Kinan S / Watchdog

Added definition for LCP11u24 and LCP11u24

Fork of Watchdog by David Smart

I added support for LPC11U24, ARCH GPRS and ARCH GPRS V2

Files at this revision

API Documentation at this revision

Revision 7:00706eb585ce, committed 2015-03-17

Comitter:
kinan
Date:
Tue Mar 17 18:12:08 2015 +0000
Parent:
6:e0f547e22dd5
Commit message:
Added a watchdog

Changed in this revision

Watchdog.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r e0f547e22dd5 -r 00706eb585ce Watchdog.cpp
--- a/Watchdog.cpp	Mon Mar 16 01:04:32 2015 +0000
+++ b/Watchdog.cpp	Tue Mar 17 18:12:08 2015 +0000
@@ -41,6 +41,36 @@
 bool Watchdog::WatchdogCausedReset() {
     return wdreset;
 }
+#elif defined(TARGET_ARCH_GPRS) || defined(TARGET_LPC11U24)
+/// Watchdog gets instantiated at the module level
+Watchdog::Watchdog() {
+    wdreset = (LPC_WWDT->MOD >> 2) & 1;    // capture the cause of the previous reset
+}
+
+void Watchdog::Configure(float s) {
+    LPC_SYSCON->SYSAHBCLKCTRL |= 0x8000;
+    LPC_SYSCON->PDRUNCFG &= 0xFFBF;
+    LPC_SYSCON->WDTOSCCTRL = 0x40;
+    
+    uint32_t clk = 100000;
+    LPC_WWDT->TC = s * (float)clk;
+    
+    LPC_WWDT->CLKSEL = 0x1;                // Set CLK src to PCLK    
+    LPC_WWDT->MOD = 0x3;                   // Enabled and Reset
+    Service();
+}
+
+/// "Service", "kick" or "feed" the dog - reset the watchdog timer
+/// by writing this required bit pattern
+void Watchdog::Service() {
+    LPC_WWDT->FEED = 0xAA;
+    LPC_WWDT->FEED = 0x55;
+}
+
+/// get the flag to indicate if the watchdog causes the reset
+bool Watchdog::WatchdogCausedReset() {
+    return wdreset;
+}
 #elif defined( TARGET_LPC4088 )
 // from Gesotec Gesotec
 /// Watchdog gets instantiated at the module level