hpio-0.8.0.4: Monads for GPIO in Haskell

Copyright(c) 2016 Drew Hess
LicenseBSD3
MaintainerDrew Hess <src@drewhess.com>
Stabilityexperimental
Portabilitynon-portable
Safe HaskellTrustworthy
LanguageHaskell2010

System.GPIO.Types

Contents

Description

Basic GPIO types.

Synopsis

GPIO pins

newtype Pin Source #

A GPIO pin, identified by pin number.

Note that GPIO pin numbering is platform- and runtime-dependent. See the documentation for your particular platform for an explanation of how pin numbers are assigned to physical pins.

Constructors

Pin Int 

Instances

Bounded Pin Source # 

Methods

minBound :: Pin #

maxBound :: Pin #

Enum Pin Source # 

Methods

succ :: Pin -> Pin #

pred :: Pin -> Pin #

toEnum :: Int -> Pin #

fromEnum :: Pin -> Int #

enumFrom :: Pin -> [Pin] #

enumFromThen :: Pin -> Pin -> [Pin] #

enumFromTo :: Pin -> Pin -> [Pin] #

enumFromThenTo :: Pin -> Pin -> Pin -> [Pin] #

Eq Pin Source # 

Methods

(==) :: Pin -> Pin -> Bool #

(/=) :: Pin -> Pin -> Bool #

Data Pin Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Pin -> c Pin #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Pin #

toConstr :: Pin -> Constr #

dataTypeOf :: Pin -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c Pin) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Pin) #

gmapT :: (forall b. Data b => b -> b) -> Pin -> Pin #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Pin -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Pin -> r #

gmapQ :: (forall d. Data d => d -> u) -> Pin -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> Pin -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Pin -> m Pin #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Pin -> m Pin #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Pin -> m Pin #

Ord Pin Source # 

Methods

compare :: Pin -> Pin -> Ordering #

(<) :: Pin -> Pin -> Bool #

(<=) :: Pin -> Pin -> Bool #

(>) :: Pin -> Pin -> Bool #

(>=) :: Pin -> Pin -> Bool #

max :: Pin -> Pin -> Pin #

min :: Pin -> Pin -> Pin #

Read Pin Source # 
Show Pin Source # 

Methods

showsPrec :: Int -> Pin -> ShowS #

show :: Pin -> String #

showList :: [Pin] -> ShowS #

Ix Pin Source # 

Methods

range :: (Pin, Pin) -> [Pin] #

index :: (Pin, Pin) -> Pin -> Int #

unsafeIndex :: (Pin, Pin) -> Pin -> Int

inRange :: (Pin, Pin) -> Pin -> Bool #

rangeSize :: (Pin, Pin) -> Int #

unsafeRangeSize :: (Pin, Pin) -> Int

Generic Pin Source # 

Associated Types

type Rep Pin :: * -> * #

Methods

from :: Pin -> Rep Pin x #

to :: Rep Pin x -> Pin #

Arbitrary Pin Source # 

Methods

arbitrary :: Gen Pin #

shrink :: Pin -> [Pin] #

type Rep Pin Source # 
type Rep Pin = D1 (MetaData "Pin" "System.GPIO.Types" "hpio-0.8.0.4-GJzojGXJbp82GVXKhRl2KX" True) (C1 (MetaCons "Pin" PrefixI False) (S1 (MetaSel (Nothing Symbol) NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 Int)))

data PinInputMode Source #

GPIO pins may support a number of different physical configurations when used as a digital input.

Pins that are capable of input will at least support the InputDefault mode. InputDefault mode is special in that, unlike the other input modes, it does not represent a unique physical configuration, but is simply a pseudonym for another (actual) input mode. Exactly which mode is used by the hardware when InputDefault mode is specified is platform-dependent. By using InputDefaut mode, you are saying that you don't care about the pin's actual configuration, other than the fact that it's being used for input.

