block/GPIOH:
  description: General-purpose I/Os.
  items:
  - name: MODER
    description: GPIO port mode register.
    byte_offset: 0
    fieldset: MODER
  - name: OTYPER
    description: GPIO port output type register.
    byte_offset: 4
    fieldset: OTYPER
  - name: OSPEEDR
    description: GPIO port output speed register.
    byte_offset: 8
    fieldset: OSPEEDR
  - name: PUPDR
    description: GPIO port pull-up/pull-down register.
    byte_offset: 12
    fieldset: PUPDR
  - name: IDR
    description: GPIO port input data register.
    byte_offset: 16
    access: Read
    fieldset: IDR
  - name: ODR
    description: GPIO port output data register.
    byte_offset: 20
    fieldset: ODR
  - name: BSRR
    description: GPIO port bit set/reset register.
    byte_offset: 24
    access: Write
    fieldset: BSRR
  - name: LCKR
    description: GPIO port configuration lock register.
    byte_offset: 28
    fieldset: LCKR
  - name: AFRL
    description: GPIO alternate function low register.
    byte_offset: 32
    fieldset: AFRL
  - name: AFRH
    description: GPIO alternate function high register.
    byte_offset: 36
    fieldset: AFRH
  - name: BRR
    description: port bit reset register.
    byte_offset: 40
    access: Write
    fieldset: BRR
fieldset/AFRH:
  description: GPIO alternate function high register.
  fields:
  - name: AFSEL8
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 0
    bit_size: 4
  - name: AFSEL9
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 4
    bit_size: 4
  - name: AFSEL10
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 8
    bit_size: 4
  - name: AFSEL11
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 12
    bit_size: 4
  - name: AFSEL12
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 16
    bit_size: 4
  - name: AFSEL13
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 20
    bit_size: 4
  - name: AFSEL14
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 24
    bit_size: 4
  - name: AFSEL15
    description: Alternate function selection for port x bit y (y = 8..15).
    bit_offset: 28
    bit_size: 4
fieldset/AFRL:
  description: GPIO alternate function low register.
  fields:
  - name: AFSEL0
    description: Alternate function selection for port x bit y (y = 0..7).
    bit_offset: 0
    bit_size: 4
  - name: AFSEL1
    description: Alternate function selection for port x bit y (y = 0..7).
    bit_offset: 4
    bit_size: 4
  - name: AFSEL3
    description: Alternate function selection for port x bit y (y = 0..7).
    bit_offset: 12
    bit_size: 4
fieldset/BRR:
  description: port bit reset register.
  fields:
  - name: BR0
    description: Port Reset bit.
    bit_offset: 0
    bit_size: 1
    enum: BRR_BR0
  - name: BR1
    description: Port Reset bit.
    bit_offset: 1
    bit_size: 1
    enum: BRR_BR1
  - name: BR3
    description: Port Reset bit.
    bit_offset: 3
    bit_size: 1
    enum: BRR_BR3
fieldset/BSRR:
  description: GPIO port bit set/reset register.
  fields:
  - name: BS0
    description: Port x set bit y (y= 0..15).
    bit_offset: 0
    bit_size: 1
    enum: BS0
  - name: BS1
    description: Port x set bit y (y= 0..15).
    bit_offset: 1
    bit_size: 1
    enum: BS1
  - name: BS3
    description: Port x set bit y (y= 0..15).
    bit_offset: 3
    bit_size: 1
    enum: BS3
  - name: BR0
    description: Port x set bit y (y= 0..15).
    bit_offset: 16
    bit_size: 1
    enum: BSRR_BR0
  - name: BR1
    description: Port x reset bit y (y = 0..15).
    bit_offset: 17
    bit_size: 1
    enum: BSRR_BR1
  - name: BR3
    description: Port x reset bit y (y = 0..15).
    bit_offset: 19
    bit_size: 1
    enum: BSRR_BR3
fieldset/IDR:
  description: GPIO port input data register.
  fields:
  - name: IDR0
    description: Port input data (y = 0..15).
    bit_offset: 0
    bit_size: 1
    enum: IDR0
  - name: IDR1
    description: Port input data (y = 0..15).
    bit_offset: 1
    bit_size: 1
    enum: IDR1
  - name: IDR3
    description: Port input data (y = 0..15).
    bit_offset: 3
    bit_size: 1
    enum: IDR3
fieldset/LCKR:
  description: GPIO port configuration lock register.
  fields:
  - name: LCK0
    description: Port x lock bit y (y= 0..15).
    bit_offset: 0
    bit_size: 1
    enum: LCK0
  - name: LCK1
    description: Port x lock bit y (y= 0..15).
    bit_offset: 1
    bit_size: 1
    enum: LCK1
  - name: LCK3
    description: Port x lock bit y (y= 0..15).
