diff options
Diffstat (limited to 'nuttx/sched/clock_internal.h')
| -rw-r--r-- | nuttx/sched/clock_internal.h | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/nuttx/sched/clock_internal.h b/nuttx/sched/clock_internal.h index 85cb13f06..2f7a9c783 100644 --- a/nuttx/sched/clock_internal.h +++ b/nuttx/sched/clock_internal.h @@ -40,6 +40,7 @@ * Included Files ********************************************************************************/ +#include <nuttx/config.h> #include <sys/types.h> #include <nuttx/compiler.h> @@ -56,7 +57,20 @@ #define USEC_PER_MSEC 1000 #define NSEC_PER_USEC 1000 -#define MSEC_PER_TICK 10 +/* The interrupt interval of the system timer is given by MSEC_PER_TICK. This + * is the expected number of milliseconds between calls from the processor- + * specific logic to sched_process_timer(). The default value of MSEC_PER_TICK + * is 10 milliseconds (100KHz). However, this default setting can be overridden + * by defining the interval in milliseconds as CONFIG_MSEC_PER_TICK in the board + * configuration file. + */ + +#ifdef CONFIG_MSEC_PER_TICK +# define MSEC_PER_TICK (CONFIG_MSEC_PER_TICK) +#else +# define MSEC_PER_TICK (10) +#endif + #define USEC_PER_TICK (MSEC_PER_TICK * USEC_PER_MSEC) #define NSEC_PER_TICK (MSEC_PER_TICK * NSEC_PER_MSEC) #define TICK_PER_SEC (MSEC_PER_SEC / MSEC_PER_TICK) @@ -64,13 +78,15 @@ #define MSEC2TICK(msec) (((msec)+(MSEC_PER_TICK/2))/MSEC_PER_TICK) #define USEC2TICK(usec) (((usec)+(USEC_PER_TICK/2))/USEC_PER_TICK) -#define JD_OF_EPOCH 2440588 /* Julian Date of noon, J1970 */ +#define JD_OF_EPOCH 2440588 /* Julian Date of noon, J1970 */ #ifdef CONFIG_JULIAN_TIME -# define GREG_DUTC -141427 /* Default is October 15, 1582 */ -# define GREG_YEAR 1582 -# define GREG_MONTH 10 -# define GREG_DAY 15 + +# define GREG_DUTC -141427 /* Default is October 15, 1582 */ +# define GREG_YEAR 1582 +# define GREG_MONTH 10 +# define GREG_DAY 15 + #endif /* CONFIG_JULIAN_TIME */ /******************************************************************************** |