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utilities/101: Add 1 tick offset to nanotimer

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In certain cases with the Arduino 101/Zephyr, using the upm_delay*()
functions can cause hangs and/or exceptions.  Adding a single tick to
the generated offset resolves these issues.

The documentation warns that this is a good idea to ensure that a
timer does not expire early.  Adding this made the random hangs and
CPU exceptions go away.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
This commit is contained in:
Jon Trulson 2016-09-30 17:05:15 -06:00
parent 4b149313e6
commit f0fa6f7b68
1 changed files with 3 additions and 3 deletions
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6
src/utilities/upm_utilities.c
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@ -32,7 +32,7 @@ void upm_delay(int time){
struct nano_timer timer;
void *timer_data[1];
nano_timer_init(&timer, timer_data);
nano_timer_start(&timer, SECONDS(time));
nano_timer_start(&timer, SECONDS(time) + 1);
nano_timer_test(&timer, TICKS_UNLIMITED);
#endif
}
@ -44,7 +44,7 @@ void upm_delay_ms(int time){
struct nano_timer timer;
void *timer_data[1];
nano_timer_init(&timer, timer_data);
nano_timer_start(&timer, MSEC(time));
nano_timer_start(&timer, MSEC(time) + 1);
nano_timer_test(&timer, TICKS_UNLIMITED);
#endif
}
@ -56,7 +56,7 @@ void upm_delay_us(int time){
struct nano_timer timer;
void *timer_data[1];
nano_timer_init(&timer, timer_data);
nano_timer_start(&timer, USEC(time));
nano_timer_start(&timer, USEC(time) + 1);
nano_timer_test(&timer, TICKS_UNLIMITED);
#endif
}