    bit_offset: 3
    bit_size: 1
    enum: LCK3
  - name: LCKK
    description: Port x lock bit y (y= 0..15).
    bit_offset: 16
    bit_size: 1
    enum: LCKK
fieldset/MODER:
  description: GPIO port mode register.
  fields:
  - name: MODER0
    description: Port x configuration bits (y = 0..15).
    bit_offset: 0
    bit_size: 2
    enum: MODER0
  - name: MODER1
    description: Port x configuration bits (y = 0..15).
    bit_offset: 2
    bit_size: 2
    enum: MODER1
  - name: MODER3
    description: Port x configuration bits (y = 0..15).
    bit_offset: 6
    bit_size: 2
    enum: MODER3
fieldset/ODR:
  description: GPIO port output data register.
  fields:
  - name: ODR0
    description: Port output data (y = 0..15).
    bit_offset: 0
    bit_size: 1
    enum: ODR0
  - name: ODR1
    description: Port output data (y = 0..15).
    bit_offset: 1
    bit_size: 1
    enum: ODR1
  - name: ODR3
    description: Port output data (y = 0..15).
    bit_offset: 3
    bit_size: 1
    enum: ODR3
fieldset/OSPEEDR:
  description: GPIO port output speed register.
  fields:
  - name: OSPEEDR0
    description: Port x configuration bits (y = 0..15).
    bit_offset: 0
    bit_size: 2
    enum: OSPEEDR0
  - name: OSPEEDR1
    description: Port x configuration bits (y = 0..15).
    bit_offset: 2
    bit_size: 2
    enum: OSPEEDR1
  - name: OSPEEDR3
    description: Port x configuration bits (y = 0..15).
    bit_offset: 6
    bit_size: 2
    enum: OSPEEDR3
fieldset/OTYPER:
  description: GPIO port output type register.
  fields:
  - name: OT0
    description: Port x configuration bits (y = 0..15).
    bit_offset: 0
    bit_size: 1
    enum: OT0
  - name: OT1
    description: Port x configuration bits (y = 0..15).
    bit_offset: 1
    bit_size: 1
    enum: OT1
  - name: OT3
    description: Port x configuration bits (y = 0..15).
    bit_offset: 3
    bit_size: 1
    enum: OT3
fieldset/PUPDR:
  description: GPIO port pull-up/pull-down register.
  fields:
  - name: PUPDR0
    description: Port x configuration bits (y = 0..15).
    bit_offset: 0
    bit_size: 2
    enum: PUPDR0
  - name: PUPDR1
    description: Port x configuration bits (y = 0..15).
    bit_offset: 2
    bit_size: 2
    enum: PUPDR1
  - name: PUPDR3
    description: Port x configuration bits (y = 0..15).
    bit_offset: 6
    bit_size: 2
    enum: PUPDR3
enum/BRR_BR0:
  bit_size: 1
  variants:
  - name: NoAction
    description: No action on the corresponding ODx bit.
    value: 0
  - name: Reset
    description: Reset the ODx bit.
    value: 1
enum/BRR_BR1:
  bit_size: 1
  variants:
  - name: NoAction
    description: No action on the corresponding ODx bit.
    value: 0
  - name: Reset
    description: Reset the ODx bit.
    value: 1
enum/BRR_BR3:
  bit_size: 1
  variants:
  - name: NoAction
    description: No action on the corresponding ODx bit.
    value: 0
  - name: Reset
    description: Reset the ODx bit.
    value: 1
enum/BS0:
  bit_size: 1
  variants:
  - name: Set
    description: Sets the corresponding ODRx bit.
    value: 1
enum/BS1:
  bit_size: 1
  variants:
  - name: Set
    description: Sets the corresponding ODRx bit.
    value: 1
enum/BS3:
  bit_size: 1
  variants:
  - name: Set
    description: Sets the corresponding ODRx bit.
    value: 1
enum/BSRR_BR0:
  bit_size: 1
  variants:
  - name: Reset
    description: Resets the corresponding ODRx bit.
    value: 1
enum/BSRR_BR1:
  bit_size: 1
  variants:
  - name: NoAction
    description: No action on the corresponding ODx bit.
    value: 0
  - name: Reset
    description: Reset the ODx bit.
    value: 1
enum/BSRR_BR3:
  bit_size: 1
  variants:
  - name: NoAction
    description: No action on the corresponding ODx bit.
    value: 0
  - name: Reset
    description: Reset the ODx bit.
    value: 1
enum/IDR0:
  bit_size: 1
  variants:
  - name: Low
    description: Input is logic low.
    value: 0
  - name: High
    description: Input is logic high.
    value: 1
enum/IDR1:
  bit_size: 1
  variants:
  - name: Low
    description: Input is logic low.
    value: 0
  - name: High
    description: Input is logic high.
    value: 1
enum/IDR3:
  bit_size: 1
  variants:
  - name: Low
    description: Input is logic low.
