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Made DIO interval processing a little easier to follow. Explicitly state that the delay is handled as clock timer ticks.

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This commit is contained in:
Adam Dunkels 2012-11-26 19:35:39 +01:00
parent 8538aaf655
commit 2396f9b8ea
2 changed files with 8 additions and 9 deletions
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15
core/net/rpl/rpl-timers.c
View File

@ -81,25 +81,24 @@ static void
new_dio_interval(rpl_instance_t *instance)
{
uint32_t time;
clock_time_t ticks;
/* TODO: too small timer intervals for many cases */
time = 1UL << instance->dio_intcurrent;
/* Convert from milliseconds to CLOCK_TICKS. */
time = (time * CLOCK_SECOND) / 1000;
instance->dio_next_delay = time;
ticks = (time * CLOCK_SECOND) / 1000;
instance->dio_next_delay = ticks;
/* random number between I/2 and I */
time = time >> 1;
time += (time * random_rand()) / RANDOM_RAND_MAX;
ticks = ticks / 2 + (ticks / 2 * (uint32_t)random_rand()) / RANDOM_RAND_MAX;
/*
* The intervals must be equally long among the nodes for Trickle to
* operate efficiently. Therefore we need to calculate the delay between
* the randomized time and the start time of the next interval.
*/
instance->dio_next_delay -= time;
instance->dio_next_delay -= ticks;
instance->dio_send = 1;
#if RPL_CONF_STATS
@ -119,8 +118,8 @@ new_dio_interval(rpl_instance_t *instance)
instance->dio_counter = 0;
/* schedule the timer */
PRINTF("RPL: Scheduling DIO timer %lu ticks in future (Interval)\n", time);
ctimer_set(&instance->dio_timer, time, &handle_dio_timer, instance);
PRINTF("RPL: Scheduling DIO timer %lu ticks in future (Interval)\n", ticks);
ctimer_set(&instance->dio_timer, ticks, &handle_dio_timer, instance);
}
/*---------------------------------------------------------------------------*/
static void

2
core/net/rpl/rpl.h
View File

@ -221,7 +221,7 @@ struct rpl_instance {
uint16_t dio_totsend;
uint16_t dio_totrecv;
#endif /* RPL_CONF_STATS */
uint32_t dio_next_delay; /* delay for completion of dio interval */
clock_time_t dio_next_delay; /* delay for completion of dio interval */
struct ctimer dio_timer;
struct ctimer dao_timer;
};