watchdog.c

#include <dev/watchdog.h>
#include <em_wdog.h>

void watchdog_init(void)
{
  static const WDOG_Init_TypeDef init =
  {
    .enable = false,
    .debugRun = false,
    .em2Run = false,
    .em3Run = false,
    .em4Block = false,
    .swoscBlock = false,
    .lock = false,
    .clkSel = wdogClkSelULFRCO,
    .perSel = wdogPeriod_4k, /* 4 sec. */
  };
  WDOG_Init(&init);
}

void watchdog_start(void)
{
  /* XXX!!! Does not work when system is locked in EM1, but no event is expected (f.e. usb-powered device) */
#if 0
  WDOG_Enable(true);
#endif
}

void watchdog_periodic(void)
{
  WDOG_Feed();
}

void watchdog_stop(void)
{
  WDOG_Enable(false);
}

void watchdog_reboot(void)
{
  static const WDOG_Init_TypeDef init =
  {
    .enable = true,
    .debugRun = true,
    .em2Run = true,
    .em3Run = true,
    .em4Block = true,
    .swoscBlock = true,
    .lock = true,
    .clkSel = wdogClkSelLFRCO,
    .perSel = wdogPeriod_9,
  };
  WDOG_Init(&init);
  /* Loop until reboot by wdog */
  __disable_irq();
  while(1);
}