Constructors

InputDefault

The pin's default input mode, i.e., the mode used when a more specific mode is not specified

InputFloating

A floating / high-impedance / tri-state mode which uses little power, but when disconnected, may cause the pin's value to be indeterminate

InputPullUp

The pin is connected to an internal pull-up resistor such that, when the pin is disconnected or connected to a floating / high-impedance node, its physical value will be High

InputPullDown

The pin is connected to an internal pull-down resistor such that, when the pin is disconnected or connected to a floating / high-impedance node, its physical value will be Low

Instances

Bounded PinInputMode Source # 
Enum PinInputMode Source # 
Eq PinInputMode Source # 
Data PinInputMode Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PinInputMode -> c PinInputMode #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PinInputMode #

toConstr :: PinInputMode -> Constr #

dataTypeOf :: PinInputMode -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c PinInputMode) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PinInputMode) #

gmapT :: (forall b. Data b => b -> b) -> PinInputMode -> PinInputMode #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PinInputMode -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PinInputMode -> r #

gmapQ :: (forall d. Data d => d -> u) -> PinInputMode -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> PinInputMode -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> PinInputMode -> m PinInputMode #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PinInputMode -> m PinInputMode #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PinInputMode -> m PinInputMode #

Ord PinInputMode Source # 
Read PinInputMode Source # 
Show PinInputMode Source # 
Generic PinInputMode Source # 

Associated Types

type Rep PinInputMode :: * -> * #

type Rep PinInputMode Source # 
type Rep PinInputMode = D1 (MetaData "PinInputMode" "System.GPIO.Types" "hpio-0.8.0.4-GJzojGXJbp82GVXKhRl2KX" False) ((:+:) ((:+:) (C1 (MetaCons "InputDefault" PrefixI False) U1) (C1 (MetaCons "InputFloating" PrefixI False) U1)) ((:+:) (C1 (MetaCons "InputPullUp" PrefixI False) U1) (C1 (MetaCons "InputPullDown" PrefixI False) U1)))

data PinOutputMode Source #

GPIO pins may support a number of different physical configurations when used as a digital output.

Pins that are capable of output will at least support the OutputDefault mode. OutputDefault mode is special in that, unlike the other output modes, it does not represent a unique physical configuration, but is simply a pseudonym for another (actual) output mode. Exactly which mode is used by the hardware when OutputDefault mode is specified is platform-dependent. By using OutputDefaut mode, you are saying that you don't care about the pin's actual configuration, other than the fact that it's being used for output.

Constructors

OutputDefault

The pin's default output mode, i.e., the mode used when a more specific mode is not specified

OutputPushPull

The output actively drives both the High and Low states

OutputOpenDrain

The output actively drives the Low state, but High is left floating (also known as open collector)

OutputOpenDrainPullUp

The output actively drives the Low state, and is connected to an internal pull-up resistor in the High state.

OutputOpenSource

The output actively drives the High state, but Low is left floating (also known as open emitter)

OutputOpenSourcePullDown

The output actively drives the High state, and is connected to an internal pull-down resistor in the Low state.

Instances

Bounded PinOutputMode Source # 
Enum PinOutputMode Source # 
Eq PinOutputMode Source # 
Data PinOutputMode Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PinOutputMode -> c PinOutputMode #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PinOutputMode #

toConstr :: PinOutputMode -> Constr #

dataTypeOf :: PinOutputMode -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c PinOutputMode) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PinOutputMode) #

gmapT :: (forall b. Data b => b -> b) -> PinOutputMode -> PinOutputMode #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PinOutputMode -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PinOutputMode -> r #

gmapQ :: (forall d. Data d => d -> u) -> PinOutputMode -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> PinOutputMode -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> PinOutputMode -> m PinOutputMode #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PinOutputMode -> m PinOutputMode #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PinOutputMode -> m PinOutputMode #

Ord PinOutputMode Source # 
Read PinOutputMode Source # 
Show PinOutputMode Source # 
Generic PinOutputMode Source # 

