Diff: Watchdog.h

Revision:

0:664899e0b988

Child:

12:d472f9811262

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Watchdog.h	Sat Jun 30 02:03:51 2012 +0000
@@ -0,0 +1,28 @@
+#ifndef MB_Watchdog
+#define MB_Watchdog
+
+// Simon's Watchdog code from
+// http://mbed.org/forum/mbed/topic/508/
+namespace Watchdog {
+    
+    // "kick" or "feed" the dog - reset the watchdog timer
+    // by writing this required bit pattern
+    void kick() {
+        LPC_WDT->WDFEED = 0xAA;
+        LPC_WDT->WDFEED = 0x55;
+    }
+    
+    // Load timeout value in watchdog timer and enable
+    void kick(const float s) {
+        LPC_WDT->WDCLKSEL = 0x1;                // Set CLK src to PCLK
+        // WD has a fixed /4 prescaler, PCLK default is /4
+        static const float clk = static_cast<float>(SystemCoreClock / 16);
+        LPC_WDT->WDTC = s * clk;
+        LPC_WDT->WDMOD = 0x3;                   // Enabled and Reset
+        kick();
+    }
+ 
+};
+
+
+#endif // MB_Watchdog