Class _wda: watchdog timer

This is used by:

• ATtiny24/44/84 : watchdog0
• ATtiny25/45/85 : watchdog0

Interrupts

• (watchdog0,irq): watchdog overflow

Actions

hwa( configure, ... ) - Configure the watchdog

When action is irq_or_reset the watchdog IRQ is enabled. It is disabled by hardware after a first timeout occurs. Then, if you do not re-enable the IRQ, the next timeout resets the device.

hwa( configure,   watchdog0,
 
   [ timeout,     16ms
                | 32ms
                | 64ms
                | 125ms
                | 250ms
                | 500ms
                | 1s
                | 2s
                | 4s
                | 8s, ]
 
     action,      none
                | irq
                | reset
                | irq_or_reset
);

hw( enable, ... ), hwa( enable, ... ) - Enable the watchdog

hw( enable, watchdog0 );

hwa( enable, watchdog0 );

hw( disable, ... ), hwa( disable, ... ) - Disable the watchdog

hw( disable, watchdog0 );

hwa( disable, watchdog0 );

hw( reset, ... ) - Reset the watchdog timer (issues a wdr):

hw( reset, watchdog0 );