Diff: WatchDog.cpp

Revision:

0:bbc789f8d849

Child:

2:a6661a79bf7b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WatchDog.cpp	Sun Jul 01 22:43:25 2012 +0000
@@ -0,0 +1,97 @@
+/*
+*           Source code is free to use and distribute. 
+*           Software originally written by Simon Ford, 
+*           altered by Lerche. 
+*
+*           02-07-2012 - Added LPC11U24 Watchdog functions. Lerche
+*           
+*/
+
+#include "mbed.h"
+#include "WatchDog.h"
+
+
+WatchDog::WatchDog(float s) {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    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;         // Load WD Timer Constant with value determined by float s
+    LPC_WDT->WDMOD = 0x3;                   // Enabled and Reset        
+    feed();    
+#elif defined(TARGET_LPC11U24)
+    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;
+    LPC_WWDT->MOD = 0x3;
+    feed();
+#endif
+}
+
+WatchDog_ms::WatchDog_ms(int ms) {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    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 = ((float)ms * (float)clk) /1000;     // Load WD Timer Constant with value determined by int ms    
+    LPC_WDT->WDMOD = 0x3;                               // Enabled and Reset        
+    feed();
+#elif defined(TARGET_LPC11U24)
+    LPC_SYSCON->SYSAHBCLKCTRL |= 0x8000;
+    LPC_SYSCON->PDRUNCFG &= 0xFFBF;
+    LPC_SYSCON->WDTOSCCTRL = 0x40;
+    uint32_t clk = 100000;
+    LPC_WWDT->TC = ((float)ms * (float)clk) / 1000;    
+    LPC_WWDT->CLKSEL = 0x1;
+    LPC_WWDT->MOD = 0x3;
+    feed();
+#endif    
+}
+
+WatchDog_us::WatchDog_us(int us) {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    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 = ((float)us * (float)clk) /1000000;  // Load WD Timer Constant with value determined by int us       
+    LPC_WDT->WDMOD = 0x3;                               // Enabled and Reset        
+    feed();
+#elif defined(TARGET_LPC11U24)
+    LPC_SYSCON->SYSAHBCLKCTRL |= 0x8000;
+    LPC_SYSCON->PDRUNCFG &= 0xFFBF;
+    LPC_SYSCON->WDTOSCCTRL = 0x40;
+    uint32_t clk = 100000;
+    LPC_WWDT->TC = ((float)us * (float)clk) / 1000000;    
+    LPC_WWDT->CLKSEL = 0x1;
+    LPC_WWDT->MOD = 0x3;
+    feed();
+#endif   
+}
+
+void WatchDog::feed() {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    LPC_WDT->WDFEED = 0xAA;         // Routine to feed the WatchDog
+    LPC_WDT->WDFEED = 0x55;         // according to user manual 
+#elif defined(TARGET_LPC11U24)
+    LPC_WWDT->FEED = 0xAA;
+    LPC_WWDT->FEED = 0x55;
+#endif    
+}
+void WatchDog_ms::feed() {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    LPC_WDT->WDFEED = 0xAA;         // Routine to feed the WatchDog
+    LPC_WDT->WDFEED = 0x55;         // according to user manual
+#elif defined(TARGET_LPC11U24)
+    LPC_WWDT->FEED = 0xAA;
+    LPC_WWDT->FEED = 0x55;
+#endif    
+}
+void WatchDog_us::feed() {
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
+    LPC_WDT->WDFEED = 0xAA;         // Routine to feed the WatchDog
+    LPC_WDT->WDFEED = 0x55;         // according to user manual
+#elif defined(TARGET_LPC11U24)
+    LPC_WWDT->FEED = 0xAA;
+    LPC_WWDT->FEED = 0x55;
+#endif    
+}