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Add time and uptime

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3506 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2011-04-15 14:57:53 +00:00
parent b8fd73ec72
commit 32e6941ed7
15 changed files with 377 additions and 54 deletions
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sched/clock_initialize.c
+73 -4
View File
@@ -43,6 +43,8 @@
#include <time.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/clock.h>
#include <nuttx/time.h>
#include "clock_internal.h"
@@ -55,6 +57,12 @@
#define SEC_PER_HOUR ((time_t)60 * SEC_PER_MIN)
#define SEC_PER_DAY ((time_t)24 * SEC_PER_HOUR)
#if __HAVE_SYSTEM_COUNTER
# define incr_systimer() g_system_timer++
#else
# define incr_systimer()
#endif
/****************************************************************************
* Private Type Declarations
****************************************************************************/
@@ -71,14 +79,63 @@
* Public Variables
****************************************************************************/
volatile uint32_t g_system_timer = 0;
struct timespec g_basetime = {0,0};
uint32_t g_tickbias = 0;
#if __HAVE_SYSTEM_COUNTER
volatile clock_t g_system_timer = 0;
#endif
#if CONFIG_UPTIME
volatile time_t g_uptime = 0;
#endif
struct timespec g_basetime = {0,0};
uint32_t g_tickbias = 0;
/**************************************************************************
* Private Variables
**************************************************************************/
/* This variable is used to count ticks and to increment the one-second
* uptime variable.
*/
#if CONFIG_UPTIME
#if TICK_PER_SEC > 32767
static uint32_t g_tickcount = 0;
#elif TICK_PER_SEC > 255
static uint16_t g_tickcount = 0;
#else
static uint8_t g_tickcount = 0;
#endif
#endif /* CONFIG_UPTIME */
/**************************************************************************
* Private Functions
**************************************************************************/
/****************************************************************************
* Function: clock_timer
*
* Description:
* This function must be called once every time the real
* time clock interrupt occurs. The interval of this
* clock interrupt must be MSEC_PER_TICK
*
****************************************************************************/
#if CONFIG_UPTIME
static inline void incr_uptime(void)
{
g_tickcount++;
if (g_tickcount >= TICK_PER_SEC)
{
g_uptime++;
g_tickcount -= TICK_PER_SEC;
}
}
#else
# define incr_uptime()
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
@@ -101,14 +158,20 @@ void clock_initialize(void)
/* Initialize the real time close */
#if __HAVE_SYSTEM_COUNTER
g_system_timer = 0;
#endif
/* Get the EPOCH-relative julian date from the calendar year,
* month, and date
*/
#ifndef CONFIG_PTIMER
jdn = clock_calendar2utc(CONFIG_START_YEAR, CONFIG_START_MONTH,
CONFIG_START_DAY);
#else /* use UTC as starting date */
jdn = clock_calendar2utc(1970, 1, 1);
#endif
/* Set the base time as seconds into this julian day. */
@@ -132,5 +195,11 @@ void clock_initialize(void)
void clock_timer(void)
{
g_system_timer++;
/* Increment the per-tick system counter */
incr_systimer();
/* Increment the per-second uptime counter */
incr_uptime();
}