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Dependencies:   C027_Support C12832 LM75B MMA7660 MbedSmartRest mbed-rtos mbed

Fork of MbedSmartRestMain by Vincent Wochnik

watchdog.h@76:b07effe83fb8, 2015-02-25 (annotated)

Committer:
xinlei
Date:
Wed Feb 25 10:06:11 2015 +0000
Revision:
76:b07effe83fb8
watchdog: added watchdog;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
xinlei 76:b07effe83fb8 1 #ifndef WATCHDOG_H
xinlei 76:b07effe83fb8 2 #define WATCHDOG_H
xinlei 76:b07effe83fb8 3 #include "mbed.h"
xinlei 76:b07effe83fb8 4
xinlei 76:b07effe83fb8 5 class Watchdog {
xinlei 76:b07effe83fb8 6 public:
xinlei 76:b07effe83fb8 7 // Load timeout value in watchdog timer and enable
xinlei 76:b07effe83fb8 8 void kick(float s) {
xinlei 76:b07effe83fb8 9 LPC_WDT->WDCLKSEL = 0x1; // Set CLK src to PCLK
xinlei 76:b07effe83fb8 10 uint32_t clk = SystemCoreClock / 16; // WD has a fixed /4 prescaler, PCLK default is /4
xinlei 76:b07effe83fb8 11 LPC_WDT->WDTC = s * (float)clk;
xinlei 76:b07effe83fb8 12 LPC_WDT->WDMOD = 0x3; // Enabled and Reset
xinlei 76:b07effe83fb8 13 kick();
xinlei 76:b07effe83fb8 14 }
xinlei 76:b07effe83fb8 15 // "kick" or "feed" the dog - reset the watchdog timer
xinlei 76:b07effe83fb8 16 // by writing this required bit pattern
xinlei 76:b07effe83fb8 17 void kick() {
xinlei 76:b07effe83fb8 18 LPC_WDT->WDFEED = 0xAA;
xinlei 76:b07effe83fb8 19 LPC_WDT->WDFEED = 0x55;
xinlei 76:b07effe83fb8 20 }
xinlei 76:b07effe83fb8 21 };
xinlei 76:b07effe83fb8 22 #endif /* WATCHDOG_H */