Arduino Code example for Newhaven COG LCD display NHD-C0220AZ.
/*****************************************************************************
*
/ Program for writing to NHD-C0220(AZ + AA) display Series with the NT7605 Controller.
/ This code is written for the Arduino Uno R3 using 4-bit Parallel Interface
/
/ Newhaven Display invests time and resources providing this open source code,
/ Please support Newhaven Display by purchasing products from Newhaven Display!
* Copyright (c) 2019, Newhaven Display International
*
* This code is provided as an example only and without any warranty by Newhaven Display.
* Newhaven Display accepts no responsibility for any issues resulting from its use.
* The developer of the final application incorporating any parts of this
* sample code is responsible for ensuring its safe and correct operation
* and for any consequences resulting from its use.
* See the GNU General Public License for more details.
*
*****************************************************************************/
/****************************************************
* Pinout on Arduino Uno *
*****************************************************/
#define RS 8
#define RW 9
#define EPIN 10
const char text1[]={" Newhaven Display "};
const char text2[]={"Chip-On-Glass Module"};
const char text3[]={"2-Line 20-Characters"};
const char text4[]={"AZ+AA Series Display"};
const char text5[]={" Please Enjoy "};
const char text6[]={" Responsibly :) "};
/****************************************************
* Function Commands *
*****************************************************/
void latch(){ // command to latch E
digitalWrite(EPIN, HIGH);
delay(1);
digitalWrite(EPIN, LOW);
delay(1);
}
void command(char i){
PORTD = i;
digitalWrite(RS, LOW); // Command
latch(); // take upper 4 bits
i = i<<4; // shift 4 bits
PORTD = i; // Take lower 4 bits
latch();
}
void data(char i){
PORTD = i;
digitalWrite(RS, HIGH); // Data
latch(); // take upper 4 bits
i = i<<4; // shift 4 bits
PORTD = i; // Take lower 4 bits
latch();
}
void disp_pic(){
int i;
for (i=0;i<20;i++){
data(text1[i]);
delay(10);
}
command(0xC0);
for (i=0;i<20;i++){
data(text2[i]);
delay(10);
}
delay(1000);
command(0x01);
for (i=0;i<20;i++){
data(text3[i]);
delay(10);
}
command(0xC0);
for (i=0;i<20;i++){
data(text4[i]);
delay(10);
}
delay(1000);
command(0x01);
for (i=0;i<20;i++){
data(text5[i]);
delay(10);
}
command(0xC0);
for (i=0;i<20;i++){
data(text6[i]);
delay(10);
}
delay(1000);
command(0x01);
for (i=0;i<20;i++){
data(0xFF);
delay(10);
}
command(0xC0);
for (i=0;i<20;i++){
data(0xFF);
delay(10);
}
delay(1000);
command(0x01);
}
/****************************************************
* Initialization For controller *
*****************************************************/
void init1()
{
PORTD = 0x20; // Place 0x20 onto port D
latch(); // Wake Up
delay(5);
latch(); // Function Set
delay(5);
PORTD = 0x80; //Place 0x80 onto port D
latch();
delay(5);
command(0x0C); // Display ON
delay(5);
command(0x06); // Entry Mode Set
delay(5);
command(0x01); // clear display
delay(5);
command(0x02); //Return Home
}
/*****************************************************
* Setup Function, to run once *
*****************************************************/
void setup() {
DDRD=0xFF; // Port D as output
DDRB=0xFF; // Port B as output
delay(100);
init1();
}
/*****************************************************
* Loop Function, to run repeatedly *
*****************************************************/
void loop() {
disp_pic();
delay(100);
}