Grove OLED Display 1.12inch

Our new 1.12” OLED displays are perfect when you need a small display with 16 grayscale. The visible portion of the OLED measures 1.12” diagonal and contains 96x96 grayscale pixels. Because the display uses OLEDs, there is no backlight, and the contrast is very high.

This OLED uses the SSD1327(V1.0) or SH1107G(V2.1) driver chip, which manages the display. You can talk to the driver chip using 4-wire I2C (clock, data, power, and GND pins).

• Communicate Mode: I2C

• Grayscale Display: 16 Gray shades.

• Supports both Normal and Inverse Color Display.

• Supports Continuous Horizontal Scrolling.

• Grove compatible Interface

Version

Specifications

Platforms Supported

Getting Started

!!!Note This chapter is based on Win10 and Arduino IDE 1.6.9

Hardware

Here we will show you how this Grove - OLED Display works via a simple demo. First of all, you need to prepare the below stuffs:

This is an easy-to-use module, what you need to do is connect the module to I2C port of a Base Shield. There're 4 pins, defined as below.

Grove - OLED Display 1.12`` is an I2C module, we connect it to I2C port at this demo.

Software

• Please follow how to install an arduino library procedures to install library.

• Unzip the file and put to libraries folder of your Arduino IDE. There're many examples in this library, which is consist of

1. OLED_Bitmap_Inverse_Display

2. OLED_Draw_Bitmap

3. OLED_Hello_World

4. OLED_Inverse_Display

5. OLED_PrintNumbers

6. OLED_Scroll_Left

7. OLED_Scroll_Right

8. OLED_Z_Display_Driver_Test_Suite

!!!Note Please change the parameter of the SeeedGrayOled.init() base on different version. For V1.0, please config as SeeedGrayOled.init(SSD1327). For V2.1, please config as SeeedGrayOled.init(SH1107G).

• Now let's try upload OLED_Hello_World to Seeeduino V4. Open your Arduino IDE, click on File > Example > OLED_Display_96x96-master > OLED_Hello_World
• Then please try the other examples to see what will happen.

APIs of the library

Seeed Gray OLED library provides complete software interfaces to exercise the capabilities of SSD1327Z driver with a 96x96 gray OLED. Almost all useful features are implemented and all functions are in public scope. This makes Seeed Gray OLED Library extensible. Seeed Gray OLED library uses Arduino Wire library. Hence initialize wire library before initializing Seeed OLED library.

init()

Initializes the Seeed OLED frame and sets the display to Normal mode.

Example:

SeeedGrayOled.init();  //initialze SEEED Gray OLED display

clearDisplay()

Clears the whole screen. Should be used before starting a fresh start or after scroll deactivation. This function also sets the cursor to top left corner.

Example:

SeeedGrayOled.clearDisplay();  //clear the screen and set start position to top left corner

setNormalDisplay()

Configures the display to normal mode(non-inverse) mode.

Example:

SeeedGrayOled.setNormalDisplay();//Set display to normal mode (i.e non-inverse mode)

setContrastLevel(unsigned char ContrastLevel)

Set the contrast ratio of OLED display. ContrastLevel can be any number from 0 - 255. Example:

SeeedGrayOled.setContrastLevel(127); //Set display contrast ratio to half level( i.e 256/2 1 ).

setInverseDisplay()

Configures the display to inverse mode. Example:

SeeedGrayOled.setInverseDisplay();      //Set display to inverse mode

setHorizontalMode()

Configures the display to horizontal addressing mode. Example:

SeeedGrayOled.setHorizontalMode();      //Set addressing mode to Horizontal Mode

setVerticalMode()

Configures the display to vertical addressing mode. Texts are drawn in vertical mode. Please set the display to vertical mode before printing text. Example:

SeeedGrayOled.setVerticalMode();      //Set addressing mode to Vertical Mode

setTextXY(X,Y)

Set the text's position (cursor) to Xth Text Row, Yth Text Column.96x96 OLED is divided into 12 rows and 12 Columns of text. This row and column should not be confused with OLED Row and Column.

• X can be any number from 0 - 11.

• Y can be any number from 0 - 11.

Example:

SeeedGrayOled.setTextXY(0,0);  //Set the cursor to 0th Text Row, 0th Text Column

putChar(unsigned char c)

Print a character to OLED display starting from current address-pointer set by setTextXY(X,Y). This function is internally used by putString().

Example:

SeeedGrayOled.putChar('S'); //Print the character S

putString(cont char *string)

Print string to OLED display starting from current address-pointer set by setTextXY(X,Y) Example:

SeeedGrayOled.putString("Hello World!"); //Print the String

putNumber(long n)

Print numbers to OLED display starting from current address-pointer set by setTextXY(X,Y). Number can be any char,int or long datatype. It also takes care of -ve sign.

Example:

SeeedGrayOled.putNumber(-56123); //Print number -56123

drawBitmap(unsigned char *bitmaparray, int bytes)

Display a binary bitmap on the OLED matrix. The data is provided through a pointer to uni-dimensional array holding bitmap. The bitmap data is available in continuous rows of columns as like Horizontal Addressing mode. bytes is size of bitmap in bytes.

Example:

SeeedGrayOled.drawBitmap(SeeedLogo,96*96/8);   //  Draw binary Bitmap (96 pixels *96 pixels  / 8) bytes

setHorizontalScrollProperties

Set the properties of horizontal scroll.

• Direction can be any of Scroll_Left and Scroll_Right.

• startRow can be 0 - 127

• endRow can be 0 - 127. It should be greater than startRow

• startColumn can be 0 - 63

• endColumn can be 0 - 63. It should be greater than startRow

• scrollSpeed can be any of defines:Scroll_2Frames, Scroll_3Frames, Scroll_4Frames, Scroll_5Frames, Scroll_25Frames,Scroll_64Frames, Scroll_128Frames,Scroll_256Frames.

Example:

SeeedGrayOled.setHorizontalScrollProperties(Scroll_Left,72,95,0,47,Scroll_5Frames);  //Set the properties of Horizontal Scroll

activateScroll()

Enable scrolling. This should be used only after setting horizontal scroll properties. Example:

SeeedGrayOled.activateScroll();   //Enable scrolling.

deactivateScroll()

Disable scrolling. This should be used after activateScroll(); Example:

SeeedGrayOled.activateScroll();   //Disable scrolling.

Resources

• [Eagle] Grove-OLED Display 1.12inch in Eagle

• [PDF] Grove-OLED Display 1.12inch Sch

• [PDF] Grove-OLED Display 1.12inch PCB

• [Library] Github Repository of the Library

• [Datasheet] SSD1327 Datasheet

• [Datasheet] LY120 Datasheet

• [Datasheet] SH1107G_datasheet

• [Tool] Reference for Make a 96x96 Image