Copyright | (C) 2013-2016 University of Twente 2017-2019 Myrtle Software Ltd 2017 Google Inc. 2021 QBayLogic B.V. |
---|---|
License | BSD2 (see the file LICENSE) |
Maintainer | QBayLogic B.V. <devops@qbaylogic.com> |
Safe Haskell | Unsafe |
Language | Haskell2010 |
Extensions |
|
Synopsis
- data Signal (dom :: Domain) a = a :- (Signal dom a)
- head# :: Signal dom a -> a
- tail# :: Signal dom a -> Signal dom a
- type Domain = Symbol
- sameDomain :: forall (domA :: Domain) (domB :: Domain). (KnownDomain domA, KnownDomain domB) => Maybe (domA :~: domB)
- class KnownSymbol dom => KnownDomain (dom :: Domain) where
- type KnownConf dom :: DomainConfiguration
- knownDomain :: SDomainConfiguration dom (KnownConf dom)
- type KnownConfiguration dom conf = (KnownDomain dom, KnownConf dom ~ conf)
- knownDomainByName :: forall dom. KnownDomain dom => SSymbol dom -> SDomainConfiguration dom (KnownConf dom)
- data ActiveEdge
- data SActiveEdge (edge :: ActiveEdge) where
- data InitBehavior
- data SInitBehavior (init :: InitBehavior) where
- data ResetKind
- data SResetKind (resetKind :: ResetKind) where
- data ResetPolarity
- data SResetPolarity (polarity :: ResetPolarity) where
- data DomainConfiguration = DomainConfiguration {}
- data SDomainConfiguration (dom :: Domain) (conf :: DomainConfiguration) where
- SDomainConfiguration :: SSymbol dom -> SNat period -> SActiveEdge edge -> SResetKind reset -> SInitBehavior init -> SResetPolarity polarity -> SDomainConfiguration dom ('DomainConfiguration dom period edge reset init polarity)
- type DomainPeriod (dom :: Domain) = DomainConfigurationPeriod (KnownConf dom)
- type DomainActiveEdge (dom :: Domain) = DomainConfigurationActiveEdge (KnownConf dom)
- type DomainResetKind (dom :: Domain) = DomainConfigurationResetKind (KnownConf dom)
- type DomainInitBehavior (dom :: Domain) = DomainConfigurationInitBehavior (KnownConf dom)
- type DomainResetPolarity (dom :: Domain) = DomainConfigurationResetPolarity (KnownConf dom)
- type family DomainConfigurationPeriod (config :: DomainConfiguration) :: Nat where ...
- type family DomainConfigurationActiveEdge (config :: DomainConfiguration) :: ActiveEdge where ...
- type family DomainConfigurationResetKind (config :: DomainConfiguration) :: ResetKind where ...
- type family DomainConfigurationInitBehavior (config :: DomainConfiguration) :: InitBehavior where ...
- type family DomainConfigurationResetPolarity (config :: DomainConfiguration) :: ResetPolarity where ...
- type System = "System" :: Domain
- type XilinxSystem = "XilinxSystem" :: Domain
- type IntelSystem = "IntelSystem" :: Domain
- vSystem :: VDomainConfiguration
- vIntelSystem :: VDomainConfiguration
- vXilinxSystem :: VDomainConfiguration
- data VDomainConfiguration = VDomainConfiguration {}
- vDomain :: SDomainConfiguration dom conf -> VDomainConfiguration
- createDomain :: VDomainConfiguration -> Q [Dec]
- data Clock (dom :: Domain) = Clock (SSymbol dom)
- clockTag :: Clock dom -> SSymbol dom
- hzToPeriod :: HasCallStack => Ratio Natural -> Natural
- periodToHz :: Natural -> Ratio Natural
- data Enable dom = Enable (Signal dom Bool)
- toEnable :: Signal dom Bool -> Enable dom
- fromEnable :: Enable dom -> Signal dom Bool
- enableGen :: Enable dom
- data Reset (dom :: Domain) = Reset (Signal dom Bool)
- unsafeToReset :: Signal dom Bool -> Reset dom
- unsafeFromReset :: Reset dom -> Signal dom Bool
- unsafeToHighPolarity :: forall dom. KnownDomain dom => Reset dom -> Signal dom Bool
- unsafeToLowPolarity :: forall dom. KnownDomain dom => Reset dom -> Signal dom Bool
- unsafeFromHighPolarity :: forall dom. KnownDomain dom => Signal dom Bool -> Reset dom
