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Add support for lo- and hi-res RTC hardware

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4005 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2011-10-01 22:09:00 +00:00
parent b83c820523
commit 3f4af2fe30
13 changed files with 750 additions and 307 deletions
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sched/clock_initialize.c
+74 -42
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@@ -54,6 +54,12 @@
* Definitions
****************************************************************************/
#ifdef CONFIG_RTC
# ifndef CONFIG_SYSTEM_UTC
# error "In order to support hardware RTC system must have set the CONFIG_SYSTEM_UTC=y"
# endif
#endif
/* Standard time definitions (in units of seconds) */
#define SEC_PER_MIN ((time_t)60)
@@ -85,11 +91,11 @@
****************************************************************************/
#if CONFIG_SYSTEM_UTC
volatile time_t g_system_utc = 0;
volatile time_t g_system_utc;
#else
volatile clock_t g_system_timer = 0;
struct timespec g_basetime = {0,0};
uint32_t g_tickbias = 0;
volatile clock_t g_system_timer;
struct timespec g_basetime;
uint32_t g_tickbias;
#endif
/**************************************************************************
@@ -102,11 +108,11 @@ uint32_t g_tickbias = 0;
#if CONFIG_SYSTEM_UTC
#if TICK_PER_SEC > 32767
volatile uint32_t g_tickcount = 0;
volatile uint32_t g_tickcount;
#elif TICK_PER_SEC > 255
volatile uint16_t g_tickcount = 0;
volatile uint16_t g_tickcount;
#else
volatile uint8_t g_tickcount = 0;
volatile uint8_t g_tickcount;
#endif
#endif /* CONFIG_SYSTEM_UTC */
@@ -114,7 +120,7 @@ volatile uint8_t g_tickcount = 0;
* Private Functions
**************************************************************************/
/****************************************************************************
* Function: clock_timer
* Function: incr_utc
*
* Description:
* This function must be called once every time the real
@@ -139,9 +145,57 @@ static inline void incr_utc(void)
#endif
/****************************************************************************
* Private Functions
* Function: clock_inittime
*
* Description:
* Get the initial time value from the best source available.
*
****************************************************************************/
#ifdef CONFIG_RTC
#ifdef CONFIG_RTC_HIRES
static inline void clock_inittime(FAR struct timespec *tp)
{
/* Get the complete time from the hi-res RTC. */
(void)up_rtc_gettime(tp);
}
#else
static inline void clock_inittime(FAR struct timespec *tp)
{
/* Get the seconds (only) from the lo-res RTC */
tp->tv_sec = up_rtc_time();
tp->tv_nsec = 0;
}
#endif /* CONFIG_RTC_HIRES */
#else /* CONFIG_RTC */
static inline void clock_inittime(FAR struct timespec *tp)
{
time_t jdn = 0;
/* Get the EPOCH-relative julian date from the calendar year,
* month, and date
*/
jdn = clock_calendar2utc(CONFIG_START_YEAR, CONFIG_START_MONTH,
CONFIG_START_DAY);
/* Set the base time as seconds into this julian day. */
tp->tv_sec = jdn * SEC_PER_DAY;
tp->tv_nsec = 0;
}
#endif /* CONFIG_RTC */
/****************************************************************************
* Public Functions
****************************************************************************/
@@ -156,48 +210,26 @@ static inline void incr_utc(void)
void clock_initialize(void)
{
#ifndef CONFIG_SYSTEM_UTC
time_t jdn = 0;
#endif
/* Initialize the real time close (this should be un-nesssary except on a
* restart).
*/
#ifdef CONFIG_SYSTEM_UTC
g_system_utc = 0;
#else
g_system_timer = 0;
struct timespec ts;
#endif
/* Do we have hardware RTC support? */
/* Initialize the RTC hardware */
#ifdef CONFIG_RTC
#ifndef CONFIG_SYSTEM_UTC
# error In order to support hardware RTC system must have set the CONFIG_SYSTEM_UTC=y
#endif
up_rtcinitialize();
#endif
#ifndef CONFIG_SYSTEM_UTC
/* Initialize the time value */
/* Get the EPOCH-relative julian date from the calendar year,
* month, and date
*/
jdn = clock_calendar2utc(CONFIG_START_YEAR, CONFIG_START_MONTH,
CONFIG_START_DAY);
/* Set the base time as seconds into this julian day. */
g_basetime.tv_sec = jdn * SEC_PER_DAY;
g_basetime.tv_nsec = 0;
/* These is no time bias from this time. */
g_tickbias = 0;
#ifdef CONFIG_SYSTEM_UTC
clock_inittime(&ts);
g_system_utc = ts.tv_sec;
g_tickcount = ((ts.tv_nsec > 10) * CLOCKS_PER_SEC) / (1000000000 >> 10);
#else
clock_inittime(&g_basetime);
g_system_timer = 0;
g_tickbias = 0;
#endif
}