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ESP32C3:bluetooth support use main XTAL in light sleep mode

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This commit is contained in:
xiongweichao
2021-10-13 15:13:21 +08:00
parent 6e98440ab1
commit d85d927bb0
2 changed files with 54 additions and 17 deletions
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52
components/bt/controller/esp32c3/bt.c
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@@ -72,7 +72,8 @@ typedef union {
uint32_t mac_bb_pd : 1; // whether hardware(MAC, BB) force-power-down is required during sleep
uint32_t wakeup_timer_required : 1; // whether system timer is needed
uint32_t no_light_sleep : 1; // do not allow system to enter light sleep after bluetooth is enabled
uint32_t reserved : 26; // reserved
uint32_t main_xtal_pu : 1; // power up main XTAL
uint32_t reserved : 25; // reserved
};
uint32_t val;
} btdm_lpcntl_t;
@@ -1003,12 +1004,13 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
// set default values for global states or resources
s_lp_stat.val = 0;
s_lp_cntl.val = 0;
s_lp_cntl.main_xtal_pu = 0;
s_wakeup_req_sem = NULL;
s_btdm_slp_tmr = NULL;
// configure and initialize resources
s_lp_cntl.enable = (cfg->sleep_mode == ESP_BT_SLEEP_MODE_1) ? 1 : 0;
s_lp_cntl.no_light_sleep = 1;
s_lp_cntl.no_light_sleep = 0;
if (s_lp_cntl.enable) {
#if CONFIG_MAC_BB_PD
@@ -1051,33 +1053,41 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
// check whether or not EXT_CRYS is working
if (rtc_clk_slow_src_get() == SOC_RTC_SLOW_CLK_SRC_XTAL32K) {
s_lp_cntl.lpclk_sel = BTDM_LPCLK_SEL_XTAL32K; // External 32 kHz XTAL
s_lp_cntl.no_light_sleep = 0;
} else {
ESP_LOGW(BTDM_LOG_TAG, "32.768kHz XTAL not detected, fall back to main XTAL as Bluetooth sleep clock\n"
"light sleep mode will not be able to apply when bluetooth is enabled");
ESP_LOGW(BTDM_LOG_TAG, "32.768kHz XTAL not detected, fall back to main XTAL as Bluetooth sleep clock.");
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
s_lp_cntl.no_light_sleep = 1;
#endif
}
#elif CONFIG_BT_CTRL_LPCLK_SEL_RTC_SLOW
// check whether or not EXT_CRYS is working
#elif (CONFIG_BT_CTRL_LPCLK_SEL_MAIN_XTAL)
ESP_LOGI(BTDM_LOG_TAG, "Bluetooth will use main XTAL as Bluetooth sleep clock.");
#if !CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
s_lp_cntl.no_light_sleep = 1;
#endif
#elif (CONFIG_BT_CTRL_LPCLK_SEL_RTC_SLOW)
// check whether or not internal 150 kHz RC oscillator is working
if (rtc_clk_slow_src_get() == SOC_RTC_SLOW_CLK_SRC_RC_SLOW) {
s_lp_cntl.lpclk_sel = BTDM_LPCLK_SEL_RTC_SLOW; // Internal 150 kHz RC oscillator
ESP_LOGW(BTDM_LOG_TAG, "Internal 150kHz RC osciallator. 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 {
ESP_LOGW(BT_LOG_TAG, "Internal 150kHz RC oscillator not detected.");
ESP_LOGW(BTDM_LOG_TAG, "Internal 150kHz RC oscillator not detected.");
assert(0);
}
#else
s_lp_cntl.no_light_sleep = 1;
#endif
bool select_src_ret __attribute__((unused));
bool set_div_ret __attribute__((unused));
if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_XTAL) {
#ifdef CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
ESP_ERROR_CHECK(esp_sleep_pd_config(ESP_PD_DOMAIN_XTAL, ESP_PD_OPTION_ON));
s_lp_cntl.main_xtal_pu = 1;
#endif
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL);
set_div_ret = btdm_lpclk_set_div(esp_clk_xtal_freq() * 2 / MHZ);
set_div_ret = btdm_lpclk_set_div(esp_clk_xtal_freq() / MHZ);
assert(select_src_ret && set_div_ret);
btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
btdm_lpcycle_us = 2 << (btdm_lpcycle_us_frac);
btdm_lpcycle_us = 1 << (btdm_lpcycle_us_frac);
} else if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_XTAL32K) {
select_src_ret = btdm_lpclk_select_src(BTDM_LPCLK_SEL_XTAL32K);
set_div_ret = btdm_lpclk_set_div(0);
@@ -1103,6 +1113,7 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
err = ESP_ERR_NO_MEM;
goto error;
}
ESP_LOGW(BTDM_LOG_TAG, "Light sleep mode will not be able to apply when bluetooth is enabled.");
}
if ((err = esp_pm_lock_create(ESP_PM_APB_FREQ_MAX, 0, "bt", &s_pm_lock)) != ESP_OK) {
err = ESP_ERR_NO_MEM;
@@ -1173,6 +1184,15 @@ error:
s_wakeup_req_sem = NULL;
}
}
if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_XTAL) {
#ifdef CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
if (s_lp_cntl.main_xtal_pu) {
ESP_ERROR_CHECK(esp_sleep_pd_config(ESP_PD_DOMAIN_XTAL, ESP_PD_OPTION_OFF));
s_lp_cntl.main_xtal_pu = 0;
}
#endif
}
} while (0);
#if CONFIG_MAC_BB_PD
@@ -1235,6 +1255,14 @@ esp_err_t esp_bt_controller_deinit(void)
semphr_delete_wrapper(s_wakeup_req_sem);
s_wakeup_req_sem = NULL;
}
if (s_lp_cntl.lpclk_sel == BTDM_LPCLK_SEL_XTAL) {
#ifdef CONFIG_BT_CTRL_MAIN_XTAL_PU_DURING_LIGHT_SLEEP
if (s_lp_cntl.main_xtal_pu) {
ESP_ERROR_CHECK(esp_sleep_pd_config(ESP_PD_DOMAIN_XTAL, ESP_PD_OPTION_OFF));
s_lp_cntl.main_xtal_pu = 0;
}
#endif
}
} while (0);
#if CONFIG_MAC_BB_PD