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LCDscrollmenu.ino
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LCDscrollmenu.ino
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#include <Arduino.h>
/*
* Concept of scrolling LCD menu.
*
* you have to uncomment at least either BUTTON_ENABKED, or either ROTARY_ENABLED (, or both).
*
*/
#define BUTTONS_ENABLED // uncomment this line if you want use buttons
#define ROTARY_ENABLED // uncomment this line if you want use rotary encoder switch
// control menu by buttons
#ifdef BUTTONS_ENABLED
#define pin_up 5
#define pin_down 18
#define pin_button 26
#endif
// control menu by rotary switch
#ifdef ROTARY_ENABLED
#define ROTARY_A 4 // somtimes reffering as CLK on rotary switch
#define ROTARY_B 15 // somtimes reffering as DT on rotary switch
#define ROTARY_SW 27 // rotary button pin
#define CLICKS_PER_STEP 4 // this number depends on your rotary encoder
#include "ESPRotary.h";
ESPRotary r;
#include "Button2.h"; // https://github.com/LennartHennigs/Button2
Button2 b;
#endif
#include <LiquidCrystal_I2C.h>
#define LCDADDR 0x27 // address of LCD on I2C bus
#define LCDLINES 4 // how many lines of the LCD
#define LCDCOLUMNS 20 // how many columns of the LCD
LiquidCrystal_I2C lcd(LCDADDR, LCDCOLUMNS, LCDLINES);
// roundup = ceil();
int menu_cursor = 0;
int cursorpos_prev=1; //dont change it
const int maxmenuitem = 14; // elements number of menu_labels
const char *menu_labels [maxmenuitem] = // create menu labels
{
"Info page 1",
"Menu 2",
"Menu 3",
"Menu 4",
"Menu 5",
"Menu 6",
"Menu 7",
"Menu 8",
"Menu 9",
"Menu 10",
"Menu 11",
"Menu 12",
"Menu 13",
"Lastmenu"
};
bool menu_selected [maxmenuitem] = { false };
/*
false,
false,
false,
false,
false,
false,
false,
false
};
*/
/* not in use.
//count elements of an array
int arrayCount (char *arr)
{
return sizeof(arr)/sizeof(*arr);
}
*/
/*
*
* rotary
*
*/
#ifdef ROTARY_ENABLED
// single click
void click(Button2& btn) {
buttonSelect();
Serial.println("Click!");
}
// long click
void resetPosition(Button2& btn) {
r.resetPosition();
Serial.println("Reset!");
}
#endif
/*
*
* MENU
*
*/
void showMenu(int cursorpos)
{
Serial.println(cursorpos);
if (cursorpos < LCDLINES)
{
if ( maxmenuitem < LCDLINES)
{
for (int ROW=0; ROW < maxmenuitem; ROW++)
{
lcd.setCursor(1,ROW);
lcd.print(" ");
delay(10);
lcd.setCursor(1,ROW);
lcd.print(menu_labels[ROW]);
Serial.print("1st ");
Serial.print("Menu label: "); Serial.println(menu_labels[ROW]);
}
}
else
{
for (int ROW=0; ROW < LCDLINES; ROW++)
{
lcd.setCursor(1,ROW);
lcd.print(" ");
delay(10);
lcd.setCursor(1,ROW);
lcd.print(menu_labels[ROW]);
Serial.print("2nd ");
Serial.print("Menu label: "); Serial.println(menu_labels[ROW]);
}
}
}
else
{
int labelPos = cursorpos-(LCDLINES-1);
for (int ROW=0; ROW < 4 ; ROW++)
{
lcd.setCursor(1,ROW);
lcd.print(" ");
lcd.setCursor(1,ROW);
int labelno= labelPos + ROW;
lcd.print(menu_labels[labelno]);
Serial.print("3rd ");
Serial.print("Menu label: "); Serial.println(menu_labels[labelno]);
}
}
}
void menuSelected(int menuPoint)
{
if (menu_selected[menuPoint])
{
switch (menuPoint)
{
/*
* write your menus loops in the cases.
* 1st menupoint always 0.
* you have to exetend cases to maxemnucases-1.
