main.cpp

00001 #include "mbed.h"
00002 
00003 #define RED_TOGGLE    1
00004 #define YELLOW_TOGGLE 2
00005 #define GREEN_TOGGLE  4
00006 
00007 //Function declarations
00008 void FunctionRed();
00009 void FunctionYellow();
00010 void FunctionGreen();
00011 
00012 //I/O
00013 DigitalOut onBoardLED(LED1);
00014 DigitalOut redLED(D7);
00015 DigitalOut yellowLED(D6);
00016 DigitalOut greenLED(D5);
00017 
00018 DigitalIn  onBoardSwitch(USER_BUTTON);
00019 DigitalIn  SW1(D4);
00020 DigitalIn  SW2(D3);
00021 
00022 
00023 //Each of the following 3 functions is listening for a signal
00024 void FunctionRed()
00025 {
00026     while (true) {
00027         Thread::signal_wait(RED_TOGGLE);  
00028         redLED = !redLED;                   
00029     }
00030 }
00031 
00032 void FunctionYellow()
00033 {
00034     while (true) {
00035         Thread::signal_wait(YELLOW_TOGGLE);
00036         yellowLED = !yellowLED;
00037     }
00038 }
00039 
00040 void FunctionGreen()
00041 {
00042     while (true) {
00043         Thread::signal_wait(GREEN_TOGGLE);
00044         greenLED = !greenLED;
00045     }
00046 }
00047 
00048 //Main thread
00049 int main() {
00050     redLED    = 0;
00051     yellowLED = 0;
00052     greenLED  = 0;
00053         
00054     //Create threads
00055     Thread t1;           
00056     Thread t2;    
00057     Thread t3;   
00058     
00059     //Start threads
00060     t1.start(FunctionRed);           
00061     t2.start(FunctionYellow);    
00062     t3.start(FunctionGreen);      
00063     
00064     //Main loop
00065     while(1) {
00066         
00067         //Read stdin (serial port)
00068         int selection, hits;
00069         char strInput[64];
00070         do {
00071             puts("Please choose:");
00072             puts("1 - Red");
00073             puts("2 - Yellow");
00074             puts("3 - Green");            
00075             scanf("%64s", strInput);                    //Read a string
00076             hits = sscanf(strInput, "%d", &selection);  //Look for an integer
00077         } while (hits != 1);                            //Repeat if not found
00078         
00079         //Signal the thread
00080         switch (selection) {
00081         case 1:
00082             //Signal thread 1
00083             t1.signal_set(RED_TOGGLE);
00084             break;
00085         case 2:
00086             //Signal thread 2
00087             t2.signal_set(YELLOW_TOGGLE);
00088             break;
00089         case 3:
00090             //Signal thread 3
00091             t3.signal_set(GREEN_TOGGLE);
00092             break;
00093         default:
00094             puts("Invalid option");
00095             break;
00096         } //end switch
00097         
00098     } //end while
00099 } //end main