block/USART1:
  description: Universal synchronous asynchronous receiver transmitter.
  items:
  - name: CR1
    description: Control register 1.
    byte_offset: 0
    fieldset: CR1
  - name: CR2
    description: Control register 2.
    byte_offset: 4
    fieldset: CR2
  - name: CR3
    description: Control register 3.
    byte_offset: 8
    fieldset: CR3
  - name: BRR
    description: Baud rate register.
    byte_offset: 12
    fieldset: BRR
  - name: GTPR
    description: Guard time and prescaler register.
    byte_offset: 16
    fieldset: GTPR
  - name: RTOR
    description: Receiver timeout register.
    byte_offset: 20
    fieldset: RTOR
  - name: RQR
    description: Request register.
    byte_offset: 24
    access: Write
    fieldset: RQR
  - name: ISR
    description: Interrupt & status register.
    byte_offset: 28
    access: Read
    fieldset: ISR
  - name: ICR
    description: Interrupt flag clear register.
    byte_offset: 32
    access: Write
    fieldset: ICR
  - name: RDR
    description: Receive data register.
    byte_offset: 36
    access: Read
    fieldset: RDR
  - name: TDR
    description: Transmit data register.
    byte_offset: 40
    fieldset: TDR
  - name: PRESC
    description: Prescaler register.
    byte_offset: 44
    fieldset: PRESC
  - name: HWCFGR2
    description: USART Hardware Configuration register 2.
    byte_offset: 1004
    access: Read
    fieldset: HWCFGR2
  - name: HWCFGR1
    description: USART Hardware Configuration register 1.
    byte_offset: 1008
    access: Read
    fieldset: HWCFGR1
  - name: VERR
    description: EXTI IP Version register.
    byte_offset: 1012
    access: Read
    fieldset: VERR
  - name: IPIDR
    description: EXTI Identification register.
    byte_offset: 1016
    access: Read
    fieldset: IPIDR
  - name: SIDR
    description: EXTI Size ID register.
    byte_offset: 1020
    access: Read
    fieldset: SIDR
fieldset/BRR:
  description: Baud rate register.
  fields:
  - name: BRR_0_3
    description: BRR_0_3.
    bit_offset: 0
    bit_size: 4
  - name: BRR_4_15
    description: BRR_4_15.
    bit_offset: 4
    bit_size: 12
fieldset/CR1:
  description: Control register 1.
  fields:
  - name: UE
    description: USART enable.
    bit_offset: 0
    bit_size: 1
  - name: UESM
    description: USART enable in Stop mode.
    bit_offset: 1
    bit_size: 1
  - name: RE
    description: Receiver enable.
    bit_offset: 2
    bit_size: 1
  - name: TE
    description: Transmitter enable.
    bit_offset: 3
    bit_size: 1
  - name: IDLEIE
    description: IDLE interrupt enable.
    bit_offset: 4
    bit_size: 1
  - name: RXNEIE
    description: RXNE interrupt enable.
    bit_offset: 5
    bit_size: 1
  - name: TCIE
    description: Transmission complete interrupt enable.
    bit_offset: 6
    bit_size: 1
  - name: TXEIE
    description: interrupt enable.
    bit_offset: 7
    bit_size: 1
  - name: PEIE
    description: PE interrupt enable.
    bit_offset: 8
    bit_size: 1
  - name: PS
    description: Parity selection.
    bit_offset: 9
    bit_size: 1
  - name: PCE
    description: Parity control enable.
    bit_offset: 10
    bit_size: 1
  - name: WAKE
    description: Receiver wakeup method.
    bit_offset: 11
    bit_size: 1
  - name: M0
    description: Word length.
    bit_offset: 12
    bit_size: 1
  - name: MME
    description: Mute mode enable.
    bit_offset: 13
    bit_size: 1
  - name: CMIE
    description: Character match interrupt enable.
    bit_offset: 14
    bit_size: 1
  - name: OVER8
    description: Oversampling mode.
    bit_offset: 15
    bit_size: 1
  - name: DEDT
    description: DEDT.
    bit_offset: 16
    bit_size: 5
  - name: DEAT
    description: DEAT.
    bit_offset: 21
    bit_size: 5
  - name: RTOIE
    description: Receiver timeout interrupt enable.
    bit_offset: 26
    bit_size: 1
  - name: EOBIE
    description: End of Block interrupt enable.
    bit_offset: 27
    bit_size: 1
  - name: M1
    description: Word length.
