[wip] nimble/ll: Add initial Channel Sounding scheduling #1789
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A dedicated CS DRBG is used to coordinate the randomization of several transaction types during a CS procedure.
The BT specification provides sample data that can be used to test the correctness of a CS DRBG implementation.
ble_cs.c contains initial implementation that caused warnings when running command: newt test @apache-mynewt-nimble/nimble
Latest spec draft contains Optional_TX_SNR_Capability field as a CS capability. Companion signal parameter was removed.
Initialize the CS state machine with the connection state machine.
Add lengths and opcodes of Channel Sounding LL CTRL PDUs.
Implement the LE CS Read Local Supported Capabilities command. Enable basic CS capabilities in local controller.
Implements: - LE CS Read Remote Supported Capabilities command, - LE CS Write Cached Remote Supported Capabilities command.
The HCI_LE_CS_Set_Default_Settings command is used by a Host to set default CS settings in the local Controller for the connection.
Implements: - LE CS Read Remote FAE Table command - LE CS Write Cached Remote FAE Table command
Implements: - LE CS Create Config command - LE CS Remove Config command
Implements LE CS Security Enable command.
Add initial usage of LL scheduler and typical radio events.
Initial logic of transition between CS step states.
If devices supports multiple antennas, they can be used and switched during CS tones transmission/reception.
Initial logic of next step mode selection.
- CS SYNC sequence generation - CS Access Address matching
- Turn off CS tones - Limit channels to 0-39 - Skip CS tones - Accept the risk of being late
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