- unsafeFromLowPolarity :: forall dom. KnownDomain dom => Signal dom Bool -> Reset dom
- invertReset :: Reset dom -> Reset dom
- delay# :: forall dom a. (KnownDomain dom, NFDataX a) => Clock dom -> Enable dom -> a -> Signal dom a -> Signal dom a
- register# :: forall dom a. (KnownDomain dom, NFDataX a) => Clock dom -> Reset dom -> Enable dom -> a -> a -> Signal dom a -> Signal dom a
- asyncRegister# :: forall dom a. (KnownDomain dom, NFDataX a) => Clock dom -> Reset dom -> Enable dom -> a -> a -> Signal dom a -> Signal dom a
- syncRegister# :: forall dom a. (KnownDomain dom, NFDataX a) => Clock dom -> Reset dom -> Enable dom -> a -> a -> Signal dom a -> Signal dom a
- registerPowerup# :: forall dom a. (KnownDomain dom, NFDataX a, HasCallStack) => Clock dom -> a -> a
- mux :: Applicative f => f Bool -> f a -> f a -> f a
- clockGen :: KnownDomain dom => Clock dom
- resetGen :: forall dom. KnownDomain dom => Reset dom
- resetGenN :: forall dom n. (KnownDomain dom, 1 <= n) => SNat n -> Reset dom
- (.&&.) :: Applicative f => f Bool -> f Bool -> f Bool
- (.||.) :: Applicative f => f Bool -> f Bool -> f Bool
- simulate :: (NFDataX a, NFDataX b) => (Signal dom1 a -> Signal dom2 b) -> [a] -> [b]
- simulate_lazy :: (Signal dom1 a -> Signal dom2 b) -> [a] -> [b]
- signalAutomaton :: forall dom a b. (Signal dom a -> Signal dom b) -> Automaton (->) a b
- sample :: (Foldable f, NFDataX a) => f a -> [a]
- sampleN :: (Foldable f, NFDataX a) => Int -> f a -> [a]
- fromList :: NFDataX a => [a] -> Signal dom a
- sample_lazy :: Foldable f => f a -> [a]
- sampleN_lazy :: Foldable f => Int -> f a -> [a]
- fromList_lazy :: [a] -> Signal dom a
- testFor :: Foldable f => Int -> f Bool -> Property
- (.==.) :: (Eq a, Applicative f) => f a -> f a -> f Bool
- (./=.) :: (Eq a, Applicative f) => f a -> f a -> f Bool
- (.<.) :: (Ord a, Applicative f) => f a -> f a -> f Bool
- (.<=.) :: (Ord a, Applicative f) => f a -> f a -> f Bool
- (.>=.) :: (Ord a, Applicative f) => f a -> f a -> f Bool
- (.>.) :: (Ord a, Applicative f) => f a -> f a -> f Bool
- mapSignal# :: forall a b dom. (a -> b) -> Signal dom a -> Signal dom b
- signal# :: a -> Signal dom a
- appSignal# :: Signal dom (a -> b) -> Signal dom a -> Signal dom b
- foldr# :: (a -> b -> b) -> b -> Signal dom a -> b
- traverse# :: Applicative f => (a -> f b) -> Signal dom a -> f (Signal dom b)
- joinSignal# :: Signal dom (Signal dom a) -> Signal dom a
Datatypes
data Signal (dom :: Domain) a Source #
Clash has synchronous Signal
s in the form of:
Signal
(dom ::Domain
) a
Where a is the type of the value of the Signal
, for example Int or Bool,
and dom is the clock- (and reset-) domain to which the memory elements
manipulating these Signal
s belong.
The type-parameter, dom, is of the kind Domain
- a simple string. That
string refers to a single synthesis domain. A synthesis domain describes the
behavior of certain aspects of memory elements in it.
- NB: "Bad things"™ happen when you actually use a clock period of
0
, so do not do that! - NB: You should be judicious using a clock with period of
1
as you can never create a clock that goes any faster! - NB: For the best compatibility make sure your period is divisible by 2, because some VHDL simulators don't support fractions of picoseconds.
- NB: Whether
System
has good defaults depends on your target platform. Check outIntelSystem
andXilinxSystem
too!
Signals have the type role
>>>
:i Signal
type role Signal nominal representational ...
as it is safe to coerce the underlying value of a signal, but not safe to coerce a signal between different synthesis domains.
