Matrix - I2C LCD1602

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1 Introduction

I2C LCD1602

I2C LCD1602

This is an LCD module which has an I2C controller. It can display 16 x 2 characters. Its interface is parallel. To simplify its application we designed a controller on this module, which interfaces with other modules through I2C and transfers received signals to parallel signals to LCD1602. It can display, turn on and off back light.

2 Features

• I2C interface. It can display characters, and turn on and off back light
• 2.54 mm spacing pin

3 How To

3.1 Connection

• Connect Tiny4412 SDK (1506)

GND: Ground

VCC: 5V

SDA: I2C SDA

SCL: I2C SCL

3.2 Code Sample in C Under Linux

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include "libfahw.h"
 
void test(char* line1, char* line2)
{
    int devFD;
    if ((devFD = LCD1602Init()) == -1) {
        printf("Fail to init LCD1602\n");
        return;
    }
 
            if (LCD1602Clear(devFD) == -1) {
                    printf("Fail to Clear\n");
                    return;
            }
 
    if (LCD1602DispLines(devFD, line1, line2) == -1) {
        printf("Fail to Display String\n");
        return ;
    }
 
    LCD1602DeInit(devFD);
}
 
int main(int argc, char ** argv) {
    int i;
    for (i=0; i<10; i++) {
         test("FriendlyARM", "From 2003");
         sleep(3);
    }
    return 0;
}

3.3 Compile and Run

git clone http://github.com/friendlyarm/fa-hardware.git
cd fa-hardware
cd demo
cd matrix-i2c_lcd1602
make

Copy your compiled bin to your board and you are ready to go.