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Cordio: BLE thread loop fixes #44
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LGTM.
Fixes issues with async/callback code too.
facchinm
facchinm
approved these changes
Dec 2, 2019
Looks perfect, I'm merging it and then performing all the necessary power usage tests to make sure we didn't regress.
facchinm
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Dec 2, 2019
Restore BLE low power functionality after arduino-libraries/ArduinoBLE#44
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This resolves #33.
This pull request has two changes:
timer.start()in the BLE thread loop. Without this,timer.read_high_resolution_us()always returns 0.Note: the issue is also present in the mbed sample code the HCI transport was based on: https://github.com/ARMmbed/mbed-os-cordio-hci-passthrough/blob/fix-wsf-msg/main.cpp#L86 (@facchinm should we inform them?)
WSF_MS_PER_TICKneeds to match the value mbed was compiled with for the supervision timeout to match: https://github.com/ARMmbed/mbed-os/blob/19e762298f9a020606f7358539bb653be0de8e4f/features/FEATURE_BLE/targets/TARGET_CORDIO_LL/stack/controller/sources/ble/lctr/lctr_main_conn.c#L1168-L1174@facchinm I think we should measure the power consumption again. Then re-compile mbed if we need to adjust the value.
It's currently set to 1 ms:
however, the default appears to 10 ms: https://github.com/arduino/ArduinoCore-nRF528x-mbedos/blob/beac74ca3cd9d07363f66cf9cda6b143e4385cd2/cores/arduino/mbed/features/FEATURE_BLE/targets/TARGET_CORDIO/stack/wsf/include/wsf_timer.h#L40