* e.g. maxemenuitems = 14 then your last case is 13
*/
case 0 :
lcd.clear();
lcd.setCursor(0,0);
lcd.print("info page 1");
delay(500);
break;
case 1 :
lcd.clear();
lcd.setCursor(0,0);
lcd.print("info page 1");
delay(500);
break;
case 2 :
break;
case 3 :
break;
}
}
}
void menuCursorPos(int cursorpos)
{
if (cursorpos != cursorpos_prev)
{
showMenu(cursorpos);
lcd.setCursor(0,cursorpos_prev);
lcd.print(" ");
}
if (cursorpos < LCDLINES)
{
lcd.setCursor(0,cursorpos);
}
else
{
lcd.setCursor(0,LCDLINES-1);
}
if (!menu_selected[menu_cursor])
{
lcd.print(">");
}
else
{
lcd.print("X");
}
cursorpos_prev = cursorpos;
}
void buttonUp()
{
static unsigned long last_interrupt_time = 0;
unsigned long interrupt_time = millis();
// If interrupts come faster than 200ms, assume it's a bounce and ignore
if ( (interrupt_time - last_interrupt_time) >= 200)
{
if ( menu_cursor < (maxmenuitem - 1) && !menu_selected[menu_cursor] )
{
menu_cursor++;
//menuCursorPos(menu_cursor);
}
}
last_interrupt_time = interrupt_time;
}
void buttonDown()
{
static unsigned long last_interrupt_time = 0;
unsigned long interrupt_time = millis();
// If interrupts come faster than 200ms, assume it's a bounce and ignore
if ( (interrupt_time - last_interrupt_time) >= 200)
{
if ( menu_cursor > 0 && !menu_selected[menu_cursor] )
{
menu_cursor--;
//menuCursorPos(menu_cursor);
}
}
last_interrupt_time = interrupt_time;
}
void buttonSelect()
{
static unsigned long last_interrupt_time = 0;
unsigned long interrupt_time = millis();
// If interrupts come faster than 200ms, assume it's a bounce and ignore
if ( (interrupt_time - last_interrupt_time) >= 200)
{
menu_selected[menu_cursor] = !menu_selected[menu_cursor];
// may you need make menuselect overrides here if you want to do anithing in the menu.
if (menu_selected[menu_cursor])
{
Serial.print("menu selected: ");
}
else
{
Serial.print("menu unselected: ");
cursorpos_prev++;
}
Serial.println(menu_cursor);
}
last_interrupt_time = interrupt_time;
}
#ifdef ROTARY_ENABLED
// on change
void rotate(ESPRotary& r) {
Serial.println(r.getPosition());
}
// on left or right rotation
void showDirection(ESPRotary& r) {
Serial.println(r.directionToString(r.getDirection()));
if ( r.directionToString(r.getDirection()) == "LEFT" )
{
buttonDown();
}
if ( r.directionToString(r.getDirection()) == "RIGHT" )
{
buttonUp();
}
}
#endif
void setup()
{
Serial.begin(115200); //Serial Monitor Console Baud Setting
while (!Serial)
{
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("");
#ifdef BUTTONS_ENABLED
// set up butons
pinMode(pin_up, INPUT_PULLUP); //RotaryCLK
pinMode(pin_down, INPUT_PULLUP); //RotaryDT
pinMode(pin_button, INPUT_PULLUP); //Button
attachInterrupt(digitalPinToInterrupt(pin_up), buttonUp, FALLING); //PushButton down pin is an interrupt pin
attachInterrupt(digitalPinToInterrupt(pin_down), buttonDown, FALLING); //PushButton down pin is an interrupt pin
attachInterrupt(digitalPinToInterrupt(pin_button), buttonSelect, FALLING); //PushButton pin is an interrupt pin
#endif
#ifdef ROTARY_ENABLED
// set up rotary
pinMode(ROTARY_A, INPUT_PULLUP); //RotaryCLK
pinMode(ROTARY_B, INPUT_PULLUP); //RotaryDT
pinMode(ROTARY_SW, INPUT_PULLUP); //Button
r.begin(ROTARY_A, ROTARY_B, CLICKS_PER_STEP);
r.setChangedHandler(rotate);
r.setLeftRotationHandler(showDirection);
r.setRightRotationHandler(showDirection);
b.begin(ROTARY_SW);
b.setTapHandler(click);
b.setLongClickHandler(resetPosition);
#endif
//maxmenuitem = arrayCount(*menu_labels);
Serial.println(maxmenuitem);
lcd.begin();
lcd.clear();
menuCursorPos(menu_cursor);
}
void loop()
{
yield();
#ifdef ROTARY_ENABLED
r.loop();
b.loop();
#endif
menuCursorPos(menu_cursor);
menuSelected(menu_cursor);
}