3.16 OLED Display

3.16.1 Overview

OLED display is also called organic light-emitting diode or organic dot laser display. This display is self-luminous. It adopts a very thin coating of organic materials and glass substrate which will light up if current passes through. Therefore, it does not require a back-light. Note that it will not light up when just powering on; programing and wiring are also needed.

Besides, it features large viewing Angle, low power consumption, high contrast, thin display, fast response, simple structure, and can work on flexion boards within a wide temperature range.

3.16.2 Parameters

Communication mode: I2C communication

Internal driver chip: SSH1106

Resolution: 128 x 64

3.16.3 Code Blocks

Blocks in LEDDisplay:

  1. t125 is used to control the OLED display of the coding box. Different display patterns can be created by yourself through the mouse.

  2. t126 is used to set the OLED display patterns.

  3. t127 clears all display.

  4. t128 shows a rectangle on the OLED. Just set the values of X and Y.

  5. t129 clears the display of t128.

  6. t130 sets characters to show on OLED.

  7. t131 sets scrolling characters to show on OLED.

  8. t132 stops showing scrolling characters on OLED.

The code blocks in TFT also control the display of OLED, and there are more ways for it. For details, please visit OLED Library | MicroBlocks Wiki.

Blocks in :

  1. t174 is a block included in coding box library. It controls the values in the characters or variables displayed by the OLED in the coding box. The display position and size can be set.

  2. t175 is a block included in coding box library. It clears the content displayed on the OLED.

3.16.4 Test Code

You can manually build blocks, or directly open the code file we provide: 3-16-OLED.ubp. If you have any questions about how to open code files or upload code, please back to 1.9 Upload Code.

Build code blocks:

  1. In , drag and to the script area, and stack them together.

t34

  1. In LEDDisplay, drag t135 and place in . Set the icon to t134.

  2. In , drag t4 and put it under t134.

  3. duplicate all t134 and put the copy under t4, and set the icon to t133.

Complete code:

t136

3.16.5 Test Result

Connect the coding box to the MicroBlocks via USB or Bluetooth, and click t59 to upload the code to the coding box. The OLED displays t134 and t133 alternately with each for 0.5s.