GLCD DATASHEET PDF

In this article, we are discussing the implementation of different instructions. Instructions in KS Controllers KS controllers have seven instructions, they are given in the following table. The enable pin works as a clock for the GLCD. During write instructions, after setting each pin of the corresponding value, enable pin must be applied with a high to low pulse. The data will be latched at the falling edge of the E. For reading instructions, data appears while E is at a high level.

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GLCD has external voltage double pins, which can double the voltage up to 7V. It supports both serial and parallel communication methods. Most of the calculator uses the ST controller display. Each pixel is made up of 5 small layers. The outer most layer is known as the protection layers. The other three-layer make each pixel on the LCD Screen. The inner layer two layers make the sandwich of liquid crystals. The layers have polarized path opposite each other.

The polarized layers also act as anode and cathode. When the power applies to the polarized layers then the crystal changes their direction and lets the backlight go through itself. Each pixel will control by the driver ST The rest of the pins connects with the pixels in the form of row and column. The output pins are X64 in numbers and they control every pixel.

The driver has internal registers, which act as data and instructions registers. Therefore, the input pins will help to control the resister and these pins will make the data display on the GLCD.

The data registers get fill and then show the data. To replace the data on the screen the data register needs to replace with new data. So always clear the LCD the previous data before replacing the new data. The command registers are also needed to replace the data but only the opposite in functions with each other.

We can interface it with microcontrollers with two methods. The first method is using parallel pins and the second pins are serial communication pins. Arduino uses the following circuit to operate serially. For Serial only the following pin needs to describe in the Arduino. Here we will use the serial method because the parallel method is efficient with the library and also follow the same protocol. The main reason for the LCD usage is to avoid the complexity of pins and get the larger display size.

The above command will only change when every LCD needs to convert from serial to parallel communication. After describing the above function just call it in the loop whenever the LCD needs to clear. The text display method is also the same is clear. To show any text it needs proper instructions. The instructions are given able through the function or directly in the loop. Heres the program for only text display: u8g. It should be according to the resolution size of display because the value of the axis defines the text location on the screen.

The next part sections shows how to display text. The graphical display screen has only one black color data display. If developers desired to show the image on the screen then it could happen. Only some protocols need to follow, which is the image should be in the hex format of the bitmap image.

Then the following command will help to show the image. There are multiple other functions like font control, text intensity, etc which is useable through the programming. All other functions are available in the examples of the library.

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