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reduce the minimum delay uncertainty of esp_timer for Bluetooth modem sleep from 1.8ms to 0.5ms for lower power consumption

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wangmengyang 2019-04-09 17:06:16 +08:00 committed by baohongde
parent ff2c583a0d
commit f678a6289d
1 changed files with 1 additions and 1 deletions
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components/bt/bt.c
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@ -818,7 +818,7 @@ static void btdm_sleep_enter_phase1_wrapper(uint32_t lpcycles)
// start a timer to wake up and acquire the pm_lock before modem_sleep awakes
uint32_t us_to_sleep = btdm_lpcycles_2_us(lpcycles);
#define BTDM_MIN_TIMER_UNCERTAINTY_US (1800)
#define BTDM_MIN_TIMER_UNCERTAINTY_US (500)
assert(us_to_sleep > BTDM_MIN_TIMER_UNCERTAINTY_US);
// allow a maximum time uncertainty to be about 488ppm(1/2048) at least as clock drift
// and set the timer in advance