Diff: main.cpp

Revision:

0:f916cefba2f4

Child:

1:4fb27aea76b2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 08 11:43:39 2016 +0000
@@ -0,0 +1,106 @@
+#include "mbed.h"
+#include "rtos.h"
+
+#define RED_DONE 1
+#define YELLOW_DONE 2
+
+
+//Function declarations
+void countUP(void const *args);
+void countDOWN(void const *args);
+
+//Digital outputs
+DigitalOut onBoardLED(LED1);
+DigitalOut redLED(D7);
+DigitalOut yellowLED(D6);
+DigitalOut greenLED(D5);
+
+//Digital inputs
+DigitalIn  onBoardSwitch(USER_BUTTON);
+DigitalIn  SW1(D4);
+DigitalIn  SW2(D3);
+
+//Thread object references
+Thread* t1;
+Thread* t2;
+
+//Thread ID for the Main function (CMSIS API)
+osThreadId tidMain;
+
+//Stared mutable state
+volatile long long count = 0;
+
+//Threads
+void countUP(void const *args)
+{
+    redLED = 1;
+    
+    for (unsigned int n=0; n<10000; n++) {
+        count++;
+        count++;        
+        count++;
+        count++;    
+        count++;
+        count++; 
+        count++;
+        count++;
+        count++;
+        count++;   
+    }
+    
+    redLED = 0;
+    osSignalSet(tidMain, RED_DONE);  //Signal main thread we are done
+}
+
+void countDOWN(void const *args)
+{
+    yellowLED = 1;
+    
+    for (unsigned int n=0; n<10000; n++) {
+        count--;
+        count--;        
+        count--;
+        count--;    
+        count--;
+        count--; 
+        count--;
+        count--;
+        count--;
+        count--;               
+    }   
+    
+    osSignalSet(tidMain, YELLOW_DONE); //Signal main thread we are done
+    yellowLED = 0;
+}
+
+
+//Main thread
+int main() {
+    redLED    = 0;
+    yellowLED = 0;
+    greenLED  = 1;
+    
+    //Main thread ID
+    tidMain = Thread::gettid();  
+    
+    //Press the switch to run concurrently
+    if (onBoardSwitch == 1) {
+        printf("Running sequntially\n");
+        countUP(NULL);
+        countDOWN(NULL);        
+    } else {
+        printf("Running concurrently\n");
+        Thread t1(countUP);           
+        Thread t2(countDOWN);    
+  
+        //Wait for the ALL_ON signal
+        Thread::signal_wait(RED_DONE,osWaitForever);
+        Thread::signal_wait(YELLOW_DONE,osWaitForever);        
+    }
+
+    printf("Final result = %lld\n", count);
+    if (count == 0) {
+        greenLED = 0;
+    }
+    while(true);
+}