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fix(bt): Replace 32k_xtal with rtc_slow

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xiongweichao
2026-01-20 19:55:01 +08:00
parent 217e5743b9
commit ac88f5b20c
2 changed files with 15 additions and 13 deletions
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6
components/bt/controller/esp32/bt.c
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@@ -1559,7 +1559,11 @@ static esp_err_t btdm_low_power_mode_init(void)
btdm_lpcycle_us = 2 << (btdm_lpcycle_us_frac);
} else { // btdm_lpclk_sel == BTDM_LPCLK_SEL_XTAL32K
ESP_LOGI(BTDM_LOG_TAG, "Using external 32.768 kHz crystal/oscillator as clock source");
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL32K);
/* The enabling of the 32k crystal/oscillator depends on the RTC slow clock.
* Therefore, if the 32k crystal/oscillator is enabled, selecting BTDM_LPCLK_SEL_RTC_SLOW
* and BTDM_LPCLK_SEL_XTAL32K as the lp clock source is equivalent.
*/
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_RTC_SLOW);
set_div_ret = btdm_lpclk_set_div(0);
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;

22
components/bt/controller/esp32c3/bt.c
View File

@@ -1694,11 +1694,16 @@ static esp_err_t btdm_low_power_mode_init(esp_bt_controller_config_t *cfg)
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
s_lp_cntl.no_light_sleep = 1;
#endif
} else {
ESP_LOGI(BT_LOG_TAG, "Using external 32.768 kHz crystal/oscillator as clock source");
}
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_RTC_SLOW) { // Internal 136kHz RC oscillator
if (rtc_clk_slow_src_get() != SOC_RTC_SLOW_CLK_SRC_RC_SLOW) {
ESP_LOGW(BT_LOG_TAG, "Internal 136kHz RC oscillator not detected.");
assert(0);
} else {
ESP_LOGW(BT_LOG_TAG, "Using 136 kHz RC as clock source. The accuracy of this clock is a lot larger than 500ppm which is "
"required in Bluetooth communication, so don't select this option in scenarios such as BLE connection state.");
}
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_MAIN_XTAL) {
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
@@ -1722,18 +1727,11 @@ static esp_err_t btdm_low_power_mode_init(esp_bt_controller_config_t *cfg)
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = 1 << (btdm_lpcycle_us_frac);
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_EXT_32K_XTAL) {
ESP_LOGI(BT_LOG_TAG, "Using external 32.768 kHz crystal/oscillator as clock source");
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL32K);
set_div_ret = btdm_lpclk_set_div(0);
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = (RTC_CLK_CAL_FRACT > 15) ? (1000000 << (RTC_CLK_CAL_FRACT - 15)) :
(1000000 >> (15 - RTC_CLK_CAL_FRACT));
assert(btdm_lpcycle_us != 0);
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_RTC_SLOW) {
ESP_LOGW(BT_LOG_TAG, "Using 136 kHz RC as clock source. The accuracy of this clock is a lot larger than 500ppm which is "
"required in Bluetooth communication, so don't select this option in scenarios such as BLE connection state.");
} else if (s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_RTC_SLOW || s_lp_cntl.lpclk_sel == ESP_BT_SLEEP_CLOCK_EXT_32K_XTAL) {
/* The enabling of the 32k crystal/oscillator depends on the RTC slow clock.
* Therefore, if the 32k crystal/oscillator is enabled, selecting BTDM_LPCLK_SEL_RTC_SLOW
* and BTDM_LPCLK_SEL_XTAL32K as the lp clock source is equivalent.
*/
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_RTC_SLOW);
set_div_ret = btdm_lpclk_set_div(0);
assert(select_src_ret && set_div_ret);