main.cpp

00001 #include "mbed.h"
00002 #include "rtos.h"
00003 
00004 #define RED_OFF    1
00005 #define YELLOW_OFF 2
00006 #define GREEN_OFF  4
00007 #define ALL_OFF    7
00008 
00009 //Function declarations
00010 void Function1(void const *args);
00011 void Function2(void const *args);
00012 void Function3(void const *args);
00013 void Function4(void const *args);
00014 
00015 //I/O
00016 DigitalOut onBoardLED(LED1);
00017 DigitalOut redLED(D7);
00018 DigitalOut yellowLED(D6);
00019 DigitalOut greenLED(D5);
00020 
00021 DigitalIn  onBoardSwitch(USER_BUTTON);
00022 DigitalIn  SW1(D4);
00023 DigitalIn  SW2(D3);
00024 
00025 Thread* t1;
00026 Thread* t2;
00027 Thread* t3;
00028 Thread* t4;
00029 
00030 //Thread ID
00031 osThreadId idMain;
00032 osThreadId id1;
00033 osThreadId id2;
00034 osThreadId id3;
00035 osThreadId id4;
00036 
00037 void Function1(void const *args)
00038 {
00039     while (true) {
00040         redLED = !redLED;
00041         if (redLED == 0) {
00042             t2->signal_set(RED_OFF);
00043         }
00044         Thread::wait(1000);
00045     }
00046 }
00047 
00048 void Function2(void const *args)
00049 {
00050     while (true) {
00051         Thread::signal_wait(RED_OFF);
00052         yellowLED = !yellowLED;
00053         if (yellowLED == 0) {
00054             t3->signal_set(YELLOW_OFF);
00055         }
00056     }
00057 }
00058 
00059 //Green Flashing
00060 void Function3(void const *args)
00061 {
00062     while (true) {
00063         Thread::signal_wait(YELLOW_OFF);
00064         greenLED = !greenLED;
00065         if (greenLED == 0) {
00066             t4->signal_set(GREEN_OFF);
00067         }       
00068     }
00069 }
00070 
00071 //This function waits for signals from all other threads
00072 void Function4(void const *args)
00073 {
00074     while (true) {
00075         Thread::signal_wait(GREEN_OFF);
00076         //Signal main thread       
00077         osSignalSet(idMain, ALL_OFF);              
00078     }
00079 }
00080 
00081 //Main thread
00082 int main() {
00083     redLED    = 0;
00084     yellowLED = 0;
00085     greenLED  = 0;
00086     
00087     //Main thread ID
00088     idMain = osThreadGetId();   //CMSIS RTOS call
00089     
00090     //Create and run threads
00091     t4 = new Thread(Function4);
00092     t1 = new Thread(Function1);           
00093     t2 = new Thread(Function2);    
00094     t3 = new Thread(Function3);     //Dynamically allocated
00095 
00096     
00097     //Thread ID
00098     id1 = t1->gettid();
00099     id2 = t2->gettid();
00100     id3 = t3->gettid();
00101     id4 = t4->gettid();
00102     
00103     while(1) {
00104         //Wait for the ALL_ON signal
00105         osSignalWait(ALL_OFF,osWaitForever);
00106         printf("ALL OFF\n");
00107     }
00108 }