init

Author: doncov.eugene

examples/multi_desktop_serial.cpp

@@ -0,0 +1,89 @@
+#include "Arduino.h"
+#include "stdlib.h"
+
+#include "multi_desktop.h"
+
+#define LED_WORK 3
+#define BUTTON_1 4   
+#define BUTTON_2 5  
+
+
+void print(const char *buffer, int ms)
+{
+	Serial.println(buffer); delay(ms);
+}
+
+void up() { print("up pressed", 1000);  }
+
+void down() { print("down pressed", 1000); }
+
+void led_button() { digitalWrite(LED_WORK, !digitalRead(LED_WORK)); }
+
+void menu_button() { print("MENU", 1000); }
+
+void show_1_screen() 
+{
+	print("MAIN DESKTOP", 0);
+	print("[ + ]  [ - ]   [ * D2]", 0);
+}
+
+void show_2_screen()
+{
+	digitalRead(LED_WORK) ? print("LED on", 0) : print("LED off", 0);
+	print("[ + LED]   [ * D3]", 0);
+}
+
+void show_3_screen()
+{
+	print("LAST DESKTOP", 0);
+	print("[ + MENU]   [ * D1]", 0);
+}
+
+
+#define BUTTONS 2
+int8_t codes[] = { '+' , '-' };
+
+func desktop1cb[] = { &up, &down };
+func desktop2cb[] = { &led_button, 0 };
+func desktop3cb[] = { &menu_button, 0 };
+
+MultiDesktop<BUTTONS> multi_desktop( '*' , codes);
+Desktop<BUTTONS> mainDesktop(&show_1_screen, desktop1cb); 
+Desktop<BUTTONS> secondDesktop(&show_2_screen, desktop2cb);
+Desktop<BUTTONS> thirdDesktop(&show_3_screen, desktop3cb);
+
+
+void setup()
+{
+	pinMode(LED_WORK, OUTPUT);
+	pinMode(BUTTON_1,INPUT);
+	pinMode(BUTTON_2,INPUT); 
+	
+	digitalWrite(LED_WORK, LOW);
+	
+	Serial.begin(9600);
+	
+	print("HELLO", 500);
+	
+	multi_desktop.add_desktop(&mainDesktop);
+	multi_desktop.add_desktop(&secondDesktop);
+	multi_desktop.add_desktop(&thirdDesktop);
+	
+	multi_desktop.show();
+}
+
+void loop() 
+{	
+	if (Serial.available()) 
+	{
+        char ch = Serial.read();
+		
+		multi_desktop.button_pressed(ch);
+		
+		multi_desktop.show();  // comfort if Serial print
+    }
+	
+	//multi_desktop.show();  // if using LCD or show changed data
+	
+	delay(1); // delay in between reads for stability
+}

img/main.png

@@ -0,0 +1,125 @@
+
+#ifndef MULTI_DESKTOP_H
+#define MULTI_DESKTOP_H
+
+extern "C" {
+  typedef void (*func)(void);
+}
+
+/**
+@brief Desktop class
+@param show_ - callback function when this Desktop is active
+@param cb    - callback functions for all N buttons. i function called when user press i button.
+*/
+template <int8_t N>  //keys
+class Desktop
+{
+public: 
+	Desktop<N>(func show_, func cb[])
+		: show(show_)
+		, buttons_callbacks(cb)
+		, next(0)
+	{ }
+	
+	/**
+    @brief callback function when this Desktop is active
+    */
+	func show;
+	
+	/**
+    @brief link to next Desktop in MultiDesktop configuration
+    */
+	Desktop *next;
+	
+	/**
+    @brief callback functions for all N buttons. i function called when user press i button.
+    */
+	func *buttons_callbacks;
+private:
+};
+
+
+/**
+@brief MultiDesktop class
+You can change Desktops for show different info and call different 
+functions in each of them by pressing same buttons.
+
+@param N         - number of keys you want to use except 'next desktop' key.
+@param next_code - key code for go to next Desktop  
+@param codes     - N key codes you want to press
+*/
+template <int8_t N> 
+class MultiDesktop
+{
+public:
+	MultiDesktop<N>(int8_t next_code, int8_t codes[])
+		: current(0)
+		, first(0)
+		, key_codes(codes)
+		, next_desktop_code(next_code)
+	{}
+	
+	/**
+	@brief add_desktop add new Desktop. Desktops are 1-direction looped list.
+	@param new_d     - link to new Desktop
+	*/
+	void add_desktop(Desktop<N> *new_d)
+	{
+		if (!first)
+		{
+			first = new_d;
+			current = new_d;
+		}
+		else
+		{
+			Desktop<N> *d = first;
+            while (d->next && d->next != first) 
+				d = d->next;
+			
+			d->next = new_d;
+			new_d->next = first;
+		}
+	}
+	
+	/**
+	@brief call this function when user press button. call show() to redraw screen.
+	@param code     - button code
+	*/
+	void button_pressed(int8_t code)
+	{
+		if (next_desktop_code == code)
+		{
+			if (current->next)
+				current = current->next;
+		}
+		else
+		{
+			for (int8_t i=0; i < N; i++)
+			{
+				if (key_codes[i] == code)
+				{
+					if (current->buttons_callbacks[i])
+						current->buttons_callbacks[i]();
+				}
+			}
+		}
+	}
+	
+	/**
+	@brief call show function of current desktop
+	*/
+	void show()
+	{
+		if (current->show)
+			current->show();
+	}
+	
+private:
+	Desktop<N> *current;
+	Desktop<N> *first;
+	
+	int8_t next_desktop_code;
+	int8_t *key_codes;
+};
+
+#endif