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component/bt: bugfix of bluetooth modem sleep not being able to work with Dynamic Frequency Scaling

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1. start an esp_timer on entering sleep to acquire pm_lock before wake up from modem sleep
2. decrease the clock division of XTAL fed to bluetooth low power clock from 32us to 2us period to allow to work under 240MHz Max CPU frequency
3. decrease the minimum sleep duration threshold to allow shorter bluetooth modem sleep period, especially for BLE with short connection interval
4. reconfigure bluetooth baseband(BT-BB) settings after PHY/RF init upon waking up from modem sleep to avoid packet RX/TX performance degradation
This commit is contained in:
wangmengyang
2018-12-14 14:56:29 +08:00
parent 24ebdbd3f4
commit 8de9149b11
6 changed files with 174 additions and 55 deletions
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1
components/bt/include/esp_bt.h
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@@ -405,7 +405,6 @@ esp_err_t esp_bt_mem_release(esp_bt_mode_t mode);
*
* For ORIG mode:
* Bluetooth modem sleep is enabled in controller start up by default if CONFIG_BTDM_CONTROLLER_MODEM_SLEEP is set and "ORIG mode" is selected. In ORIG modem sleep mode, bluetooth controller will switch off some components and pause to work every now and then, if there is no event to process; and wakeup according to the scheduled interval and resume the work. It can also wakeup earlier upon external request using function "esp_bt_controller_wakeup_request".
* Note that currently there is problem in the combination use of bluetooth modem sleep and Dynamic Frequency Scaling(DFS). So do not enable DFS if bluetooth modem sleep is in use.
*
* @return
* - ESP_OK : success