sys_time_arch.c File Reference

linux timing functions More...

#include "mcu_periph/sys_time.h"
#include <stdio.h>
#include <pthread.h>
#include <sys/timerfd.h>
#include <time.h>
#include "rt_priority.h"
#include "std.h"
#include <unistd.h>

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Macros
#define	SYS_TIME_THREAD_PRIO   29
#define	NSEC_OF_SEC(sec)   ((sec) * 1e9)

Functions
void	sys_tick_handler (void)
void *	sys_time_thread_main (void *data)
void	sys_time_arch_init (void)
uint32_t	get_sys_time_usec (void)
	Get the time in microseconds since startup.
uint32_t	get_sys_time_usec100 (void)
	Get the time in 100microseconds since startup.
uint32_t	get_sys_time_msec (void)
	Get the time in milliseconds since startup.
void	sys_time_usleep (uint32_t us)
	Sleep.
void	sys_time_msleep (uint32_t ms)
	Sleep.

Variables
static struct timespec	startup_time

Detailed Description

linux timing functions

Definition in file sys_time_arch.c.

Macro Definition Documentation

NSEC_OF_SEC

#define NSEC_OF_SEC

(

sec

)

((sec) * 1e9)

Definition at line 51 of file sys_time_arch.c.

SYS_TIME_THREAD_PRIO

#define SYS_TIME_THREAD_PRIO   29

Definition at line 42 of file sys_time_arch.c.

Function Documentation

get_sys_time_msec()

uint32_t get_sys_time_msec

(

void

)

Get the time in milliseconds since startup.

Returns

milliseconds since startup as uint32_t

Definition at line 205 of file sys_time_arch.c.

References foo, and startup_time.

get_sys_time_usec()

uint32_t get_sys_time_usec

(

void

)

Get the time in microseconds since startup.

WARNING: overflows after 71min34seconds!

Returns

current system time as uint32_t

Definition at line 160 of file sys_time_arch.c.

References foo, and startup_time.

get_sys_time_usec100()

uint32_t get_sys_time_usec100

(

void

)

Get the time in 100microseconds since startup.

WARNING: overflows after 7000 minutes!

Returns

current system time as uint32_t

Definition at line 183 of file sys_time_arch.c.

References foo, and startup_time.

sys_tick_handler()

void sys_tick_handler

(

void

)

Definition at line 115 of file sys_time_arch.c.

References sys_time_timer::cb, cpu_ticks_of_nsec(), sys_time_timer::duration, sys_time_timer::elapsed, sys_time_timer::end_time, foo, sys_time_timer::in_use, LED_TOGGLE, sys_time::nb_sec, sys_time::nb_sec_rem, sys_time::nb_tick, startup_time, SYS_TIME_NB_TIMER, sys_time_ticks_of_sec(), sys_time_ticks_of_usec(), and sys_time::timer.

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sys_time_arch_init()

void sys_time_arch_init

(

void

)

Definition at line 97 of file sys_time_arch.c.

References sys_time::cpu_ticks_per_sec, foo, sys_time::resolution, sys_time::resolution_cpu_ticks, startup_time, and sys_time_thread_main().

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sys_time_msleep()

void sys_time_msleep

(

uint32_t

ms

)

Sleep.

Parameters

ms	milliseconds

Definition at line 228 of file sys_time_arch.c.

References foo, and sys_time_usleep().

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sys_time_thread_main()

void * sys_time_thread_main

(

void *

data

)

Definition at line 53 of file sys_time_arch.c.

References fd, foo, get_rt_prio(), NSEC_OF_SEC, sys_time::resolution, sys_tick_handler(), and SYS_TIME_THREAD_PRIO.

Referenced by sys_time_arch_init().

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sys_time_usleep()

void sys_time_usleep

(

uint32_t

us

)

Sleep.

Parameters

us	microseconds

Sleep.

using intermediate 64 bits variable to avoid wrapping

max sleep time is around 10 days (2^32 / CH_CFG_ST_FREQUENCY) at 10kHz

Definition at line 223 of file sys_time_arch.c.

References foo.

Variable Documentation

startup_time

struct timespec startup_time

static

Definition at line 45 of file sys_time_arch.c.

Referenced by get_sys_time_msec(), get_sys_time_usec(), get_sys_time_usec100(), sys_tick_handler(), and sys_time_arch_init().