Difference between revisions of "Lesson 2--Microduino OLED Usage"

Objective

Learn the Microduino OLED and master how to use the library to derive the OLED.

Equipment

• Microduino-OLED

Microduino-Oled is a 0.96 inch 12864 OLED display module based on SSD1306. It uses I2C interface, and 3.3V power. The pixel is 128 * 64 (128 columns * 64 rows).

• Microduino-Core

• Microduino-Core+

• Microduino-FT232R

• Other equipments：
  • OLED adapter cable one
  • DuPont line four
  • USB cable one

IIC communication

Prepare work

• 【U8glib librarygoogle download 】
• Put the downloaded library into the libraries folder of the Arduino IDE;
• Open the example program. If you have opened the Arduino IDE, need to close firstly, then open the example program from the u8glib library:
• Connect the OLED to circuit according to IIC connection method.

Microduino-OLED

Program

Download program：File:Oled project.zip

Experiment 1

• Display character, including the specific character and the character changed according to data.

Grammar：

• The first line display "*_*Microduino*_*"；
• The second line display "Time："；
• The third line display time calculated by funcion mills(), use the ms as unit, and map into the second unit, only keep two decimal.
• Grammar：
  • u8g.setFont(XXX)uses to set font, no default font, must be defined.
  • u8g.setPrintPos(X,Y) uses to set he positon of the specified character,X represents the horizontal position coordinate, Y represents longitudinal coordinates. The Y value can't be 0 in top line, and the value should be greater than the height of the font.
  • u8g.print(XXX)uses to display character, static characters need to add " ", no need for change data;
  • u8g.drawStr(X, Y,XXX) uses to display specified character, can't display changing data；
  • u8g.setRot180()uses to font rotation, rotate character from 180 to 90, 270. The default value is 0;
  • Change font and coordinates need to add fonts and coordinate function in front of the display function;
  • When change font, need to find the font library in file u8g.h from U8glib\utility folder.

Experiment 2

• Draw picture

Open "OLED_Paint" example program, select board type and use the serial to downlaod. The experiment to realize how to draw a straight line, a solid, hollow, solid rectangular, hollow rectangular, apex angle bending rectangular, the system timing simulate the pointer of second hand.

• Grammar：
  • u8g.drawLine(X,Y,M,N) uses to draw a straight line；
    • X: starting horizontal position coordinates, Y: the starting point of the longitudinal coordinates, M: end horizontal position coordinates, N: the end of the longitudinal coordinate.
  • u8g.drawDisc(X,Y,D) uses to draw a solid:
    • X: horizontal coordinates, Y: longitudinal coordinate, D: diameter;
  • u8g.drawCircle(X,Y,D) uses to draw a hollow:
    • X: horizontal coordinates, Y: longitudinal coordinate, D: diameter;
  • u8g.drawFrame(X,Y,I,W) uses to draw a hollow rectangular:
    • X: horizontal coordinates, Y: longitudinal coordinate, I: length, W: wide;
  • u8g.drawBox(X,Y,I,W) uses to draw a solid rectangular；
    • X: horizontal coordinates, Y: longitudinal coordinate, I: long, W: wide
  • u8g.drawRFrame(X,Y,I,W,B) uses to draw a apex angle bending rectangular；
    • X: horizontal coordinates, Y: longitudinal coordinate, I: long, W: wide

Experiment 3

• Display chinese characters, images and dynamic text:

• • Display character using library. The images and chinese characters need to modulo then to print.

Modulo software：File:PCtolCD.zip

• Take the chinese character as example：

• • Make chinese character modulo code：

Step 1：Open the modulo software, select the mode "Character mode"；

Microduino-OLED

Step 2：Set font size as 32*32；

Microduino-OLED

Step 3：Input chinese character, you can choose font；

Microduino-OLED

Step 4：Set modulo format；

Microduino-OLED

Microduino-OLED

Step 5：Set the code;

Microduino-OLED

Step 6：Use the code to replace the character.

Grammar：

• u8g.drawXBMP( X, Y, I, W, XXXX);
  • X: horizontal coordinates, Y: longitudinal coordinate, I: long, W: wide, XXXX: Chinese character code name of the array.

Video

http://v.youku.com/v_show/id_XNjc1NTc1MTE2.html