    bit_offset: 28
    bit_size: 1
  - name: FIFOEN
    description: FIFO mode enable.
    bit_offset: 29
    bit_size: 1
  - name: TXFEIE
    description: TXFIFO empty interrupt enable.
    bit_offset: 30
    bit_size: 1
  - name: RXFFIE
    description: RXFIFO Full interrupt enable.
    bit_offset: 31
    bit_size: 1
fieldset/CR2:
  description: Control register 2.
  fields:
  - name: SLVEN
    description: Synchronous Slave mode enable.
    bit_offset: 0
    bit_size: 1
  - name: DIS_NSS
    description: When the DSI_NSS bit is set, the NSS pin input will be ignored.
    bit_offset: 3
    bit_size: 1
  - name: ADDM7
    description: 7-bit Address Detection/4-bit Address Detection.
    bit_offset: 4
    bit_size: 1
  - name: LBDL
    description: LIN break detection length.
    bit_offset: 5
    bit_size: 1
  - name: LBDIE
    description: LIN break detection interrupt enable.
    bit_offset: 6
    bit_size: 1
  - name: LBCL
    description: Last bit clock pulse.
    bit_offset: 8
    bit_size: 1
  - name: CPHA
    description: Clock phase.
    bit_offset: 9
    bit_size: 1
  - name: CPOL
    description: Clock polarity.
    bit_offset: 10
    bit_size: 1
  - name: CLKEN
    description: Clock enable.
    bit_offset: 11
    bit_size: 1
  - name: STOP
    description: STOP bits.
    bit_offset: 12
    bit_size: 2
  - name: LINEN
    description: LIN mode enable.
    bit_offset: 14
    bit_size: 1
  - name: SWAP
    description: Swap TX/RX pins.
    bit_offset: 15
    bit_size: 1
  - name: RXINV
    description: RX pin active level inversion.
    bit_offset: 16
    bit_size: 1
  - name: TXINV
    description: TX pin active level inversion.
    bit_offset: 17
    bit_size: 1
  - name: TAINV
    description: Binary data inversion.
    bit_offset: 18
    bit_size: 1
  - name: MSBFIRST
    description: Most significant bit first.
    bit_offset: 19
    bit_size: 1
  - name: ABREN
    description: Auto baud rate enable.
    bit_offset: 20
    bit_size: 1
  - name: ABRMOD
    description: Auto baud rate mode.
    bit_offset: 21
    bit_size: 2
  - name: RTOEN
    description: Receiver timeout enable.
    bit_offset: 23
    bit_size: 1
  - name: ADD0_3
    description: Address of the USART node.
    bit_offset: 24
    bit_size: 4
  - name: ADD4_7
    description: Address of the USART node.
    bit_offset: 28
    bit_size: 4
fieldset/CR3:
  description: Control register 3.
  fields:
  - name: EIE
    description: Error interrupt enable.
    bit_offset: 0
    bit_size: 1
  - name: IREN
    description: Ir mode enable.
    bit_offset: 1
    bit_size: 1
  - name: IRLP
    description: Ir low-power.
    bit_offset: 2
    bit_size: 1
  - name: HDSEL
    description: Half-duplex selection.
    bit_offset: 3
    bit_size: 1
  - name: NACK
    description: Smartcard NACK enable.
    bit_offset: 4
    bit_size: 1
  - name: SCEN
    description: Smartcard mode enable.
    bit_offset: 5
    bit_size: 1
  - name: DMAR
    description: DMA enable receiver.
    bit_offset: 6
    bit_size: 1
  - name: DMAT
    description: DMA enable transmitter.
    bit_offset: 7
    bit_size: 1
  - name: RTSE
    description: RTS enable.
    bit_offset: 8
    bit_size: 1
  - name: CTSE
    description: CTS enable.
    bit_offset: 9
    bit_size: 1
  - name: CTSIE
    description: CTS interrupt enable.
    bit_offset: 10
    bit_size: 1
  - name: ONEBIT
    description: One sample bit method enable.
    bit_offset: 11
    bit_size: 1
  - name: OVRDIS
    description: Overrun Disable.
    bit_offset: 12
    bit_size: 1
  - name: DDRE
    description: DMA Disable on Reception Error.
    bit_offset: 13
    bit_size: 1
  - name: DEM
    description: Driver enable mode.
    bit_offset: 14
    bit_size: 1
  - name: DEP
    description: Driver enable polarity selection.
