Hi guys!
Recently, I've been trying to develop a menu for a 20x4 LCD Display using a Rotary Encoder.
Until now I've managed to have menu displayed, but I wish to extend it an have sub-menus as well.
By now I can only scroll through the main menu code, but not also through the sub-menu.
I think I know where the problem is.
When getting into a sub-menu, if the rotary is turned than the interrupt is trigered and the move_Up or move_Down function is called and therefore the main_menu is printed.
Does anyone have any idea, how could I use the rotary rotation and selection options within the sub-menus as well.
Thanks!
This is the code that i've done by now:
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
#define PINA 2
#define PINB 3
#define PUSHB 4
volatile boolean turned; // rotary was turned
volatile boolean fired; // knob was pushed
volatile boolean up; // true when turned cw
int CursorLine = 0;
int DisplayFirstLine = 0;
char* MenueLine[] = {" Option 1"," Option 2"," Option 3"," Option 4"," Option 5"};
char* One[] = {" One-1"," One-2"," One-3"," One-4"," One-5"};
char* Two[] = {" Two-1"," Two-2"," Two-3"," Two-4"," Two-5"};
char* Three[] = {" Three-1"," Three-2"," Three-3"," Three-4"," Three-5"};
int MenueItems;
// Variable for the button's current state.
// button_mode = 1 when the button is up, and 0 when the button is pressed.
// This variable is 'static' and persists because it is declared outside of a function.
int button_mode = 1;
// Interrupt Service Routine for a change to encoder pin A
void isr ()
{
if (digitalRead (PINA))
up = digitalRead (PINB);
else
up = !digitalRead (PINB);
turned = true;
} // end of isr
void setup ()
{
digitalWrite (PINA, HIGH); // enable pull-ups
digitalWrite (PINB, HIGH);
digitalWrite (PUSHP, HIGH);
attachInterrupt(3, isr, CHANGE);
lcd.begin (20,4);
} // end of setup
void loop ()
{
if (turned)
{
if (up)
move_up();
else
move_down();
turned = false;
}
clickPin();
} // end of loop
void clickPin()
{
if ((digitalRead(PUSHB) == LOW) && (button_mode == 1))
{
// Button was up before, but is pressed now. Set the button to pressed
button_mode = 0; // Button is pressed.
selection();
fired = false;
}
else if ((digitalRead(PUSHB) == HIGH) && (button_mode == 0))
{
// Button was down before, but is released now. Set the button to released.
button_mode = 1;
}
}
void print_menu()
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" Main Menu ");
for (int i=1;i<4;i++)
{
lcd.setCursor(0,i);
lcd.print(MenueLine[DisplayFirstLine + i]);
}
lcd.setCursor(0,(CursorLine-DisplayFirstLine)+1);
}
void print_menu1()
{
lcd.clear();
for (int i=1;i<4;i++)
{
lcd.setCursor(0,i);
lcd.print(One[DisplayFirstLine + i]);
}
lcd.setCursor(0,(CursorLine-DisplayFirstLine));
}
void print_menu2()
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Menu option 2");
for (int i=1;i<4;i++)
{
lcd.setCursor(0,i);
lcd.print(Two[DisplayFirstLine + i]);
}
lcd.setCursor(0,(CursorLine-DisplayFirstLine));
}
void print_menu3()
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Menu option 3");
for (int i=1;i<4;i++)
{
lcd.setCursor(0,i);
lcd.print(Three[DisplayFirstLine + i]);
}
lcd.setCursor(0,(CursorLine-DisplayFirstLine));
}
void move_down()
{
if (CursorLine == (DisplayFirstLine+4-1))
{
DisplayFirstLine++;
}
if (CursorLine == (MenueItems-1))
{
CursorLine = 0;
DisplayFirstLine = 0;
}
else
{
CursorLine=CursorLine+1;
}
print_menu();
}
void move_up()
{
if ((DisplayFirstLine == 0) & (CursorLine == 0)) {
DisplayFirstLine = MenueItems-4;
}
else if (DisplayFirstLine == CursorLine)
{
DisplayFirstLine--;
}
if (CursorLine == 0)
{
CursorLine = MenueItems-1;
}
else
{
CursorLine=CursorLine-1;
}
print_menu();
}
void selection()
{
lcd.clear();
lcd.print("MY MENU:");
lcd.setCursor(0,1);
lcd.print("You selected:");
lcd.setCursor(0,2);
lcd.print(MenueLine[CursorLine]);
delay(2000);
lcd.clear();
switch (CursorLine)
{
case 0:
First();
break;
case 1:
Second();
break;
case 2:
Third();
break;
case 3;
break;
default:
break;
}
}
void First()
{
lcd.setCursor(0,0);
lcd.print("You are in menu:");
lcd.setCursor(0,1);
lcd.print("ONE");
print_menu1();
}
void Second()
{
lcd.setCursor(0,0);
lcd.print("You are in menu:");
lcd.setCursor(0,1);
lcd.print("TWO");
print_menu2();
}
void Third()
{
lcd.setCursor(0,0);
lcd.print("You are in menu:");
lcd.setCursor(0,1);
lcd.print("THREE");
print_menu3();
}
