Szukając konkretnych zastosowań enkodera rotacyjnego, o którym powstała już notatka, trafiłem na świetny tutorial wykorzystujący urządzenie do wyświetlania prostego menu na ekranie Nokia 5110 LCD. Czyli dwa grzyby w barszcz.
Tutorial pochodzi z witryny educ8s.tv. Program napisał Nick Koumaris. Link do tutoriala: Arduino Rotary Encoder Menu
Połączenia:
KOD:
//////////////////////////////////////////////
// Arduino Rotary Encoder Menu //
// v1.0 //
// http://www.educ8s.tv //
/////////////////////////////////////////////
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>
#include <ClickEncoder.h>
#include <TimerOne.h>
int menuitem = 1;
int frame = 1;
int page = 1;
int lastMenuItem = 1;
String menuItem1 = "Contrast";
String menuItem2 = "Volume";
String menuItem3 = "Language";
String menuItem4 = "Difficulty";
String menuItem5 = "Light: ON";
String menuItem6 = "Reset";
boolean backlight = true;
int contrast=37;
int volume = 50;
String language[3] = { "EN", "ES", "EL" };
int selectedLanguage = 0;
String difficulty[2] = { "EASY", "HARD" };
int selectedDifficulty = 0;
boolean up = false;
boolean down = false;
boolean middle = false;
ClickEncoder *encoder;
int16_t last, value;
Adafruit_PCD8544 display = Adafruit_PCD8544( 5, 4, 3); //Download the latest Adafruit Library in order to use this constructor
void setup() {
pinMode(7,OUTPUT);
turnBacklightOn();
encoder = new ClickEncoder(A1, A0, A2);
encoder->setAccelerationEnabled(false);
display.begin();
display.clearDisplay();
setContrast();
Timer1.initialize(1000);
Timer1.attachInterrupt(timerIsr);
last = encoder->getValue();
}
void loop() {
drawMenu();
readRotaryEncoder();
ClickEncoder::Button b = encoder->getButton();
if (b != ClickEncoder::Open) {
switch (b) {
case ClickEncoder::Clicked:
middle=true;
Serial.println("Clicked");
break;
}
}
if (up && page == 1 ) {
up = false;
if(menuitem==2 && frame ==2)
{
frame--;
}
if(menuitem==4 && frame ==4)
{
frame--;
}
if(menuitem==3 && frame ==3)
{
frame--;
}
lastMenuItem = menuitem;
menuitem--;
if (menuitem==0)
{
menuitem=1;
}
}else if (up && page == 2 && menuitem==1 ) {
up = false;
contrast--;
setContrast();
}
else if (up && page == 2 && menuitem==2 ) {
up = false;
volume--;
}
else if (up && page == 2 && menuitem==3 ) {
up = false;
selectedLanguage--;
if(selectedLanguage == -1)
{
selectedLanguage = 2;
}
}
else if (up && page == 2 && menuitem==4 ) {
up = false;
selectedDifficulty--;
if(selectedDifficulty == -1)
{
selectedDifficulty = 1;
}
}
if (down && page == 1) //We have turned the Rotary Encoder Clockwise
{
down = false;
if(menuitem==3 && lastMenuItem == 2)
{
frame ++;
}else if(menuitem==4 && lastMenuItem == 3)
{
frame ++;
}
else if(menuitem==5 && lastMenuItem == 4 && frame!=4)
{
frame ++;
}
lastMenuItem = menuitem;
menuitem++;
if (menuitem==7)
{
menuitem--;
}
}else if (down && page == 2 && menuitem==1) {
down = false;
contrast++;
setContrast();
}
else if (down && page == 2 && menuitem==2) {
down = false;
volume++;
}
else if (down && page == 2 && menuitem==3 ) {
down = false;
selectedLanguage++;
if(selectedLanguage == 3)
{
selectedLanguage = 0;
}
}
else if (down && page == 2 && menuitem==4 ) {
down = false;
selectedDifficulty++;
if(selectedDifficulty == 2)
{
selectedDifficulty = 0;
}
}
if (middle) //Middle Button is Pressed
{
middle = false;
if (page == 1 && menuitem==5) // Backlight Control
{
if (backlight)
{
backlight = false;
menuItem5 = "Light: OFF";
turnBacklightOff();
}
else
{
backlight = true;
menuItem5 = "Light: ON";
turnBacklightOn();
}
}
if(page == 1 && menuitem ==6)// Reset
{
resetDefaults();
}
