the above image to 128×64 pixels and also saved it as Monochrome Bitmap Image.

A simple project for interfacing the 128×64 Graphical LCD with Arduino is implemented here. Instead of displaying plain characters, I have displayed a bitmap image on the LCD to show its capability.

Depending on the vendor you may find boards using an ST7920 IC Driver or a ST7565 IC Driver. Boards using a DOG-M128 Display use a ST7565 IC Driver. The more common and generic boards use some flavor of a 12864 LCD with the ST7920, this is the case with most board you find in online stores.

This display board is supported by the most popular 3D Printer firmwares, yet differences in the LCD Drivers used and others may dictate the level of support in a given 3D printer mainboard and firmware combination. See connection for more details.

The original design supports the 8bit Parallel interface and a 4bit serial interface. Many clones or variants only support the serial (SPI) interface.

Depending on the vendor you may find boards using an ST7920 IC Driver, a ST7565 IC Driver, or other. Boards using a DOG-M128 Display use a ST7565 IC Driver. The more common and generic boards use some flavor of a 12864 LCD with the ST7920, this is the case with most boards you find in online stores.

Clones and other manufactures may provide different connections, in particular models without SD-Card or models supporting only the SPI/Serial interface (most common)

The basic requirement to add support in the Marlin Firmware is to enable the REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER in the "Configuration.h”. For more details check Marlin"s page on how to configure the firmware, see the LCD section.

The firmware also offers other define constants for some popular variants of the "RepRapDiscount Full Graphic Smart Controller", that may use another driver or has a different PIN/layout or other requirement. Look at options under the the "LCD / Controller Selection" sections in the "Configuration.h” file.

To enable the correct LCD in the firmware it is important that you identify if your version of a "Smart Controller" is indeed using the ST7920 driver or if it has a different pin requirement. If that is your situation, then you need to see if the firmware already has support for your version of "Smart Controller" and select it accordingly.

Another important aspect of compatibility is dictated by your printers mainboard it self. If you board has a dedicated LCD connector you have to check at minimum two things:

For example a connection that shares the SPI with the an ST7920 LCD will not work and will produce garbage on the LCD. (The ST7920 can not share an SPI/Serial interface).