Diff: main.cpp

Revision:

0:f6684fa81520

diff -r 000000000000 -r f6684fa81520 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Apr 21 14:38:29 2012 +0000
@@ -0,0 +1,53 @@
+#include "mbed.h"
+
+DigitalOut led(LED1);
+
+class Watchdog {
+public:
+    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 = (LPC_WDT->WDMOD|0x3);                   // Enabled and Reset, without clear WD time-out flag.        
+        kick();
+    }
+    
+    void kick() {
+        LPC_WDT->WDFEED = 0xAA;
+        LPC_WDT->WDFEED = 0x55;
+    }
+    
+    /* You only can do IsWatchdogReset once... because flag must be cleared. */
+    bool IsWatchdogReset() {
+    	if (LPC_WDT->WDMOD & 0x4) {
+		    LPC_WDT->WDMOD=(LPC_WDT->WDMOD&(~0x4)); /* Clear timeout flag. */
+		    return true;
+    	}
+	    else return false;
+    }
+};
+
+Watchdog w;
+
+int main() {
+    /* First activate WD */
+    w.kick(2.5);
+    
+    printf("Hello World!\n");
+    
+    if (w.IsWatchdogReset()) 
+		printf("MAIN: WD RESET Power up!!\r\n");
+
+    int hang = 0;
+    while(1) {
+        printf("loop...\n");
+        wait(0.1);
+        
+        if(hang == 10) {
+            while(1);
+        }
+
+        w.kick();
+        hang++;
+    }
+}