void
mcu_watchdog_enable (void)
{
/* Enable watchdog with 2s timeout. */
WDT->WDT_MR = WDT_MR_WDD(0x200) | WDT_MR_WDRSTEN | WDT_MR_WDDBGHLT;
mcu_watchdog_reset ();
}
void watchdogEnable (uint32_t timeout)
{
/* this assumes the slow clock is running at 32.768 kHz
watchdog frequency is therefore 32768 / 128 = 256 Hz */
timeout = timeout * 256 / 1000;
if (timeout == 0)
timeout = 1;
else if (timeout > 0xFFF)
timeout = 0xFFF;
timeout = WDT_MR_WDRSTEN | WDT_MR_WDV(timeout) | WDT_MR_WDD(timeout);
WDT_Enable (WDT, timeout);
}
// Configures the watchdog timer to 16s (can only be called once).
void wdt_start(void) {
if(wdt_has_error()) {
// If there is an error in the wdt status register the watchdog
// timer reached 0 since last call of start
wdt_counter++;
}
WDT->WDT_MR = WDT_MR_WDV(WDT_TIMEOUT_16S) |
WDT_MR_WDD(WDT_TIMEOUT_16S) |
WDT_MR_WDFIEN |
WDT_MR_WDRSTEN |
WDT_MR_WDDBGHLT |
WDT_MR_WDIDLEHLT;
}
void
watchdog_init(void)
{
uint32_t timeout = 500 * 32768 / 128 / 1000; // 500ms timeout
WDT->WDT_MR = WDT_MR_WDRSTEN | WDT_MR_WDV(timeout) | WDT_MR_WDD(timeout);
}
/**
* \brief Initialize watchdog timer with the given mode.
*
* \param p_wdt Pointer to a WDT instance.
* \param ul_mode Bitmask of watchdog timer mode.
* \param us_counter The value loaded in the 12-bit Watchdog Counter.
* \param us_delta The permitted range for reloading the Watchdog Timer.
*/
void wdt_init(Wdt *p_wdt, uint32_t ul_mode, uint16_t us_counter,
uint16_t us_delta)
{
p_wdt->WDT_MR = ul_mode |
WDT_MR_WDV(us_counter) | WDT_MR_WDD(us_delta);
}