See the module documentation of Clash.Signal for more information about domains.
Instances
Domains
sameDomain :: forall (domA :: Domain) (domB :: Domain). (KnownDomain domA, KnownDomain domB) => Maybe (domA :~: domB) Source #
We either get evidence that this function was instantiated with the same domains, or Nothing.
class KnownSymbol dom => KnownDomain (dom :: Domain) where Source #
A KnownDomain
constraint indicates that a circuit's behavior depends on
some properties of a domain. See DomainConfiguration
for more information.
type KnownConf dom :: DomainConfiguration Source #
knownDomain :: SDomainConfiguration dom (KnownConf dom) Source #
Returns SDomainConfiguration
corresponding to an instance's DomainConfiguration
.
Example usage:
>>>
knownDomain @System
SDomainConfiguration (SSymbol @"System") (SNat @10000) SRising SAsynchronous SDefined SActiveHigh
Instances
KnownDomain XilinxSystem Source # | System instance with defaults set for Xilinx FPGAs |
Defined in Clash.Signal.Internal type KnownConf XilinxSystem :: DomainConfiguration Source # | |
KnownDomain IntelSystem Source # | System instance with defaults set for Intel FPGAs |
Defined in Clash.Signal.Internal type KnownConf IntelSystem :: DomainConfiguration Source # | |
KnownDomain System Source # | A clock (and reset) dom with clocks running at 100 MHz |
Defined in Clash.Signal.Internal type KnownConf System :: DomainConfiguration Source # |
type KnownConfiguration dom conf = (KnownDomain dom, KnownConf dom ~ conf) Source #
knownDomainByName :: forall dom. KnownDomain dom => SSymbol dom -> SDomainConfiguration dom (KnownConf dom) Source #
Version of knownDomain
that takes a SSymbol
. For example:
>>>
knownDomainByName (SSymbol @"System")
SDomainConfiguration (SSymbol @"System") (SNat @10000) SRising SAsynchronous SDefined SActiveHigh
data ActiveEdge Source #
Determines clock edge memory elements are sensitive to. Not yet implemented.
Rising | Elements are sensitive to the rising edge (low-to-high) of the clock. |
Falling | Elements are sensitive to the falling edge (high-to-low) of the clock. |
Instances
data SActiveEdge (edge :: ActiveEdge) where Source #
Singleton version of ActiveEdge
SRising :: SActiveEdge 'Rising | |
SFalling :: SActiveEdge 'Falling |
Instances
Show (SActiveEdge edge) Source # | |
Defined in Clash.Signal.Internal showsPrec :: Int -> SActiveEdge edge -> ShowS # show :: SActiveEdge edge -> String # showList :: [SActiveEdge edge] -> ShowS # |
data InitBehavior Source #
Unknown | Power up value of memory elements is unknown. |
Defined | If applicable, power up value of a memory element is defined. Applies to
|
Instances
data SInitBehavior (init :: InitBehavior) where Source #
Instances
Show (SInitBehavior init) Source # | |
Defined in Clash.Signal.Internal showsPrec :: Int -> SInitBehavior init -> ShowS # show :: SInitBehavior init -> String # showList :: [SInitBehavior init] -> ShowS # |
Asynchronous | Elements respond asynchronously to changes in their reset input. This means that they do not wait for the next active clock edge, but respond immediately instead. Common on Intel FPGA platforms. |
Synchronous | Elements respond synchronously to changes in their reset input. This means that changes in their reset input won't take effect until the next active clock edge. Common on Xilinx FPGA platforms. |
Instances
Eq ResetKind Source # | |
Data ResetKind Source # | |
Defined in Clash.Signal.Internal gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> ResetKind -> c ResetKind # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c ResetKind # toConstr :: ResetKind -> Constr # dataTypeOf :: ResetKind -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c ResetKind) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c ResetKind) # gmapT :: (forall b. Data b => b -> b) -> ResetKind -> ResetKind # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> ResetKind -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> ResetKind -> r # gmapQ :: (forall d. Data d => d -> u) -> ResetKind -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> ResetKind -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> ResetKind -> m ResetKind # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> ResetKind -> m ResetKind # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> ResetKind -> m ResetKind # | |
Ord ResetKind Source # | |
Defined in Clash.Signal.Internal | |
Read ResetKind Source # | |
Show ResetKind Source # | |
Generic ResetKind Source # | |
NFData ResetKind Source # | |
Defined in Clash.Signal.Internal | |
Hashable ResetKind Source # | |
Defined in Clash.Signal.Internal | |
