neorv32_mtime.c File Reference

Machine System Timer (MTIME) HW driver source file. More...

#include <neorv32.h>

Functions
int	neorv32_mtime_available (void)
void	neorv32_mtime_set_time (uint64_t time)
uint64_t	neorv32_mtime_get_time (void)
void	neorv32_mtime_set_timecmp (uint64_t timecmp)
uint64_t	neorv32_mtime_get_timecmp (void)
void	neorv32_mtime_set_unixtime (uint64_t unixtime)
uint64_t	neorv32_mtime_get_unixtime (void)

Detailed Description

Machine System Timer (MTIME) HW driver source file.

Note

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

See also

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

Function Documentation

neorv32_mtime_available()

int neorv32_mtime_available

(

void

)

Check if MTIME unit was synthesized.

Returns

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

neorv32_mtime_get_time()

uint64_t neorv32_mtime_get_time

(

void

)

Get current system time.

Note

The MTIME timer increments with the primary processor clock.

Returns

Current system time (uint64_t)

neorv32_mtime_get_timecmp()

uint64_t neorv32_mtime_get_timecmp

(

void

)

Get compare time register (MTIMECMP).

Returns

Current MTIMECMP value.

neorv32_mtime_get_unixtime()

uint64_t neorv32_mtime_get_unixtime

(

void

)

Get Unix time from TIME.

Returns

Unix time since 00:00:00 UTC, January 1st, 1970 in seconds.

neorv32_mtime_set_time()

void neorv32_mtime_set_time

(

uint64_t

time

)

Set current system time.

Note

The MTIME timer increments with the primary processor clock.

Parameters

[in]

time

New system time (uint64_t)

neorv32_mtime_set_timecmp()

void neorv32_mtime_set_timecmp

(

uint64_t

timecmp

)

Set compare time register (MTIMECMP) for generating interrupts.

Note

The interrupt is triggered when MTIME >= MTIMECMP.

Global interrupts and the timer interrupt source have to be enabled.

Parameters

[in]

timecmp

System time for interrupt (uint64_t)

neorv32_mtime_set_unixtime()

void neorv32_mtime_set_unixtime

(

uint64_t

unixtime

)

Set TIME to Unix time.

Parameters

[in]

unixtime

Unix time since 00:00:00 UTC, January 1st, 1970 in seconds.