Merge pull request #5 from SauleVire/patch-1

Create lcd_nav_keypad

Author: jonblack

examples/lcd_nav_keypad/lcd_nav_keypad.ino

@@ -0,0 +1,194 @@
+/*
+  LCDNav.ino - Example code using the menu system library
+ and a lcd 16x2 display (controled over serial).
+ 
+ Created by Niesteszeck, Dec 1th 2013.
+ Released into the public domain.
+ 
+ License: GPL 3
+ */
+
+#include <MenuSystem.h>
+#include <LiquidCrystal.h>
+
+//#define DEBUG
+#define NUM_KEYS 5
+#define Key_Pin 0 // LCD key pad analog pin
+int adc_key_val[5] ={50,200,400,600,800};
+int adc_key_in;
+int key=-1;
+int oldkey=-1;
+
+// Menu variables
+MenuSystem ms;
+Menu mm("ROOT Menu Title");
+MenuItem mm_mi1("Level1- Item1 (Item)");
+MenuItem mm_mi2("Level1- Item2 (Item)");
+Menu mu1("Level1- Item3 (Menu)");
+MenuItem mu1_mi1("Level2- Item1 (Item)");
+
+/*
+The LCD circuit:
+ * LCD RS pin to digital pin 8
+ * LCD Enable pin to digital pin 9
+ * LCD D4 pin to digital pin 4
+ * LCD D5 pin to digital pin 5
+ * LCD D6 pin to digital pin 6
+ * LCD D7 pin to digital pin 7
+ * LCD R/W pin to ground
+ */
+// initialize the library with the numbers of the interface pins
+LiquidCrystal lcd(26, 24, 22, 23, 25, 27, 29);
+// Menu callback function
+// In this example all menu items use the same callback.
+
+void on_item1_selected(MenuItem* p_menu_item)
+{
+  lcd.setCursor(0,2);
+  lcd.print("Item1 Selected  ");
+  delay(1500); // so we can look the result on the LCD
+}
+
+void on_item2_selected(MenuItem* p_menu_item)
+{
+  lcd.setCursor(0,2);
+  lcd.print("Item2 Selected  ");
+  delay(1500); // so we can look the result on the LCD
+}
+
+void on_item3_selected(MenuItem* p_menu_item)
+{
+  lcd.setCursor(0,2);
+  lcd.print("Item3 Selected  ");
+  delay(1500); // so we can look the result on the LCD
+}
+
+// Standard arduino functions
+
+void setup()
+{
+  Serial.begin(9600);
+  lcd.begin(20, 4);
+  
+  serialPrintHelp();
+  Serial.println("Setting up the menu.");
+  // Menu setup
+  /*
+  Menu Structure:
+   -Item1
+   -Item2
+   -Item3
+   --Item1
+   
+   */
+  mm.add_item(&mm_mi1, &on_item1_selected);
+  mm.add_item(&mm_mi2, &on_item2_selected);
+  mm.add_menu(&mu1);
+  mu1.add_item(&mu1_mi1, &on_item3_selected);
+  ms.set_root_menu(&mm);
+  Serial.println("Menu setted.");
+  displayMenu();
+}
+
+void loop()
+{
+  
+  
+  
+  // Handle serial commands
+  serialHandler();
+
+  // Wait for two seconds so the output is viewable
+//  delay(2000);
+}
+
+void displayMenu() {
+  lcd.clear();
+  lcd.setCursor(0,0);
+  // Display the menu
+  Menu const* cp_menu = ms.get_current_menu();
+
+  //lcd.print("Current menu name: ");
+  lcd.print(cp_menu->get_name());
+  
+  lcd.setCursor(0,1);
+  
+  lcd.print(cp_menu->get_selected()->get_name());
+}
+
+void serialHandler() {
+    //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  adc_key_in = analogRead(Key_Pin);    // Read the value of the pulsation
+  key = get_key(adc_key_in);    // We get the button pressed
+
+  if (key != oldkey)   // if keypress is detected
+  {
+    delay(50);  // Expected to avoid bouncing pulsations
+    adc_key_in = analogRead(Key_Pin);    // Read the value of the pulsation
+    key = get_key(adc_key_in);    // We get the button pressed
+//    if (key != oldkey) 
+  oldkey = key;
+  //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+
+if (key == 1){
+      ms.prev();
+      displayMenu();
+      #ifdef DEBUG
+      Serial.print("key- ");Serial.println(key);
+      #endif
+}
+if (key == 2)   { 
+      ms.next();
+      displayMenu();
+#ifdef DEBUG
+      Serial.print("key- ");Serial.println(key);
+      #endif
+}
+if (key == 3){
+      ms.back();
+      displayMenu();
+#ifdef DEBUG
+      Serial.print("key- ");Serial.println(key);
+      #endif
+}
+if (key == 4)
+      ms.select();
+      displayMenu();
+#ifdef DEBUG
+      Serial.print("key- ");Serial.println(key);
+      #endif
+}
+if (key == 0)
+      serialPrintHelp();
+#ifdef DEBUG
+      Serial.print("key- ");Serial.println(key);
+      #endif
+}
+
+
+
+
+//}
+void serialPrintHelp() {
+  Serial.println("***************");
+  Serial.println("w: go to previus item (up)");
+  Serial.println("s: go to next item (down)");
+  Serial.println("a: go back (right)");
+  Serial.println("d: select \"selected\" item");
+  Serial.println("?: print this help");
+  Serial.println("h: print this help");
+  Serial.println("***************");
+
+}
+// Convert the analog value read in a number of button pressed
+int get_key(unsigned int input) {
+  int k;
+  for (k = 0; k < NUM_KEYS; k++)  {
+    if (input < adc_key_val[k])    {
+      return k;
+    }
+  }
+  if (k >= NUM_KEYS) k = -1;  // Error in reading.
+  return k;
+}