    value: 0
  - name: High
    description: Input is logic high.
    value: 1
enum/LCK0:
  bit_size: 1
  variants:
  - name: Unlocked
    description: Port configuration not locked.
    value: 0
  - name: Locked
    description: Port configuration locked.
    value: 1
enum/LCK1:
  bit_size: 1
  variants:
  - name: Unlocked
    description: Port configuration not locked.
    value: 0
  - name: Locked
    description: Port configuration locked.
    value: 1
enum/LCK3:
  bit_size: 1
  variants:
  - name: Unlocked
    description: Port configuration not locked.
    value: 0
  - name: Locked
    description: Port configuration locked.
    value: 1
enum/LCKK:
  bit_size: 1
  variants:
  - name: NotActive
    description: Port configuration lock key not active.
    value: 0
  - name: Active
    description: Port configuration lock key active.
    value: 1
enum/MODER0:
  bit_size: 2
  variants:
  - name: Input
    description: Input mode (reset state).
    value: 0
  - name: Output
    description: General purpose output mode.
    value: 1
  - name: Alternate
    description: Alternate function mode.
    value: 2
  - name: Analog
    description: Analog mode.
    value: 3
enum/MODER1:
  bit_size: 2
  variants:
  - name: Input
    description: Input mode (reset state).
    value: 0
  - name: Output
    description: General purpose output mode.
    value: 1
  - name: Alternate
    description: Alternate function mode.
    value: 2
  - name: Analog
    description: Analog mode.
    value: 3
enum/MODER3:
  bit_size: 2
  variants:
  - name: Input
    description: Input mode (reset state).
    value: 0
  - name: Output
    description: General purpose output mode.
    value: 1
  - name: Alternate
    description: Alternate function mode.
    value: 2
  - name: Analog
    description: Analog mode.
    value: 3
enum/ODR0:
  bit_size: 1
  variants:
  - name: Low
    description: Set output to logic low.
    value: 0
  - name: High
    description: Set output to logic high.
    value: 1
enum/ODR1:
  bit_size: 1
  variants:
  - name: Low
    description: Set output to logic low.
    value: 0
  - name: High
    description: Set output to logic high.
    value: 1
enum/ODR3:
  bit_size: 1
  variants:
  - name: Low
    description: Set output to logic low.
    value: 0
  - name: High
    description: Set output to logic high.
    value: 1
enum/OSPEEDR0:
  bit_size: 2
  variants:
  - name: LowSpeed
    description: Low speed.
    value: 0
  - name: MediumSpeed
    description: Medium speed.
    value: 1
  - name: HighSpeed
    description: High speed.
    value: 2
  - name: VeryHighSpeed
    description: Very high speed.
    value: 3
enum/OSPEEDR1:
  bit_size: 2
  variants:
  - name: LowSpeed
    description: Low speed.
    value: 0
  - name: MediumSpeed
    description: Medium speed.
    value: 1
  - name: HighSpeed
    description: High speed.
    value: 2
  - name: VeryHighSpeed
    description: Very high speed.
    value: 3
enum/OSPEEDR3:
  bit_size: 2
  variants:
  - name: LowSpeed
    description: Low speed.
    value: 0
  - name: MediumSpeed
    description: Medium speed.
    value: 1
  - name: HighSpeed
    description: High speed.
    value: 2
  - name: VeryHighSpeed
    description: Very high speed.
    value: 3
enum/OT0:
  bit_size: 1
  variants:
  - name: PushPull
    description: Output push-pull (reset state).
    value: 0
  - name: OpenDrain
    description: Output open-drain.
    value: 1
enum/OT1:
  bit_size: 1
  variants:
  - name: PushPull
    description: Output push-pull (reset state).
    value: 0
  - name: OpenDrain
    description: Output open-drain.
    value: 1
enum/OT3:
  bit_size: 1
  variants:
  - name: PushPull
    description: Output push-pull (reset state).
    value: 0
  - name: OpenDrain
    description: Output open-drain.
    value: 1
enum/PUPDR0:
  bit_size: 2
  variants:
  - name: Floating
    description: No pull-up, pull-down.
    value: 0
  - name: PullUp
    description: Pull-up.
    value: 1
  - name: PullDown
    description: Pull-down.
    value: 2
enum/PUPDR1:
  bit_size: 2
  variants:
  - name: Floating
    description: No pull-up, pull-down.
    value: 0
  - name: PullUp
    description: Pull-up.
    value: 1
  - name: PullDown
    description: Pull-down.
    value: 2
enum/PUPDR3:
  bit_size: 2
  variants:
  - name: Floating
    description: No pull-up, pull-down.
    value: 0
  - name: PullUp
    description: Pull-up.
    value: 1
  - name: PullDown
    description: Pull-down.
    value: 2