EP-0058
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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.
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.
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 |
Overview
Schematic
LCD module scale
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 |
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
- Copy and paste the following demo code into lcd1602.c
- Under the vim.tiny editor, type ":", then type "wq" and press "enter" to save the lcd1602.c file and exit editor
- 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.
- 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
- Lastly, type
sudo ./lcd1602
, and the module will be displaying the demo text, as the following photo shows.
- This is a gif showing the different backlight color
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; } }