Struct ADC2 

pub struct ADC2 { /* private fields */ }

ADC2 peripheral

Implementations

impl ADC2

pub const unsafe fn steal() -> Peri<'static, Self>

Unsafely create an instance of this peripheral out of thin air.

Safety

You must ensure that you’re only using one instance of this type at a time.

Trait Implementations

impl AdcChannel<ADC2> for (Peri<'_, PA1>, Peri<'_, PA0>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PA4>, Peri<'_, PA5>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PA6>, Peri<'_, PA7>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PB1>, Peri<'_, PB0>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PC0>, Peri<'_, PC1>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PC1>, Peri<'_, PC2>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PC2>, Peri<'_, PC3>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PC4>, Peri<'_, PC5>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for (Peri<'_, PF13>, Peri<'_, PF14>)

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA0>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA1>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA2>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA3>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA4>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA5>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA6>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PA7>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PB0>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PB1>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PC0>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PC1>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PC2>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PC3>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PC4>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PC5>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PF13>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl AdcChannel<ADC2> for Peri<'_, PF14>

fn degrade_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

👎Deprecated: use reborrow_adc

fn reborrow_adc<'a>(&'a mut self) -> BorrowedAdcChannel<'a, T>

impl BasicInstance for ADC2

type Regs = Adc

impl Clone for ADC2

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ADC2

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Format for ADC2

where (): Format,

fn format(&self, f: Formatter<'_>)

Writes the defmt representation of self to fmt.

impl InjectedTrigger<ADC2> for EXTI15_TRG

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for LPTIM1_CH1

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for LPTIM2_CH1

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM15_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM1_CC4

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM1_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM1_TRGO2

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM2_CC1

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM2_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM3_CC1

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM3_CC3

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM3_CC4

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM3_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM4_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM6_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM8_CC4

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM8_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl InjectedTrigger<ADC2> for TIM8_TRGO2

fn signal(&self) -> u8

Get the signal number needed to use this trigger as InjectedTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl Instance for ADC2

type Interrupt = ADC2

impl RegularTrigger<ADC2> for EXTI11_TRG

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for EXTI15_TRG

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for LPTIM1_CH1

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for LPTIM2_CH1

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM15_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM1_CC1

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM1_CC2

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM1_CC3

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM1_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM1_TRGO2

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM2_CC2

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM2_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM3_CC4

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM3_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM4_CC4

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM4_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM6_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM8_TRGO

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RegularTrigger<ADC2> for TIM8_TRGO2

fn signal(&self) -> u8

Get the signal number needed to use this trigger as RegularTrigger. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

impl RxDma<ADC2> for GPDMA1_CH0

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA1_CH1

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA1_CH2

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA1_CH3

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA1_CH4

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA1_CH5

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA1_CH6

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA1_CH7

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH0

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH1

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH2

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH3

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH4

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH5

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH6

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl RxDma<ADC2> for GPDMA2_CH7

fn request(&self) -> Request

Get the DMA request number needed to use this channel as RxDma. Note: in some chips, ST calls this the “channel”, and calls channels “streams”. embassy-stm32 always uses the “channel” and “request number” names.

fn remap(&self)

Remap the DMA channel

impl Copy for ADC2

impl PeripheralType for ADC2

impl RccPeripheral for ADC2