kaspar/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2025-12-29 16:31:18 +01:00
Code Releases Activity

sys: xtimer: avoid setting timers multiple times from within ISR

Browse Source
This commit is contained in:
Kaspar Schleiser 2015-09-12 21:32:17 +02:00
parent bd19a903ab
commit 48611c0572
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/xtimer/xtimer_core.c
View File

@ -26,6 +26,8 @@
#define ENABLE_DEBUG 0
#include "debug.h"
static volatile int _in_handler = 0;
static volatile uint32_t _long_cnt = 0;
#if XTIMER_MASK
volatile uint32_t _high_cnt = 0;
@ -146,6 +148,9 @@ static void _shoot(xtimer_t *timer)
static inline void _lltimer_set(uint32_t target)
{
if (_in_handler) {
return;
}
DEBUG("__lltimer_set(): setting %" PRIu32 "\n", _mask(target));
#ifdef XTIMER_SHIFT
target >>= XTIMER_SHIFT;
@ -420,6 +425,8 @@ static void _timer_callback(void)
uint32_t next_target;
uint32_t reference;
_in_handler = 1;
DEBUG("_timer_callback() now=%" PRIu32 " (%" PRIu32 ")pleft=%" PRIu32 "\n", xtimer_now(),
_mask(xtimer_now()), _mask(0xffffffff-xtimer_now()));
@ -505,6 +512,8 @@ overflow:
}
}
_in_handler = 0;
/* set low level timer */
_lltimer_set(next_target);
}