watchdog.c File Reference

Watchdog Driver. More...

#include <bsp/raspberrypi.h>
#include <bsp/watchdog.h>

Macros
#define	PM_WDOG   BCM2835_REG(BCM2711_PM_WDOG)
#define	PM_RSTC   BCM2835_REG(BCM2711_PM_RSTC)

Functions
void	raspberrypi_watchdog_init ()
	Initialize BSP watchdog routines.
void	raspberrypi_watchdog_start (uint32_t timeout_ms)
	Turn on the watchdog / begin the counter at the desired value.
void	raspberrypi_watchdog_stop ()
	Turn off the watchdog.
void	raspberrypi_watchdog_reload ()
	Reload watchdog.
uint32_t	raspberrypi_watchdog_get_remaining_time ()
	Get the remaining time of the watchdog. The return value is still valid when the watchdog has been stopped.

Variables
uint32_t	raspberrypi_watchdog_timeout

Detailed Description

Watchdog Driver.

Function Documentation

raspberrypi_watchdog_get_remaining_time()

uint32_t raspberrypi_watchdog_get_remaining_time

(

void

)

Get the remaining time of the watchdog. The return value is still valid when the watchdog has been stopped.

Return values

Watchdog

remaining time in ms.

raspberrypi_watchdog_init()

void raspberrypi_watchdog_init

(

void

)

Initialize BSP watchdog routines.

Note

a brief example of expected usage.

void raspberrypi_watchdog_example() { raspberrypi_watchdog_init(); raspberrypi_watchdog_start(15000);

raspberrypi_watchdog_reload(); ... raspberrypi_watchdog_reload();

raspberrypi_watchdog_stop(); }

raspberrypi_watchdog_start()

void raspberrypi_watchdog_start

(

uint32_t

timeout_ms

)

Turn on the watchdog / begin the counter at the desired value.

Parameters

timeout

Watchdog timeout value in ms. The watchdog device has 20 bits of timeout, so it only supports a maximum of 15999 ms for its timeout. This value should be between 0 and 15999.