third_party/NordicSemiconductor/drivers/doc/diagrams/sequence/rx_unicast.uml

@startuml

participant RADIO
participant Driver

      -> State: WaitingRxFrame
      
RADIO  -> Driver: EV: FRAMESTART
activate Driver
activate RADIO
Driver -> Mutex: lock
activate Mutex
Driver -> State: RxHeader
deactivate Driver

RADIO   -> Driver: EV: BCMATCH
activate Driver
Driver -->> RADIO: get_bcc()
RADIO  --> Driver: BCC_INIT
Driver  -> Driver: Check frame type: Data
Driver  -> Driver: Check dest address: short
Driver  -> RADIO:  set_bcc(BCC_SHORT_ADDR)
deactivate Driver

RADIO   -> Driver: EV: BCMATCH
activate Driver
Driver -->> RADIO: get_bcc()
RADIO  --> Driver: BCC_SHORT_ADDR
Driver  -> Driver: Check dest addr: Matched unicast
Driver  -> Flags:  ReceivingBroadcastFrame = false
Driver  -> State:  RxFrame
deactivate Driver

RADIO   -> RADIO:  EV: END / TASK: DISABLE
deactivate RADIO
RADIO   -> Driver: EV: END
activate Driver
Driver  -> Driver: Check CRC: OK
RADIO   -> RADIO:  EV: DISABLED / TASK: TXEN
Driver  -> Driver: Prepare ACK
Driver -->> Flags: receivigBroadcastFrame?
Flags  --> Driver: false
Driver  -> Driver: Check if ACK requested: true

Driver  -> State:  TxAck
Driver  -> Driver: set pending bit in ACK()
deactivate Driver

RADIO   -> Driver: EV: DISABLED

RADIO   -> RADIO:  EV: READY / TASK: START
activate RADIO

RADIO   -> Driver: EV: READY
activate Driver
Driver  -> RADIO:  disable_tifs_shorts_ack()
deactivate Driver

RADIO   -> Driver: EV: FRAMESTART
RADIO   -> RADIO:  EV: END / TASK: DISABLE
deactivate RADIO

RADIO   -> Driver: EV: END
activate Driver
Driver  -> RADIO:  disable_tifs_shorts_all()
Driver  -> State:  WaitingRxFrame
deactivate Driver


RADIO   -> Driver: EV: DISABLED
activate Driver
Driver  -> RADIO:  TASK: RXEN
Driver  -> Mutex:  unlock
deactivate Mutex
Driver  -> RADIO:  clear_event(DISABLED)
deactivate Driver
     
Driver  -> Higher_Layer: received()

@enduml