EP-0058

RGB LCD 1602

Description

This RGB 1602 full color module is based on i2c protocol, with 5 input buttons.
The background light can be changed by coordinate PWM, and it also support Raspberry Pi 3B.
You have three colors to chose, RBG(red,green, blue), you can change it as you will freely.
You can just plug it into your Raspberry Pi and drive it through i2c protocol control the mcp23016 expand IO port.
It reduced occupation of the GPIO Pins and you can use wiringPi's lcd library to control it.

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Compatibility List

• Compatibility

Platform	Screen and driver board	Notes
Raspberry Pi 3 Model B Plus	WIP
Raspberry Pi 3 Model B	√
Raspberry Pi 2 Model B	√

Features

• Designed for Raspberry Pi, support Raspberry Pi 3 mode B
• Three optional RGB(red,green,blue) backlight.
• Three independly coordinate pins can be use.
• High quilaty 16x2 display
• size 2.95X4.35(WXH)mm
• Builtin HD44780 controller can be attached to MCU directly
• Main Controller driver chip is SplC780, can be compatible with other main controller such as 0066(SAMSUNG),SPLC780(SUNPLUS) and so on
  
• Character generator ROM can provide 192 different characters. (5x7 can be 160 or 5x10 can be 32)
• 64bit custom RAM, can provide 8 8x8 dot characters or 2/4 5x11 dot characters
• 80 byte RAM
• MCP23017 IO expand port.
• Open source refference : [1]
• 5 customized button can be defined to different functions.

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Product Details

type	value
work voltage	5V
backlight	red green blue
maximum current	60mA
LCD display type	STN
work temprature	0～+50℃
storage temprature	-20～+70℃
scale	82x58(mm)
display scale	64.5x16(mm)
character number	16x2
control chip	SplC780
mount hole	75.0*31.0/ 2.8mm
LCD pixel	0.55*0.65mm
connector	18PIN,PH2.54,1.0mm

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Overview

File:RGB1602 p1.JPG

File:RGB1602 p4.JPG

File:RGB1602 p5.JPG

File:RGB1602 p3.JPG

File:Rgb1602 01.JPG

File:Show2.JPG

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Schematic

File:1602test1.png

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LCD module scale

File:Rgb1602 show3.JPG

File:1602RGB dimention.png

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RGB1602 pin description

pin number	chart	function
1	Vss	GND
2	Vdd	Voltage supply
3	Vo	LCD contrast
4	RS	register select
5	R/W	read or write select
6	E	enable
7	DB0	data pin 0
8	DB1	data pin 1
9	DB2	data pin 2
10	DB3	data pin 3
11	DB4	data pin 4
12	DB5	data pin 5
13	DB6	data pin 6
14	DB7	daata pin 7
15	LEDA	LED backlight voltage supply
16	LEDR	red LED backlight control
17	LEDG	green LED backlight control
18	LEDB	blue LED backlight control

File:1602 RGB test3.png

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How to make it work

• If it's the first time for you to use Raspberry Pi, please make sure the I2C interface is enabled.
• You also need to install wiringPi library. This page will show you how to install wiringPi. http://wiringpi.com/download-and-install/
• If you are done install the wiringPi and enabling I2C interface, type the following code in the console to build a .c file

sudo vim.tiny lcd1602.c

File:1602 tech1.png

• Copy and paste the following demo code into lcd1602.c

File:1602 tech2.png

• Under the vim.tiny editor, type ":", then type "wq" and press "enter" to save the lcd1602.c file and exit editor

File:1602 tech3.png

• Next you need to compile the code using gcc.
  

Type gcc lcd1602.c -lwiringPi /home/pi/wiringPi/devLib/lcd.o -o lcd1602 in the console to compile.

File:1602 tech5.png

• You should find an executable file named "lcd1602" if the last step was completed.
  

Type the following code sudo modprobe i2c-dev to load the I2C interface

File:1602 tech6.png

File:1602 tech8.png

• Lastly, type sudo ./lcd1602 , and the module will be displaying the demo text, as the following photo shows.

File:1602 tech9.png

File:Show2.JPG

• This is a gif showing the different backlight color

File:Show1.gif

Demo Code

#include <stdio.h>                                                            //include standard input output head file                                                            
#include <wiringPi.h>                                                         //include wiringpi                                                     
#include <mcp23017.h>                                                         //include mcp23017 control head file                                         
#include <lcd.h>                                                              //include LCD control head file                                                   
#include <softPwm.h>                                                          //include PWM control head file
int main()
{
	long value=0;       
	int rand_num;	 
	int value_blue;                                                       //the blue backlight brightness
	int value_red;                                                        //the red backlight brightness
	int value_green;                                                      //the green backlight brightness
	int display,i,count;                                                 
	wiringPiSetup();                                                      //init wiringPi                                                    
	mcp23017Setup (100, 0x20);                                            //init mcp23017 chip I2C address: 0x20,the first pin number: 100                                          
	printf ("Raspberry Pi - MCP23017 Test\n");                            //print information
	for(i=0;i<16;i++)                            
	pinMode(100+i,OUTPUT);                                                //set pin 100 - 115 as output                          
	digitalWrite(101,0);                                                  //set pin 101 low voltage                              
	display=lcdInit(2,16,4,100,102,103,104,105,106,0,0,0,0);      //lcd init 2*16,4 bit control,use 100,101,102,103,104 pin as control pin         
	lcdHome(display);                                                     //reset cursor  
	lcdClear(display);                                                    //clear screen   
	lcdPosition(display,0,0);                                             //set display location (0,0)   
	lcdPuts(display,"Hello World");                                       //print string "Hello World"
	lcdPosition(display,0,1);                                             //set display location(0,1)  
	lcdPuts(display,"www.52pi.net");                            	      //print string "www.52pi.net"		
	pinMode(0, OUTPUT);                                                   //set Raspberry pi pin 0 as output   
	pinMode(2, OUTPUT);                                                   //set Raspberry Pi pin 2 as output  
	pinMode(3, OUTPUT);                                                   //set Raspberry Pi pin 3 as output
	softPwmCreate (3, 50, 100);                                           //set soft PWM pin 3 PWM scale (0-100) original 50
	softPwmCreate (2, 50, 100);                                           //set soft PWM pin 2 PWM scale (0-100) original 50
	softPwmCreate (0, 50, 100);                                           //set soft PWM pin 0 PWM scale (0-100) original 50
while(1)                                                                      //always display
{       
  
	delay(200);                                                            //delay 200ms
        value_red=(value<100)?value:0;                                         //0-100 red change
	value_green=(value>100&&value<200)?(value-100):0;                      //100-200 green change 
	value_blue=(value>200)?(value-200):0;                                  //200-300 blue change        
	if(value>300)                                                          //>300 random colour
	{
		value_red=rand()%100;
		value_green=rand()%100;
		value_blue=rand()%100;
	}
	//rand_num=rand();
	softPwmWrite (3,value_red);                                             //soft PWM control red backlight
	softPwmWrite (2,value_green);                                           //soft PWM control green backlight
	softPwmWrite (0,value_blue);                                            //soft PWM control blue backlight

	value++;
	if(value>900)                                                           //if value >900 return
	{                   
		value=0;
	}
		
	lcdPosition(display,13,1);                                                 
	lcdPrintf(display,"%d",value);                                           //print number value
	//value_blue=0;
		
	}
}

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Attachment

LCD manuals
demo code