Associated Types

type Rep PinOutputMode :: * -> * #

type Rep PinOutputMode Source # 
type Rep PinOutputMode = D1 (MetaData "PinOutputMode" "System.GPIO.Types" "hpio-0.8.0.4-GJzojGXJbp82GVXKhRl2KX" False) ((:+:) ((:+:) (C1 (MetaCons "OutputDefault" PrefixI False) U1) ((:+:) (C1 (MetaCons "OutputPushPull" PrefixI False) U1) (C1 (MetaCons "OutputOpenDrain" PrefixI False) U1))) ((:+:) (C1 (MetaCons "OutputOpenDrainPullUp" PrefixI False) U1) ((:+:) (C1 (MetaCons "OutputOpenSource" PrefixI False) U1) (C1 (MetaCons "OutputOpenSourcePullDown" PrefixI False) U1))))

data PinCapabilities Source #

Catalog a pin's capabilities.

Constructors

PinCapabilities 

Fields

data PinDirection Source #

A pin's direction (input/output).

Constructors

In 
Out 

Instances

Bounded PinDirection Source # 
Enum PinDirection Source # 
Eq PinDirection Source # 
Data PinDirection Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PinDirection -> c PinDirection #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PinDirection #

toConstr :: PinDirection -> Constr #

dataTypeOf :: PinDirection -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c PinDirection) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PinDirection) #

gmapT :: (forall b. Data b => b -> b) -> PinDirection -> PinDirection #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PinDirection -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PinDirection -> r #

gmapQ :: (forall d. Data d => d -> u) -> PinDirection -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> PinDirection -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> PinDirection -> m PinDirection #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PinDirection -> m PinDirection #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PinDirection -> m PinDirection #

Ord PinDirection Source # 
Read PinDirection Source # 
Show PinDirection Source # 
Ix PinDirection Source # 
Generic PinDirection Source # 

Associated Types

type Rep PinDirection :: * -> * #

Arbitrary PinDirection Source # 
type Rep PinDirection Source # 
type Rep PinDirection = D1 (MetaData "PinDirection" "System.GPIO.Types" "hpio-0.8.0.4-GJzojGXJbp82GVXKhRl2KX" False) ((:+:) (C1 (MetaCons "In" PrefixI False) U1) (C1 (MetaCons "Out" PrefixI False) U1))

data PinActiveLevel Source #

A pin's active level (active-high/active-low).

Constructors

ActiveLow 
ActiveHigh 

Instances

Bounded PinActiveLevel Source # 
Enum PinActiveLevel Source # 
Eq PinActiveLevel Source # 
Data PinActiveLevel Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PinActiveLevel -> c PinActiveLevel #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PinActiveLevel #

toConstr :: PinActiveLevel -> Constr #

dataTypeOf :: PinActiveLevel -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c PinActiveLevel) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PinActiveLevel) #

gmapT :: (forall b. Data b => b -> b) -> PinActiveLevel -> PinActiveLevel #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PinActiveLevel -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PinActiveLevel -> r #

gmapQ :: (forall d. Data d => d -> u) -> PinActiveLevel -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> PinActiveLevel -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> PinActiveLevel -> m PinActiveLevel #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PinActiveLevel -> m PinActiveLevel #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PinActiveLevel -> m PinActiveLevel #

Ord PinActiveLevel Source # 
Read PinActiveLevel Source # 
Show PinActiveLevel Source # 
Ix PinActiveLevel Source # 
Generic PinActiveLevel Source # 

Associated Types

type Rep PinActiveLevel :: * -> * #

Arbitrary PinActiveLevel Source # 
type Rep PinActiveLevel Source # 
type Rep PinActiveLevel = D1 (MetaData "PinActiveLevel" "System.GPIO.Types" "hpio-0.8.0.4-GJzojGXJbp82GVXKhRl2KX" False) ((:+:) (C1 (MetaCons "ActiveLow" PrefixI False) U1) (C1 (MetaCons "ActiveHigh" PrefixI False) U1))

data PinValue Source #

A pin's signal level as a binary value.