    bit_offset: 15
    bit_size: 1
  - name: SCARCNT
    description: Smartcard auto-retry count.
    bit_offset: 17
    bit_size: 3
  - name: WUS
    description: Wakeup from Stop mode interrupt flag selection.
    bit_offset: 20
    bit_size: 2
  - name: WUFIE
    description: Wakeup from Stop mode interrupt enable.
    bit_offset: 22
    bit_size: 1
  - name: TXFTIE
    description: threshold interrupt enable.
    bit_offset: 23
    bit_size: 1
  - name: TCBGTIE
    description: Tr Complete before guard time, interrupt enable.
    bit_offset: 24
    bit_size: 1
  - name: RXFTCFG
    description: Receive FIFO threshold configuration.
    bit_offset: 25
    bit_size: 3
  - name: RXFTIE
    description: RXFIFO threshold interrupt enable.
    bit_offset: 28
    bit_size: 1
  - name: TXFTCFG
    description: TXFIFO threshold configuration.
    bit_offset: 29
    bit_size: 3
fieldset/GTPR:
  description: Guard time and prescaler register.
  fields:
  - name: PSC
    description: Prescaler value.
    bit_offset: 0
    bit_size: 8
  - name: GT
    description: Guard time value.
    bit_offset: 8
    bit_size: 8
fieldset/HWCFGR1:
  description: USART Hardware Configuration register 1.
  fields:
  - name: CFG1
    description: CFG1.
    bit_offset: 0
    bit_size: 4
  - name: CFG2
    description: CFG2.
    bit_offset: 4
    bit_size: 4
  - name: CFG3
    description: CFG3.
    bit_offset: 8
    bit_size: 4
  - name: CFG4
    description: CFG4.
    bit_offset: 12
    bit_size: 4
  - name: CFG5
    description: CFG5.
    bit_offset: 16
    bit_size: 4
  - name: CFG6
    description: CFG6.
    bit_offset: 20
    bit_size: 4
  - name: CFG7
    description: CFG7.
    bit_offset: 24
    bit_size: 4
  - name: CFG8
    description: CFG8.
    bit_offset: 28
    bit_size: 4
fieldset/HWCFGR2:
  description: USART Hardware Configuration register 2.
  fields:
  - name: CFG1
    description: CFG1.
    bit_offset: 0
    bit_size: 4
  - name: CFG2
    description: CFG2.
    bit_offset: 4
    bit_size: 4
fieldset/ICR:
  description: Interrupt flag clear register.
  fields:
  - name: PECF
    description: Parity error clear flag.
    bit_offset: 0
    bit_size: 1
  - name: FECF
    description: Framing error clear flag.
    bit_offset: 1
    bit_size: 1
  - name: NCF
    description: Noise detected clear flag.
    bit_offset: 2
    bit_size: 1
  - name: ORECF
    description: Overrun error clear flag.
    bit_offset: 3
    bit_size: 1
  - name: IDLECF
    description: Idle line detected clear flag.
    bit_offset: 4
    bit_size: 1
  - name: TXFECF
    description: TXFIFO empty clear flag.
    bit_offset: 5
    bit_size: 1
  - name: TCCF
    description: Transmission complete clear flag.
    bit_offset: 6
    bit_size: 1
  - name: TCBGTCF
    description: Transmission complete before Guard time clear flag.
    bit_offset: 7
    bit_size: 1
  - name: LBDCF
    description: LIN break detection clear flag.
    bit_offset: 8
    bit_size: 1
  - name: CTSCF
    description: CTS clear flag.
    bit_offset: 9
    bit_size: 1
  - name: RTOCF
    description: Receiver timeout clear flag.
    bit_offset: 11
    bit_size: 1
  - name: EOBCF
    description: End of block clear flag.
    bit_offset: 12
    bit_size: 1
  - name: UDRCF
    description: SPI slave underrun clear flag.
    bit_offset: 13
    bit_size: 1
  - name: CMCF
    description: Character match clear flag.
    bit_offset: 17
    bit_size: 1
  - name: WUCF
    description: Wakeup from Stop mode clear flag.
    bit_offset: 20
    bit_size: 1
fieldset/IPIDR:
  description: EXTI Identification register.
  fields:
  - name: IPID
    description: IP Identification.
    bit_offset: 0
    bit_size: 32
fieldset/ISR:
  description: Interrupt & status register.
