Diff: WatchdogThread.cpp

Revision:

0:a355e511bc5d

Child:

8:a0890fa79084

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WatchdogThread.cpp	Thu Feb 01 03:58:00 2018 +0000
@@ -0,0 +1,85 @@
+#include "mbed.h"
+
+osThreadId WatchdogId;
+osTimerId oneShot;
+
+
+// Function prototypes
+void WatchdogISR(void const *n);
+void WatchdogThread(void const *argument);
+
+// Declare WatchdogThread as a thread/process
+osTimerDef(Wdtimer, WatchdogISR); 
+
+/******************************************************************************/
+//  osPriorityIdle          = -3,          ///< priority: idle (lowest)
+//  osPriorityLow           = -2,          ///< priority: low
+//  osPriorityBelowNormal   = -1,          ///< priority: below normal
+//  osPriorityNormal        =  0,          ///< priority: normal (default)
+//  osPriorityAboveNormal   = +1,          ///< priority: above normal
+//  osPriorityHigh          = +2,          ///< priority: high
+//  osPriorityRealtime      = +3,          ///< priority: realtime (highest)
+/******************************************************************************/
+
+// Declare WatchdogThread as a thread/process
+osThreadDef(WatchdogThread, osPriorityRealtime, 1024); 
+
+DigitalOut led1(LED1);
+
+
+bool WatchdogThreadInit()
+{
+    bool retval;
+    
+    WatchdogId = osThreadCreate(osThread(WatchdogThread), NULL);
+    
+    if(WatchdogId)
+    {
+        // Start the watch dog timer and enable the watch dog interrupt
+        oneShot = osTimerCreate(osTimer(Wdtimer), osTimerOnce, (void *)0);
+        retval = true;
+    }
+    else
+    {
+        retval = false;
+    }
+    
+    return retval;
+    
+}
+
+
+/*******************************************************************************
+*                       ******** Watchdog Reset ********
+*******************************************************************************/
+void WatchdogReset(void)
+{
+    led1=0; // Turn LED off.
+    // Start or restart the watchdog timer interrupt and set to  2000ms.
+    osTimerStart(oneShot, 2000); 
+}
+
+        
+/*******************************************************************************
+*                       ******** Watchdog Thread ********
+*******************************************************************************/
+static void WatchdogThread(void const *argument)
+{
+    while (true) 
+    {
+        // Go to sleep until a signal, SignalWatchdog, is received
+        osSignalWait(0x01, osWaitForever); 
+        led1 = 1;
+    }
+
+}
+
+
+/*******************************************************************************
+*                  ******** Watchdog Interrupt Handler ********
+*******************************************************************************/
+void WatchdogISR(void const *n)
+{
+    // Send signal to thread with ID, WatchdogId, i.e., WatchdogThread
+    osSignalSet(WatchdogId,0x01); 
+}