else if (page == 1 && menuitem<=4) { page=2; } else if (page == 2) { page=1; } } } void drawMenu() { if (page==1) { display.setTextSize(1); display.clearDisplay(); display.setTextColor(BLACK, WHITE); display.setCursor(15, 0); display.print("MAIN MENU"); display.drawFastHLine(0,10,83,BLACK); if(menuitem==1 && frame ==1) { displayMenuItem(menuItem1, 15,true); displayMenuItem(menuItem2, 25,false); displayMenuItem(menuItem3, 35,false); } else if(menuitem == 2 && frame == 1) { displayMenuItem(menuItem1, 15,false); displayMenuItem(menuItem2, 25,true); displayMenuItem(menuItem3, 35,false); } else if(menuitem == 3 && frame == 1) { displayMenuItem(menuItem1, 15,false); displayMenuItem(menuItem2, 25,false); displayMenuItem(menuItem3, 35,true); } else if(menuitem == 4 && frame == 2) { displayMenuItem(menuItem2, 15,false); displayMenuItem(menuItem3, 25,false); displayMenuItem(menuItem4, 35,true); } else if(menuitem == 3 && frame == 2) { displayMenuItem(menuItem2, 15,false); displayMenuItem(menuItem3, 25,true); displayMenuItem(menuItem4, 35,false); } else if(menuitem == 2 && frame == 2) { displayMenuItem(menuItem2, 15,true); displayMenuItem(menuItem3, 25,false); displayMenuItem(menuItem4, 35,false); } else if(menuitem == 5 && frame == 3) { displayMenuItem(menuItem3, 15,false); displayMenuItem(menuItem4, 25,false); displayMenuItem(menuItem5, 35,true); } else if(menuitem == 6 && frame == 4) { displayMenuItem(menuItem4, 15,false); displayMenuItem(menuItem5, 25,false); displayMenuItem(menuItem6, 35,true); } else if(menuitem == 5 && frame == 4) { displayMenuItem(menuItem4, 15,false); displayMenuItem(menuItem5, 25,true); displayMenuItem(menuItem6, 35,false); } else if(menuitem == 4 && frame == 4) { displayMenuItem(menuItem4, 15,true); displayMenuItem(menuItem5, 25,false); displayMenuItem(menuItem6, 35,false); } else if(menuitem == 3 && frame == 3) { displayMenuItem(menuItem3, 15,true); displayMenuItem(menuItem4, 25,false); displayMenuItem(menuItem5, 35,false); } else if(menuitem == 2 && frame == 2) { displayMenuItem(menuItem2, 15,true); displayMenuItem(menuItem3, 25,false); displayMenuItem(menuItem4, 35,false); } else if(menuitem == 4 && frame == 3) { displayMenuItem(menuItem3, 15,false); displayMenuItem(menuItem4, 25,true); displayMenuItem(menuItem5, 35,false); } display.display(); } else if (page==2 && menuitem == 1) { displayIntMenuPage(menuItem1, contrast); } else if (page==2 && menuitem == 2) { displayIntMenuPage(menuItem2, volume); } else if (page==2 && menuitem == 3) { displayStringMenuPage(menuItem3, language[selectedLanguage]); } else if (page==2 && menuitem == 4) { displayStringMenuPage(menuItem4, difficulty[selectedDifficulty]); } else if (page==2 && menuitem == 4) { displayStringMenuPage(menuItem4, difficulty[selectedDifficulty]); } } void resetDefaults() { contrast = 37; volume = 50; selectedLanguage = 0; selectedDifficulty = 0; setContrast(); backlight = true; menuItem5 = "Light: ON"; turnBacklightOn(); } void setContrast() { display.setContrast(contrast); display.display(); } void turnBacklightOn() { digitalWrite(7,LOW); } void turnBacklightOff() { digitalWrite(7,HIGH); } void timerIsr() { encoder->service();
}
void displayIntMenuPage(String menuItem, int value)
{
display.setTextSize(1);
display.clearDisplay();
display.setTextColor(BLACK, WHITE);
display.setCursor(15, 0);
display.print(menuItem);
display.drawFastHLine(0,10,83,BLACK);
display.setCursor(5, 15);
display.print("Value");
display.setTextSize(2);
display.setCursor(5, 25);
display.print(value);
display.setTextSize(2);
display.display();
}
void displayStringMenuPage(String menuItem, String value)
{
display.setTextSize(1);
display.clearDisplay();
display.setTextColor(BLACK, WHITE);
display.setCursor(15, 0);
display.print(menuItem);
display.drawFastHLine(0,10,83,BLACK);
display.setCursor(5, 15);
display.print("Value");
display.setTextSize(2);
display.setCursor(5, 25);
display.print(value);
display.setTextSize(2);
display.display();
}
void displayMenuItem(String item, int position, boolean selected)
{
if(selected)
{
display.setTextColor(WHITE, BLACK);
}else
{
display.setTextColor(BLACK, WHITE);
}
display.setCursor(0, position);
display.print(">"+item);
}
void readRotaryEncoder()
{
value += encoder->getValue();
if (value/2 > last) {
last = value/2;
down = true;
delay(150);
}else if (value/2 <span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span>< last) {
last = value/2;
up = true;
delay(150);
}
}