Arduino mega 128 pinout
Search for U8g2 and press install for the U8g2 by Oliver libraryįile ▸ Examples ▸ U8g2 ▸ page_buffer ▸ GraphicsTest Sketch ▸ Include Library ▸ Manage libraries. The circuit is now completely finished! Time to code! □ Arduino CodeĪs indicated earlier, we use the U8g2 library. On the display it is labeled RS which stands for Register Select and it will be connected to pin 10 on the Arduino. The last step is to connect the CS (chip select) wire. On the display it is labeled as pin E.įor the Master In Slave Out MOSI of the SPI protocol we connect Arduino pin 11 (blue line) to the RW pin (read / write) on the display. We will use 'Pin 13' on the Arduino (orange line) as serial clock 'SCK'. The last step is to connect the data lines for the SPI communication. In our case we have to make the PSB pin LOW by connecting it to the - rail. If we make the PSB pin high, the display expects parallel data, with LOW serial. With the PSB pin we can set the data transfer mode. The name already reaveals it a bit, the data is serial.
![arduino mega 128 pinout arduino mega 128 pinout](https://elosciloscopio.com/wp-content/uploads/2021/03/Mega-tutorial-de-Arduino-Pinout.png)
We are going to use the SPI (Serial Peripheral Interface) protocol. Now we have to tell the display how we are going to provide the data. We connect the 3V3 on the Arduino to the BLA (Backlight Anode), and the BLK (BackLight Cathode) to the - rail on the breadboard. The backlight LEDs work on 3.3V, so DO NOT connect it to the 5V because then you can damage the backlight. This is an LED backlight with an anode (+) and cathode (-). Then it is time to connect the backlight. Circuit step 2 Step 3 - LCD backlight (optional) Connect these to the + rail and - rail on the breadboard. To do this, we use the 'Vcc' and 'GND' pins on the far right of the display. The next step is to provide 5V to the LCD. For this we connect the '5V' on the :KnSgtg:Arduino:: to the breadboard. We start by supplying the breadboard with 5V on the + rail (red) and GND on the - rail (blue). ST7920 pin overlay The circuit Step 1 - breadboard If the pin overlay does not not fit exactly, check your printer settings to see if the magnification is set to 100%. You can now place this exactly at the bottom of your display and see the pin labels again.
![arduino mega 128 pinout arduino mega 128 pinout](https://www.theengineeringprojects.com/wp-content/uploads/2017/07/ATmega328-Pinout.png)
To solve this I've created a pin overlay. If you put the display into the breadboard you'll see that the pin labels are no longer visible. Printing the ST7920 pin overlayīreadboard. The big advantage is that you don't have to find out how to control each individual display. Currently U8g2 supports over 200 different displays. Text is also no problem.Īn overview of all available functions can be found on the U8g2 reference page. U8g2 allows you to draw graphic elements such as lines, rectangles, circles on the screen. The U8g2 library is specially made to easily control monochrome displays in an universal way.
![arduino mega 128 pinout arduino mega 128 pinout](https://static.elektroda.pl/attach/Pinout_Arduino_Mega___Estlcam_8002012.jpg)
More technical information is described in the ST7920 datasheet U8g2 library ST7920 refers to the display controller which is made by Taiwanese Sitronix. The light is transmitted differently making it appear black. With LCD it looks like the boxes can become black. These segments are placed as an '8' in some screens like a digital clock, in others as pixels. This screen is made up of segments that can be turned on or off. ST7920 is a so-called LCD which stands for Liquid Crystal Display. ST7920 LCD dot-matrix display ST7920 LCD dot-matrix display This button allows you to download the code, circuit diagram and other files relevant to this Arduino tutorial. Course materialĪt the bottom of this page you'll find the course material button. In this lesson you'll learn how to display the demo code of the ( ) on your screen. How cool is it to display information on a screen? In tutorial 11 we already looked at an