neorv32_wdt.c File Reference

Watchdog Timer (WDT) HW driver source file. More...

#include "neorv32.h"
#include "neorv32_wdt.h"

Functions
int	neorv32_wdt_available (void)
void	neorv32_wdt_setup (uint32_t timeout, int lock, int debug_en, int sleep_en)
int	neorv32_wdt_disable (void)
void	neorv32_wdt_feed (void)
int	neorv32_wdt_get_cause (void)

Detailed Description

Watchdog Timer (WDT) HW driver source file.

Note

These functions should only be used if the WDT unit was synthesized (IO_WDT_EN = true).

Function Documentation

neorv32_wdt_available()

int neorv32_wdt_available

(

void

)

Check if WDT unit was synthesized.

Returns

0 if WDT was not synthesized, 1 if WDT is available.

neorv32_wdt_disable()

int neorv32_wdt_disable

(

void

)

Disable watchdog timer.

Returns

Returns 0 if WDT is really deactivated, -1 otherwise.

neorv32_wdt_feed()

void neorv32_wdt_feed

(

void

)

Feed watchdog (reset timeout counter).

neorv32_wdt_get_cause()

int neorv32_wdt_get_cause

(

void

)

Get cause of last system reset.

Returns

Cause of last reset (0: system reset - OCD or external, 1: watchdog timeout).

neorv32_wdt_setup()

void neorv32_wdt_setup	(	uint32_t	timeout,
		int	lock,
		int	debug_en,
		int	sleep_en
	)

Configure and enable watchdog timer. The WDT control register bits are listed in NEORV32_WDT_CTRL_enum.

Warning

Once the lock bit is set it can only be removed by a hardware reset!

Parameters

[in]	timeout	24-bit timeout value. A WDT IRQ is triggered when the internal counter reaches 'timeout/2'. A system hardware reset is triggered when the internal counter reaches 'timeout'.
[in]	lock	Control register will be locked when 1 (until next reset).
[in]	debug_en	Allow watchdog to continue operation even when CPU is in debug mode.
[in]	sleep_en	Allow watchdog to continue operation even when CPU is in sleep mode.