Grove RGB LCD Display
Chandler Matz.
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The Grove RGB LCD display is an LCD display with 2 lines of 16 characters. The display is backlit with an RGB backlight. The display is connected to an mbed microcontroller via an I2C interface. It can be purchased at http://www.seeedstudio.com/depot/Grove-LCD-RGB-Backlight-p-1643.html?cPath=34_36.
Wiring
| Mbed | Diplay |
|---|---|
| VU (+5v) | VCC |
| gnd | GND |
| p9 | SDA |
| p10 | SCL |
In order to connect the mbed to the display you need to use the +5v pin, the gnd pin, and a set of I2C pins (in this case p9 and p10). The +5v and gnd pins on the mbed will connect to the VCC and GND pins on the display, and the SDA and SCL pins on the mbed will connect to SDA and SCL on the display. You will need 2 pull up resistors connected from the +5v pin to the SDA and SCL lines in order for the I2C lines to work. 3.3k ohm resistors are recommended for these pull up resistors, as seen in the diagram below.
HelloWorld
Below is an example program for this display. The example program should display two lines of text on the display ("Hello World!" and "This is a test") while also cycling through colors on the RGB backlight.
Import library
Public Member Functions |
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| Grove_LCD_RGB_Backlight (PinName sda, PinName scl) | |
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Contructor.
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| void | setRGB (char r, char g, char b) |
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Set RGB Color of backglight.
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| void | clear () |
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Removes all of the text from the display.
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| void | print (char *str) |
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Prints text to the LCD display.
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| void | locate (char col, char row) |
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Move cursor to specified location on the LCD screen.
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Import programGrove_LCD_RGB_Backlight_HelloWorld
Example program for Grove RGB LCD display.
Last commit 15 Mar 2016 by Chandler Matz
Data Sheets
RGB Data Sheet: http://www.seeedstudio.com/wiki/images/1/1c/PCA9633.pdf
LCD Data Sheet: http://www.seeedstudio.com/wiki/images/0/03/JHD1214Y_YG_1.0.pdf
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