Merge pull request #73 from msh2050/master

Add analog_keyboard example

Author: neu-rah

examples/analog_keyboard/analog_keyboard.ino

@@ -0,0 +1,105 @@
+ // this example will just show how to use analog keyboard with the menu
+ // depend on https://github.com/neu-rah/ArduinoMenu/issues/17
+ // the used keyboard is: https://www.dfrobot.com/wiki/index.php/Arduino_LCD_KeyPad_Shield_(SKU:_DFR0009)
+ // you have to change your analog data according to your keyboadr
+ 
+#include <menu.h>//menu macros and objects
+#include <genericKeyboard.h>
+#include <chainStream.h>
+#include <LiquidCrystal.h>
+#include <menuLCD.h>
+
+
+
+
+
+#define btnRIGHT  menu::enterCode
+#define btnUP     menu::downCode
+#define btnDOWN   menu::upCode
+#define btnLEFT   menu::escCode
+#define btnENTER  menu::enterCode
+#define btnNONE   -1
+
+genericKeyboard mykb(read_keyboard);
+//alternative to previous but now we can input from Serial too...
+//Stream* in2[]={&mykb,&Serial};
+//chainStream<2> allIn(in2);
+Stream* in2[] = { &mykb };
+chainStream<1> allIn(in2);
+
+//set the pin and the lcd
+LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
+menuLCD menu_lcd(lcd, 16, 2);//menu output device
+
+//this is a simple menu just to test the keyboard check othe eample to extend it.
+
+MENU(mainMenu, "Main menu",
+	OP("LED On", menu::nothing),
+	OP("LED Off", menu::nothing),
+	OP("Empty 1", menu::nothing),
+	OP("Empty 2", menu::nothing),
+	OP("Empty 3", menu::nothing),
+	OP("Empty 4", menu::nothing),
+	OP("Empty 5...", menu::nothing)
+);
+
+
+
+int old_button = 0;
+
+int read_keyboard() {
+	int button, button2, pressed_button;
+	button = getButton();
+	if (button != old_button) {
+		delay(50);        // debounce
+		button2 = getButton();
+
+		if (button == button2) {
+			old_button = button;
+			pressed_button = button;
+			if (button != 0) {
+				//Serial.println(button); 
+				if (button == 1) return btnLEFT;
+				if (button == 2) return btnUP;
+				if (button == 3) return btnDOWN;
+				if (button == 4) return btnRIGHT;
+				if (button == 5) return btnENTER;
+			}
+		}
+	}
+	else {
+		return btnNONE;
+	}
+}
+
+int getButton() {
+	int i, z, button;
+	int sum = 0;
+
+	for (i = 0; i < 4; i++) {
+		sum += analogRead(0);
+	}
+	z = sum / 4;
+  // change this numbers according to your keyboard.
+	if (z > 1000) button = 0;
+	else if (z >= 0 && z < 50) button = 1; //LEFT                    
+	else if (z > 120 && z < 155) button = 2; //UP                
+	else if (z > 292 && z < 335) button = 3; //DOWN                
+	else if (z > 460 && z < 515) button = 4; //RIGHT           
+	else if (z > 650 && z < 745) button = 5; //ENTER
+	else button = 0;
+	//{ 0, 128, 302, 474, 718 }
+	return button;
+}
+
+
+void setup() {
+
+}
+
+void loop() {
+
+	mainMenu.poll(menu_lcd, allIn);
+	delay(50);
+
+}