Diff: main.cpp

Revision:

6:f375c710bd0e

Parent:

3:32a940251192

--- a/main.cpp	Tue Feb 27 10:29:30 2018 +0000
+++ b/main.cpp	Fri Mar 09 22:58:48 2018 +0000
@@ -1,63 +1,54 @@
 #include "mbed.h"
-#include "rtos.h"
+//#include "rtos.h"
 #include "wdt.h"
-
 // Sample program using the Watchdog
 // ---------------------------------
 //    * Three threads co-operate to flash two LEDs
 //    * A simple way to inject a fault, by pressing a button 
 //    * The watchdog is configured with a 32ms timeout
-
 #define ON 1
 #define OFF 0
 DigitalOut led_red(LED_RED, ON);
+DigitalOut led_blue(LED_BLUE, ON);
+DigitalOut led_green(LED_GREEN, ON);
 DigitalIn button(PTD0, PullUp);
 DigitalOut led1(PTC12, OFF);
 DigitalOut led2(PTC13, OFF);
-
+Serial pc(USBTX, USBRX);
 // This ticker is used to feed the watch dog
 Ticker tick;
+// Threads
+Thread threadT; // timer thread 
+Thread threadLED1; // thread LED1
+Thread circuitfailure;
+AnalogIn ain(A0);
 
-// Threads
-Thread threadT ; // timer thread 
-Thread threadLED1 ; // thread LED1
-Thread threadLED2 ; // thread LED2
+float volts;
 
 // ------------Fault Injection Button-------------
 //  Wait while the button is down
 //     Use this to simulate a STUCK fault
 // -----------------------------------------------
 void waitButton() {
-    while (!button) ;  
+   
+    while (!button);
 }
-
 // ---Thread for controlling LED 1----------------
 //   Turn LED1 on/off in response to signals 
 // -----------------------------------------------
 void led1_thread() {  // method to run in thread
     osEvent evt ;
     while (true) {
+        wdt_kick_all();
         evt = Thread::signal_wait(0x0); // wait for any signal
         if (evt.status == osEventSignal) {
-            if (evt.value.signals & 0x01) led1 = ON ;
+            if (evt.value.signals & 0x01) 
+            {
+                led1 = ON ;
+                
+            }
             if (evt.value.signals & 0x02) led1 = OFF ;
         } 
-        waitButton() ;  // POSSIBLE FAULT HERE
-    }
-}
-
-// ---Thread for controlling LED 2----------------
-//   Turn LED2 on/off in response to signals 
-// -----------------------------------------------
-void led2_thread() {  // method to run in thread
-    osEvent evt ;
-    while (true) {
-        evt = Thread::signal_wait(0x0); // wait for any signal
-        if (evt.status == osEventSignal) {
-            if (evt.value.signals & 0x01) led2 = ON ;
-            if (evt.value.signals & 0x02) led2 = OFF ;
-        } 
-        // waitButton() ; // POSSIBLE FAULT HERE
     }
 }
 
@@ -67,15 +58,46 @@
 void timer_thread() {  // method to run in thread
     while (true) {
         Thread::wait(250) ;
-        threadLED1.signal_set(0x1) ;
-        threadLED2.signal_set(0x1) ;
+        threadLED1.signal_set(0x1) ;//on
         Thread::wait(250) ;
-        threadLED1.signal_set(0x2) ;
-        threadLED2.signal_set(0x2) ;
-        // waitButton() ; // POSSIBLE FAULT HERE
+        threadLED1.signal_set(0x2) ;//off
     }
 }
-
+void failed_circuit() 
+{ 
+    int counter=0;
+    while (true) 
+    {
+        volts = ain*3.3;
+        if (volts>3) 
+        {if(led_blue==1) {
+            pc.printf("Warning: Short Circuit\n\r");
+           led_green=0;}}//turn on the green LED
+        
+        else
+        {
+           if(led1==1)
+           {
+                if (volts<0.1)        
+                {    
+                    counter++;
+                    if (counter>10)
+                    { if(led_green==1){
+                         pc.printf("Warning: Open Circuit\n\r");
+                       led_blue=0;}//turn on the blue LED
+                        counter =0;
+                    }
+                }
+               else
+                { if(led_blue==1 && led_green==1){
+                    pc.printf("%f volts\n\r",volts);}
+                } 
+            }
+        }
+ 
+       waitButton(); // POSSIBLE FAULT HERE     
+    }     
+}
 // -----------MAIN-------------------------------
 //    Configure watchdog. Start threads. 
 //    Show start up with RED for 1sec
@@ -85,16 +107,17 @@
 // ----------------------------------------------
 
 int main(void) {
-    wdt_32ms() ; // initialise watchdog - 32ms timeout
-    tick.attach_us(callback(&wdt_kick_all), 20000); // ticks every 20ms    
+    
+    wdt_1sec() ; // initialise watchdog - 32ms timeout
     
     // start threads
     threadT.start(&timer_thread) ; // start the timer thread 
     threadLED1.start(&led1_thread) ; // start the LED1 control thread 
-    threadLED2.start(&led2_thread) ; // start the LED2 control thread 
+    circuitfailure.start(&failed_circuit);
     
     // show start-up
     led_red = OFF;
-    Thread::wait(1000) ;
+    Thread::wait(1000) ;//1ms
     led_red = ON;
+   
 }
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