WatchdogTiva.h File Reference

Detailed Description

Watchdog driver implementation for Tiva.

============================================================================

The Watchdog header file for Tiva should be included in an application as follows:

#include <ti/drivers/Watchdog.h>
#include <ti/drivers/watchdog/WatchdogTiva.h>

This Watchdog driver implementation is designed to operate on a Tiva device. Once opened, Tiva Watchdog will count down from the reload value specified in the WatchdogTiva_HWAttrs. If it times out, the Watchdog interrupt flag will be set, and a user-provided callback function will be called. If resets have been enabled in the Watchdog_Params and the Watchdog Timer is allowed to time out again while the interrupt flag is still pending, a reset signal will be generated. To prevent a reset, Watchdog_clear() must be called to clear the interrupt flag.

The reload value from which the Watchdog Timer counts down may be changed during runtime using Watchdog_setReload().

Watchdog_close() is not supported by this driver implementation.

By default the Watchdog driver has resets turned on. However, they may be turned off in the Watchdog_Params which allows the Watchdog Timer to be used like another timer interrupt. This functionality is not supported by all platforms, refer to device specific documentation for details.

To have a user-defined function run at the warning interrupt, first define a void-type function that takes a Watchdog_Handle cast to a UArg as an argument such as the one shown below.

void callback(UArg handle);

...

Watchdog_Handle handle;
Watchdog_Params params;

Watchdog_Params_init(&params);
params.callbackFxn = callback;
handle = Watchdog_open(Watchdog_configIndex, &params);

---

#include <stdint.h>
#include <stdbool.h>
#include <ti/drivers/Watchdog.h>
#include <ti/sysbios/family/arm/m3/Hwi.h>

Include dependency graph for WatchdogTiva.h:

Go to the source code of this file.

Data Structures
struct	WatchdogTiva_HWAttrs
	Watchdog hardware attributes for Tiva. More...
struct	WatchdogTiva_Object
	Watchdog Object for Tiva. More...

Macros
#define	ti_sysbios_family_arm_m3_Hwi__nolocalnames

Typedefs
typedef struct WatchdogTiva_HWAttrs	WatchdogTiva_HWAttrs
	Watchdog hardware attributes for Tiva. More...
typedef struct WatchdogTiva_Object	WatchdogTiva_Object
	Watchdog Object for Tiva. More...

Variables
const Watchdog_FxnTable	WatchdogTiva_fxnTable
	Watchdog function table for Tiva. More...

Macro Definition Documentation

#define ti_sysbios_family_arm_m3_Hwi__nolocalnames

Typedef Documentation

typedef struct WatchdogTiva_HWAttrs WatchdogTiva_HWAttrs

Watchdog hardware attributes for Tiva.

typedef struct WatchdogTiva_Object WatchdogTiva_Object

Watchdog Object for Tiva.

Not to be accessed by the user.

Variable Documentation

const Watchdog_FxnTable WatchdogTiva_fxnTable

Watchdog function table for Tiva.