kopia lustrzana https://github.com/espressif/esp-idf
component/bt: Add option to configure BLE SCA through menuconfig and use a fixed value of clock cycle to estimate sleep duration for external 32kHz oscillator
wangmengyang
baohongde
rodzic
7403e8e11c
commit
ff2c583a0d
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@ -161,23 +161,65 @@ menu Bluetooth
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prompt "Bluetooth low power clock"
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depends on BTDM_MODEM_SLEEP_MODE_ORIG
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help
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Select the low power clock source for bluetooth controller
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Select the low power clock source for bluetooth controller. Bluetooth low power clock is
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the clock source to maintain time in sleep mode.
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- "Main crystal" option provides good accuracy and can support Dynamic Frequency Scaling
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to be used with Bluetooth modem sleep. Light sleep is not supported.
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- "External 32kHz crystal" option allows user to use a 32.768kHz crystal as Bluetooth low
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power clock. This option is allowed as long as External 32kHz crystal is configured as
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the system RTC clock source. This option provides good accuracy and supports Bluetooth
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modem sleep to be used alongside Dynamic Frequency Scaling or light sleep.
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config BTDM_LPCLK_SEL_MAIN_XTAL
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bool "Main crystal"
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help
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Main crystal can be used as low power clock for bluetooth modem sleep. If this option is
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selected, bluetooth modem sleep can work under Dynamic Frequency Scaling(DFS) enabled, but
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cannot work when light sleep is enabled. Main crystal has a relatively better performance than
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other bluetooth low power clock sources.
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cannot work when light sleep is enabled. Main crystal has a good performance in accuracy as
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the bluetooth low power clock source.
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config BTDM_LPCLK_SEL_EXT_32K_XTAL
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bool "External 32kHz crystal"
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depends on ESP32_RTC_CLK_SRC_EXT_CRYS
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help
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External 32kHz crystal has a nominal frequency of 32.768kHz and provides good frequency
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stability. If used as Bluetooth low power clock, External 32kHz can support Bluetooth
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modem sleep to be used with both DFS and light sleep.
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endchoice
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endmenu
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choice BTDM_BLE_SLEEP_CLOCK_ACCURACY
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prompt "BLE Sleep Clock Accuracy"
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depends on BTDM_CTRL_MODE_BLE_ONLY || BTDM_CTRL_MODE_BTDM
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default BTDM_BLE_DEFAULT_SCA_250PPM
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help
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BLE Sleep Clock Accuracy(SCA) for the local device is used to estimate window widening in BLE
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connection events. With a lower level of clock accuracy(e.g. 500ppm over 250ppm), the slave
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needs a larger RX window to synchronize with master in each anchor point, thus resulting in an
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increase of power consumption but a higher level of robustness in keeping connected. According
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to the requirements of Bluetooth Core specification 4.2, the worst-case accuracy of Classic
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Bluetooth low power oscialltor(LPO) is +/-250ppm in STANDBY and in low power modes such as
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sniff. For BLE the worst-case SCA is +/-500ppm.
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- "151ppm to 250ppm" option is the default value for Bluetooth Dual mode
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- "251ppm to 500ppm" option can be used in BLE only mode when using external 32kHz crystal as
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low power clock. This option is provided in case that BLE sleep clock has a lower level of
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accuracy, or other error sources contribute to the inaccurate timing during sleep.
