/**
* @brief Watchdog Timer Interrupt Handler
* @return Nothing
* @note Handles watchdog timer warning and timeout events
*/
void WDT_IRQHandler(void)
{
uint32_t wdtStatus = Chip_WWDT_GetStatus(LPC_WWDT);
#if defined(CHIP_LPC11CXX)
if (wdtStatus & WWDT_WDMOD_WDTOF) {
Board_LED_Toggle(0);
while(Chip_WWDT_GetStatus(LPC_WWDT) & WWDT_WDMOD_WDTOF) {
Chip_WWDT_ClearStatusFlag(LPC_WWDT, WWDT_WDMOD_WDTOF);
}
Chip_WWDT_Start(LPC_WWDT); /* Needs restart */
}
#else
Board_LED_Toggle(0);
/* The chip will reset before this happens, but if the WDT doesn't
have WWDT_WDMOD_WDRESET enabled, this will hit once */
if (wdtStatus & WWDT_WDMOD_WDTOF) {
/* A watchdog feed didn't occur prior to window timeout */
Chip_WWDT_ClearStatusFlag(LPC_WWDT, WWDT_WDMOD_WDTOF);
Chip_WWDT_Start(LPC_WWDT); /* Needs restart */
}
/* Handle warning interrupt */
if (wdtStatus & WWDT_WDMOD_WDINT) {
/* A watchdog feed didn't occur prior to warning timeout */
Chip_WWDT_ClearStatusFlag(LPC_WWDT, WWDT_WDMOD_WDINT);
Chip_WWDT_Feed(LPC_WWDT);
}
#endif
}
void WDTInit( void )
{
uint32_t i;
//uint32_t wdtFreq;
/* Initialize WWDT (also enables WWDT clock) */
Chip_WWDT_Init(LPC_WWDT);
/* Prior to initializing the watchdog driver, the clocking for the
watchdog must be enabled. This example uses the watchdog oscillator
set at a 50KHz (1Mhz / 20) clock rate. */
Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_WDTOSC_PD);
Chip_Clock_SetWDTOSC(WDTLFO_OSC_1_05, 20);
/* The WDT divides the input frequency into it by 4 */
//wdtFreq = Chip_Clock_GetWDTOSCRate() / 4;
/* LPC1102/4, LPC11XXLV, and LPC11CXX devices select the watchdog
clock source from the SYSCLK block, while LPC11AXX, LPC11EXX, and
LPC11UXX devices select the clock as part of the watchdog block. */
/* Select watchdog oscillator for WDT clock source */
Chip_WWDT_SelClockSource(LPC_WWDT, WWDT_CLKSRC_WATCHDOG_WDOSC);
Chip_WWDT_SetTimeOut(LPC_WWDT, 0x7FFF);
Chip_WWDT_SetOption(LPC_WWDT, (WWDT_WDMOD_WDEN|WWDT_WDMOD_WDRESET));
Chip_WWDT_Feed(LPC_WWDT);
/* Make sure feed sequence executed properly */
for (i = 0; i < 0x80; i++);
return;
}
/**
* @brief SysTick Interrupt Handler
* @return Nothing
* @note Systick interrupt handler feeds WWDT
*/
void SysTick_Handler(void)
{
#if !defined(DISABLE_WDT_TIMEOUT)
Chip_WWDT_Feed(LPC_WWDT);
#endif
}