Constructors

Low 
High 

Instances

Bounded PinValue Source # 
Enum PinValue Source # 
Eq PinValue Source # 
Data PinValue Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PinValue -> c PinValue #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PinValue #

toConstr :: PinValue -> Constr #

dataTypeOf :: PinValue -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c PinValue) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PinValue) #

gmapT :: (forall b. Data b => b -> b) -> PinValue -> PinValue #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PinValue -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PinValue -> r #

gmapQ :: (forall d. Data d => d -> u) -> PinValue -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> PinValue -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> PinValue -> m PinValue #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PinValue -> m PinValue #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PinValue -> m PinValue #

Ord PinValue Source # 
Read PinValue Source # 
Show PinValue Source # 
Ix PinValue Source # 
Generic PinValue Source # 

Associated Types

type Rep PinValue :: * -> * #

Methods

from :: PinValue -> Rep PinValue x #

to :: Rep PinValue x -> PinValue #

Arbitrary PinValue Source # 
Bits PinValue Source # 
FiniteBits PinValue Source # 
type Rep PinValue Source # 
type Rep PinValue = D1 (MetaData "PinValue" "System.GPIO.Types" "hpio-0.8.0.4-GJzojGXJbp82GVXKhRl2KX" False) ((:+:) (C1 (MetaCons "Low" PrefixI False) U1) (C1 (MetaCons "High" PrefixI False) U1))

data PinInterruptMode Source #

A pin's interrupt mode.

Note that the pin's interrupt mode is defined in terms of the pin's logical signal value; i.e., when the pin is configured for active-low logic, RisingEdge refers to the physical signal's trailing edge, and FallingEdge refers to the physical signal's rising edge.

Constructors

Disabled

Interrupts are disabled

RisingEdge

Interrupt on the pin's (logical) rising edge

FallingEdge

Interrupt on the pin's (logical) falling edge

Level

Interrupt on any change to the pin's signal level

Instances

Bounded PinInterruptMode Source # 
Enum PinInterruptMode Source # 
Eq PinInterruptMode Source # 
Data PinInterruptMode Source # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PinInterruptMode -> c PinInterruptMode #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PinInterruptMode #

toConstr :: PinInterruptMode -> Constr #

dataTypeOf :: PinInterruptMode -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c PinInterruptMode) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PinInterruptMode) #

gmapT :: (forall b. Data b => b -> b) -> PinInterruptMode -> PinInterruptMode #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PinInterruptMode -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PinInterruptMode -> r #

gmapQ :: (forall d. Data d => d -> u) -> PinInterruptMode -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> PinInterruptMode -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> PinInterruptMode -> m PinInterruptMode #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PinInterruptMode -> m PinInterruptMode #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PinInterruptMode -> m PinInterruptMode #

Ord PinInterruptMode Source # 
Read PinInterruptMode Source # 
Show PinInterruptMode Source # 
Generic PinInterruptMode Source # 
Arbitrary PinInterruptMode Source # 
type Rep PinInterruptMode Source # 
type Rep PinInterruptMode = D1 (MetaData "PinInterruptMode" "System.GPIO.Types" "hpio-0.8.0.4-GJzojGXJbp82GVXKhRl2KX" False) ((:+:) ((:+:) (C1 (MetaCons "Disabled" PrefixI False) U1) (C1 (MetaCons "RisingEdge" PrefixI False) U1)) ((:+:) (C1 (MetaCons "FallingEdge" PrefixI False) U1) (C1 (MetaCons "Level" PrefixI False) U1)))

Convenience functions

pinNumber :: Pin -> Int Source #

Get the pin number as an Int.

>>> pinNumber (Pin 5)
5

invertDirection :: PinDirection -> PinDirection Source #

Invert a PinDirection value.

>>> invertDirection In
Out
>>> invertDirection Out
In

invertValue :: PinValue -> PinValue Source #

Invert a PinValue.

>>> invertValue High
Low
>>> invertValue Low
High

PinValue conversion to/from Bool

valueToBool :: PinValue -> Bool Source #

Convert a PinValue to its logical boolean equivalent.

>>> valueToBool High
True
>>> valueToBool Low
False

boolToValue :: Bool -> PinValue Source #

Convert a Bool to its logical PinValue equivalent.

>>> boolToValue True
High
>>> boolToValue False
Low

GPIO exceptions