Greetings!
Son and I would like to implement a simple menu system on our Arduino to control various LED's for the upcoming Holiday season! We were hoping to do something similar to this:
And the On and Off functionality such as:
We plan on using a keypad to have an UP, DOWN, ENTER, and MAIN MENU button. So far, most of the research done uses a generic character display but we would like to step up a notch and use a 4x20 OLED character display! 
The main difference is that the LiquidCrystal library may not be compatible with this display.
Instead, the display writes characters using commands. Here is an example of this:
/****************************************************
* PINOUT: Arduino Uno -> Character OLED *
****************************************************/
// The 8 bit data bus is connected to PORTD 0-7 of the Arduino Uno
// The 4 bit data bus is connected to PORTD 4-7 of the Arduino Uno
#define E_Pin 10
#define R_W 9
#define R_S 8
unsigned char mode = 4; // 4 = 4-Bit parallel
// 8 = 8-Bit Parallel
/****************************************************
* Text Strings *
****************************************************/
char const text1[] = (" Display ");
char const text2[] = (" International ");
char const text3[] = (" CHARACTER TEST ");
char const text4[] = (" 4-Bit Parallel ");
char const text5[] = (" 8-Bit Parallel ");
char const text6[] = ("ABCDEFGHIJKLMOPQRSTU");
char const text7[] = ("VWXYZabcdefghijklmno");
char const text8[] = ("pqrstuvwxyz123456789");
char const text9[] = (" <(' ')> || <(' ')> ");
/****************************************************
* Function Commands *
****************************************************/
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// 4-bit / 8-bit 6800 Parallel Interface
//-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
void latch() // command to latch E
{
digitalWrite(E_Pin, HIGH);
delay(1);
digitalWrite(E_Pin, LOW);
delay(2);
}
void command(char i)
{
switch(mode)
{
case 4: PORTD = i;
digitalWrite(R_S, LOW); // Command
digitalWrite(R_W, LOW); // Write
latch(); // Latch upper 4 bits
i = i<<4; // shift 4 bits
PORTD = i; // Take lower 4 bits
latch(); // Latch lower 4 bits
break;
case 8: PORTD = i;
digitalWrite(R_S, LOW); // Data
digitalWrite(R_W, LOW); // Write
latch(); // Latch 8 bits
break;
}
}
void data(char i)
{
switch(mode)
{
case 4: PORTD = i;
digitalWrite(R_S, HIGH); // Data
digitalWrite(R_W, LOW); // Write
latch(); // Latch upper 4 bits
i = i<<4; // shift 4 bits
PORTD = i; // Take lower 4 bits
latch(); // Latch lower 4 bits
break;
case 8: PORTD = i;
digitalWrite(R_S, HIGH); // Data
digitalWrite(R_W, LOW); // Write
latch(); // Latch 8 bits
break;
}
}
/****************************************************
* Display Functions *
****************************************************/
void clear_screen(){ // clear display
command(0x01);
}
void ret_home(){ // Return to home position
command(0x02);
}
void disp1(){ // DISPLAY TEXT
clear_screen();
ret_home(); // First Line
for( int i = 0; i< 20; i++){
data(text1[i]);
}
command(0xc0); // Second Line
for (int i = 0; i<20; i++){
data(text2[i]);
}
command(0x94); // Third Line
for( int i = 0; i< 20; i++){
data(text3[i]);
}
command(0xD4); // Fourth Line
for (int i = 0; i<20; i++){
switch(mode){
case 4:data(text4[i]);
break;
case 8:data(text5[i]);
break;
}
}
}
void disp2(){ // DISPLAY TEXT
clear_screen();
ret_home(); // First Line
for( int i = 0; i< 20; i++){
data(text6[i]);
}
command(0xc0); // Second Line
for (int i = 0; i<20; i++){
data(text7[i]);
}
command(0x94); // Third Line
for( int i = 0; i< 20; i++){
data(text8[i]);
}
command(0xD4); // Fourth Line
for (int i = 0; i<20; i++){
data(text9[i]);
}
}
/****************************************************
* Initialization Routine *
****************************************************/
void init1(){
digitalWrite(E_Pin, LOW);
delay(300);
switch(mode)
{
case 4:command(0x28); //Enable 4-Bit Mode
delay(5);
break;
case 8:command(0x38); //Enable 8-Bit Mode
delay(5);
break;
}
command(0x08); //Display OFF
delay(2);
command(0x01); //Clear Display
delay(2);
command(0x06); //Entry Mode set
delay(2);
command(0x02); //Return Home
delay(2);
command(0x0C); //Display ON
delay(2);
}
/*****************************************************
* Setup Function, to run once *
*****************************************************/
void setup() {
DDRD = 0xFF; // Enable pins on PORT D as outputs
DDRB = 0xFF; // Enable pins on PORT B as outputs
init1();
delay(100);
}
/*****************************************************
* Loop Function, to run repeatedly *
*****************************************************/
void loop() {
disp1();
delay(2500);
disp2();
delay(2500);
}
How can we implement this type of menu functionality using this display? Any example code would be greatly appreciated!