type Rep ResetKind Source # | |
data SResetKind (resetKind :: ResetKind) where Source #
Singleton version of ResetKind
Instances
Show (SResetKind reset) Source # | |
Defined in Clash.Signal.Internal showsPrec :: Int -> SResetKind reset -> ShowS # show :: SResetKind reset -> String # showList :: [SResetKind reset] -> ShowS # |
data ResetPolarity Source #
Determines the value for which a reset line is considered "active"
ActiveHigh | Reset is considered active if underlying signal is |
ActiveLow | Reset is considered active if underlying signal is |
Instances
data SResetPolarity (polarity :: ResetPolarity) where Source #
Singleton version of ResetPolarity
Instances
Show (SResetPolarity polarity) Source # | |
Defined in Clash.Signal.Internal showsPrec :: Int -> SResetPolarity polarity -> ShowS # show :: SResetPolarity polarity -> String # showList :: [SResetPolarity polarity] -> ShowS # |
data DomainConfiguration Source #
A domain with a name (Domain
). Configures the behavior of various aspects
of a circuits. See the documentation of this record's field types for more
information on the options.
See module documentation of Clash.Explicit.Signal for more information on how to create custom synthesis domains.
DomainConfiguration | |
|
data SDomainConfiguration (dom :: Domain) (conf :: DomainConfiguration) where Source #
Singleton version of DomainConfiguration
SDomainConfiguration :: SSymbol dom -> SNat period -> SActiveEdge edge -> SResetKind reset -> SInitBehavior init -> SResetPolarity polarity -> SDomainConfiguration dom ('DomainConfiguration dom period edge reset init polarity) |
Instances
Show (SDomainConfiguration dom conf) Source # | |
Defined in Clash.Signal.Internal showsPrec :: Int -> SDomainConfiguration dom conf -> ShowS # show :: SDomainConfiguration dom conf -> String # showList :: [SDomainConfiguration dom conf] -> ShowS # |
Configuration type families
type DomainPeriod (dom :: Domain) = DomainConfigurationPeriod (KnownConf dom) Source #
Convenience type to help to extract a period from a domain. Example usage:
myFunc :: (KnownDomain dom, DomainPeriod dom ~ 6000) => ...
type DomainActiveEdge (dom :: Domain) = DomainConfigurationActiveEdge (KnownConf dom) Source #
Convenience type to help to extract the active edge from a domain. Example usage:
myFunc :: (KnownDomain dom, DomainActiveEdge dom ~ 'Rising) => ...
type DomainResetKind (dom :: Domain) = DomainConfigurationResetKind (KnownConf dom) Source #
Convenience type to help to extract the reset synchronicity from a domain. Example usage:
myFunc :: (KnownDomain dom, DomainResetKind dom ~ 'Synchronous) => ...
type DomainInitBehavior (dom :: Domain) = DomainConfigurationInitBehavior (KnownConf dom) Source #
Convenience type to help to extract the initial value behavior from a domain. Example usage:
myFunc :: (KnownDomain dom, DomainInitBehavior dom ~ 'Defined) => ...
type DomainResetPolarity (dom :: Domain) = DomainConfigurationResetPolarity (KnownConf dom) Source #
Convenience type to help to extract the reset polarity from a domain. Example usage:
myFunc :: (KnownDomain dom, DomainResetPolarity dom ~ 'ActiveHigh) => ...
type family DomainConfigurationPeriod (config :: DomainConfiguration) :: Nat where ... Source #
Helper type family for DomainPeriod
DomainConfigurationPeriod ('DomainConfiguration name period edge reset init polarity) = period |
type family DomainConfigurationActiveEdge (config :: DomainConfiguration) :: ActiveEdge where ... Source #
Helper type family for DomainActiveEdge
DomainConfigurationActiveEdge ('DomainConfiguration name period edge reset init polarity) = edge |
type family DomainConfigurationResetKind (config :: DomainConfiguration) :: ResetKind where ... Source #
Helper type family for DomainResetKind
DomainConfigurationResetKind ('DomainConfiguration name period edge reset init polarity) = reset |
type family DomainConfigurationInitBehavior (config :: DomainConfiguration) :: InitBehavior where ... Source #
Helper type family for DomainInitBehavior
DomainConfigurationInitBehavior ('DomainConfiguration name period edge reset init polarity) = init |
type family DomainConfigurationResetPolarity (config :: DomainConfiguration) :: ResetPolarity where ... Source #
Helper type family for DomainResetPolarity
DomainConfigurationResetPolarity ('DomainConfiguration name period edge reset init polarity) = polarity |
Default domains
type System = "System" :: Domain Source #
A clock (and reset) dom with clocks running at 100 MHz. Memory elements respond to the rising edge of the clock, and asynchronously to changes in reset signals. It has defined initial values, and active-high resets.