  fields:
  - name: PE
    description: PE.
    bit_offset: 0
    bit_size: 1
  - name: FE
    description: FE.
    bit_offset: 1
    bit_size: 1
  - name: NF
    description: NF.
    bit_offset: 2
    bit_size: 1
  - name: ORE
    description: ORE.
    bit_offset: 3
    bit_size: 1
  - name: IDLE
    description: IDLE.
    bit_offset: 4
    bit_size: 1
  - name: RXNE
    description: RXNE.
    bit_offset: 5
    bit_size: 1
  - name: TC
    description: TC.
    bit_offset: 6
    bit_size: 1
  - name: TXE
    description: TXE.
    bit_offset: 7
    bit_size: 1
  - name: LBDF
    description: LBDF.
    bit_offset: 8
    bit_size: 1
  - name: CTSIF
    description: CTSIF.
    bit_offset: 9
    bit_size: 1
  - name: CTS
    description: CTS.
    bit_offset: 10
    bit_size: 1
  - name: RTOF
    description: RTOF.
    bit_offset: 11
    bit_size: 1
  - name: EOBF
    description: EOBF.
    bit_offset: 12
    bit_size: 1
  - name: UDR
    description: SPI slave underrun error flag.
    bit_offset: 13
    bit_size: 1
  - name: ABRE
    description: ABRE.
    bit_offset: 14
    bit_size: 1
  - name: ABRF
    description: ABRF.
    bit_offset: 15
    bit_size: 1
  - name: BUSY
    description: BUSY.
    bit_offset: 16
    bit_size: 1
  - name: CMF
    description: CMF.
    bit_offset: 17
    bit_size: 1
  - name: SBKF
    description: SBKF.
    bit_offset: 18
    bit_size: 1
  - name: RWU
    description: RWU.
    bit_offset: 19
    bit_size: 1
  - name: WUF
    description: WUF.
    bit_offset: 20
    bit_size: 1
  - name: TEACK
    description: TEACK.
    bit_offset: 21
    bit_size: 1
  - name: REACK
    description: REACK.
    bit_offset: 22
    bit_size: 1
  - name: TXFE
    description: TXFIFO Empty.
    bit_offset: 23
    bit_size: 1
  - name: RXFF
    description: RXFIFO Full.
    bit_offset: 24
    bit_size: 1
  - name: TCBGT
    description: Transmission complete before guard time flag.
    bit_offset: 25
    bit_size: 1
  - name: RXFT
    description: RXFIFO threshold flag.
    bit_offset: 26
    bit_size: 1
  - name: TXFT
    description: TXFIFO threshold flag.
    bit_offset: 27
    bit_size: 1
fieldset/PRESC:
  description: Prescaler register.
  fields:
  - name: PRESCALER
    description: Clock prescaler.
    bit_offset: 0
    bit_size: 4
fieldset/RDR:
  description: Receive data register.
  fields:
  - name: RDR
    description: Receive data value.
    bit_offset: 0
    bit_size: 9
fieldset/RQR:
  description: Request register.
  fields:
  - name: ABRRQ
    description: Auto baud rate request.
    bit_offset: 0
    bit_size: 1
  - name: SBKRQ
    description: Send break request.
    bit_offset: 1
    bit_size: 1
  - name: MMRQ
    description: Mute mode request.
    bit_offset: 2
    bit_size: 1
  - name: RXFRQ
    description: Receive data flush request.
    bit_offset: 3
    bit_size: 1
  - name: TXFRQ
    description: Transmit data flush request.
    bit_offset: 4
    bit_size: 1
fieldset/RTOR:
  description: Receiver timeout register.
  fields:
  - name: RTO
    description: Receiver timeout value.
    bit_offset: 0
    bit_size: 24
  - name: BLEN
    description: Block Length.
    bit_offset: 24
    bit_size: 8
fieldset/SIDR:
  description: EXTI Size ID register.
  fields:
  - name: SID
    description: Size Identification.
    bit_offset: 0
    bit_size: 32
fieldset/TDR:
  description: Transmit data register.
  fields:
  - name: TDR
    description: Transmit data value.
    bit_offset: 0
    bit_size: 9
fieldset/VERR:
  description: EXTI IP Version register.
  fields:
  - name: MINREV
    description: Minor Revision number.
    bit_offset: 0
    bit_size: 4
  - name: MAJREV
    description: Major Revision number.
    bit_offset: 4
    bit_size: 4