neorv32_wdt.c File Reference

Direct Memory Access Controller (DMA) HW driver source file. More...

#include <neorv32.h>

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

Detailed Description

Direct Memory Access Controller (DMA) HW driver source file.

Watchdog Timer (WDT) HW driver source file.

Note

These functions should only be used if the DMA controller was synthesized (IO_DMA_EN = true).

See also

https://stnolting.github.io/neorv32/sw/files.html

Note

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

See also

https://stnolting.github.io/neorv32/sw/files.html

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

(

uint32_t

password

)

Feed watchdog (reset timeout counter).

Parameters

[in]

password

Password for WDT reset.

neorv32_wdt_get_cause()

int neorv32_wdt_get_cause

(

void

)

Get cause of last system reset.

Returns

Cause of last reset (NEORV32_WDT_RCAUSE_enum).

neorv32_wdt_setup()

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

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.
[in]	strict	Force hardware reset if reset password is incorrect or if trying to alter a locked configuration.