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config BTDM_BLE_DEFAULT_SCA_500PPM
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bool "251ppm to 500ppm"
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depends on BTDM_LPCLK_SEL_EXT_32K_XTAL && BTDM_CTRL_MODE_BLE_ONLY
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config BTDM_BLE_DEFAULT_SCA_250PPM
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bool "151ppm to 250ppm"
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endchoice
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config BTDM_BLE_SLEEP_CLOCK_ACCURACY_INDEX_EFF
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int
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default 0 if BTDM_BLE_DEFAULT_SCA_500PPM
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default 1 if BTDM_BLE_DEFAULT_SCA_250PPM
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default 1
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config BTDM_BLE_SCAN_DUPL
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bool "BLE Scan Duplicate Options"
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depends on (BTDM_CTRL_MODE_BTDM || BTDM_CTRL_MODE_BLE_ONLY)
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@ -1148,7 +1148,8 @@ esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg)
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set_div_ret = btdm_lpclk_set_div(0);
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assert(select_src_ret && set_div_ret);
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btdm_lpcycle_us_frac = RTC_CLK_CAL_FRACT;
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btdm_lpcycle_us = esp_clk_slowclk_cal_get();
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btdm_lpcycle_us = (RTC_CLK_CAL_FRACT > 15) ? (1000000 << (RTC_CLK_CAL_FRACT - 15)) :
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(1000000 >> (15 - RTC_CLK_CAL_FRACT));
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assert(btdm_lpcycle_us != 0);
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#endif // CONFIG_BTDM_LPCLK_SEL_XX
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btdm_controller_set_sleep_mode(BTDM_MODEM_SLEEP_MODE_ORIG);
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@ -37,6 +37,21 @@ typedef enum {
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ESP_BT_MODE_BTDM = 0x03, /*!< Run dual mode */
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} esp_bt_mode_t;
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/**
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* @brief BLE sleep clock accuracy(SCA), values for ble_sca field in esp_bt_controller_config_t,
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* currently only ESP_BLE_SCA_500PPM and ESP_BLE_SCA_250PPM are supported
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*/
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enum {
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ESP_BLE_SCA_500PPM = 0, /*!< BLE SCA at 500ppm */
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ESP_BLE_SCA_250PPM, /*!< BLE SCA at 250ppm */
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ESP_BLE_SCA_150PPM, /*!< BLE SCA at 150ppm */
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ESP_BLE_SCA_100PPM, /*!< BLE SCA at 100ppm */
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ESP_BLE_SCA_75PPM, /*!< BLE SCA at 75ppm */
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ESP_BLE_SCA_50PPM, /*!< BLE SCA at 50ppm */
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ESP_BLE_SCA_30PPM, /*!< BLE SCA at 30ppm */
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ESP_BLE_SCA_20PPM, /*!< BLE SCA at 20ppm */
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};
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#ifdef CONFIG_BT_ENABLED
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/* While scanning, if the free memory value in controller is less than SCAN_SEND_ADV_RESERVED_SIZE,
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the adv packet will be discarded until the memory is restored. */
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@ -106,15 +121,16 @@ the adv packet will be discarded until the memory is restored. */
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.hci_uart_no = BT_HCI_UART_NO_DEFAULT, \
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.hci_uart_baudrate = BT_HCI_UART_BAUDRATE_DEFAULT, \
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.scan_duplicate_mode = SCAN_DUPLICATE_MODE, \
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.scan_duplicate_type = SCAN_DUPLICATE_TYPE_VALUE, \
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.scan_duplicate_type = SCAN_DUPLICATE_TYPE_VALUE, \
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.normal_adv_size = NORMAL_SCAN_DUPLICATE_CACHE_SIZE, \
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.mesh_adv_size = MESH_DUPLICATE_SCAN_CACHE_SIZE, \
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.send_adv_reserved_size = SCAN_SEND_ADV_RESERVED_SIZE, \
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.controller_debug_flag = CONTROLLER_ADV_LOST_DEBUG_BIT, \
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.mode = BTDM_CONTROLLER_MODE_EFF, \
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.ble_max_conn = CONFIG_BTDM_CTRL_BLE_MAX_CONN_EFF, \
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.bt_max_acl_conn = CONFIG_BTDM_CTRL_BR_EDR_MAX_ACL_CONN_EFF, \
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.bt_max_sync_conn = CONFIG_BTDM_CTRL_BR_EDR_MAX_SYNC_CONN_EFF, \
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.ble_max_conn = CONFIG_BTDM_CTRL_BLE_MAX_CONN_EFF, \
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.bt_max_acl_conn = CONFIG_BTDM_CTRL_BR_EDR_MAX_ACL_CONN_EFF, \
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.bt_max_sync_conn = CONFIG_BTDM_CTRL_BR_EDR_MAX_SYNC_CONN_EFF, \
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.ble_sca = CONFIG_BTDM_BLE_SLEEP_CLOCK_ACCURACY_INDEX_EFF, \
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.magic = ESP_BT_CONTROLLER_CONFIG_MAGIC_VAL, \
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};
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@ -150,6 +166,7 @@ typedef struct {
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* So, do not modify the value when esp_bt_controller_init()
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*/
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uint8_t bt_max_sync_conn; /*!< BR/EDR maximum ACL connection numbers. Effective in menuconfig */
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uint8_t ble_sca; /*!< BLE low power crystal accuracy index */
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uint32_t magic; /*!< Magic number */
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} esp_bt_controller_config_t;
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@ -1 +1 @@
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Subproject commit 70d6a277d7adb468fc4dbeed92a64144569bf080
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Subproject commit be2b20bbfc75f5644551eae135fa7547f82377aa
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