Diff: watchdog.h

Revision:

76:b07effe83fb8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/watchdog.h	Wed Feb 25 10:06:11 2015 +0000
@@ -0,0 +1,22 @@
+#ifndef WATCHDOG_H
+#define WATCHDOG_H
+#include "mbed.h"
+
+class Watchdog {
+public:
+// Load timeout value in watchdog timer and enable
+    void kick(float s) {
+        LPC_WDT->WDCLKSEL = 0x1;                // Set CLK src to PCLK
+        uint32_t clk = SystemCoreClock / 16;    // WD has a fixed /4 prescaler, PCLK default is /4
+        LPC_WDT->WDTC = s * (float)clk;
+        LPC_WDT->WDMOD = 0x3;                   // Enabled and Reset
+        kick();
+    }
+// "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;
+    }
+};
+#endif /* WATCHDOG_H */
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