See module documentation of Clash.Explicit.Signal for more information on how to create custom synthesis domains.
type XilinxSystem = "XilinxSystem" :: Domain Source #
A clock (and reset) dom with clocks running at 100 MHz. Memory elements respond to the rising edge of the clock, and synchronously to changes in reset signals. It has defined initial values, and active-high resets.
See module documentation of Clash.Explicit.Signal for more information on how to create custom synthesis domains.
type IntelSystem = "IntelSystem" :: Domain Source #
A clock (and reset) dom with clocks running at 100 MHz. Memory elements respond to the rising edge of the clock, and asynchronously to changes in reset signals. It has defined initial values, and active-high resets.
See module documentation of Clash.Explicit.Signal for more information on how to create custom synthesis domains.
vSystem :: VDomainConfiguration Source #
Convenience value to allow easy "subclassing" of System domain. Should
be used in combination with createDomain
. For example, if you just want to
change the period but leave all other settings intact use:
createDomain vSystem{vName="System10", vPeriod=10}
vIntelSystem :: VDomainConfiguration Source #
Convenience value to allow easy "subclassing" of IntelSystem domain. Should
be used in combination with createDomain
. For example, if you just want to
change the period but leave all other settings intact use:
createDomain vIntelSystem{vName="Intel10", vPeriod=10}
vXilinxSystem :: VDomainConfiguration Source #
Convenience value to allow easy "subclassing" of XilinxSystem domain. Should
be used in combination with createDomain
. For example, if you just want to
change the period but leave all other settings intact use:
createDomain vXilinxSystem{vName="Xilinx10", vPeriod=10}
Domain utilities
data VDomainConfiguration Source #
Same as SDomainConfiguration but allows for easy updates through record update syntax.
Should be used in combination with vDomain
and createDomain
. Example:
createDomain (knownVDomain @System){vName="System10", vPeriod=10}
This duplicates the settings in the System
domain, replaces the name and
period, and creates an instance for it. As most users often want to update
the system domain, a shortcut is available in the form:
createDomain vSystem{vName="System10", vPeriod=10}
VDomainConfiguration | |
|
Instances
Eq VDomainConfiguration Source # | |
Defined in Clash.Signal.Internal (==) :: VDomainConfiguration -> VDomainConfiguration -> Bool # (/=) :: VDomainConfiguration -> VDomainConfiguration -> Bool # | |
Read VDomainConfiguration Source # | |
Defined in Clash.Signal.Internal | |
Show VDomainConfiguration Source # | |
Defined in Clash.Signal.Internal showsPrec :: Int -> VDomainConfiguration -> ShowS # show :: VDomainConfiguration -> String # showList :: [VDomainConfiguration] -> ShowS # |
vDomain :: SDomainConfiguration dom conf -> VDomainConfiguration Source #
Convert SDomainConfiguration
to VDomainConfiguration
. Should be used in combination with
createDomain
only.
createDomain :: VDomainConfiguration -> Q [Dec] Source #
Convenience method to express new domains in terms of others.
createDomain (knownVDomain @System){vName="System10", vPeriod=10}
This duplicates the settings in the System domain, replaces the name and period, and creates an instance for it. As most users often want to update the system domain, a shortcut is available in the form:
createDomain vSystem{vName="System10", vPeriod=10}
The function will create two extra identifiers. The first:
type System10 = ..
You can use that as the dom to Clocks/Resets/Enables/Signals. For example:
Signal System10 Int
. Additionally, it will create a VDomainConfiguration
that you can
use in later calls to createDomain
:
vSystem10 = knownVDomain @System10
It will also make System10
an instance of KnownDomain
.
If either identifier is already in scope it will not be generated a second time. Note: This can be useful for example when documenting a new domain:
-- | Here is some documentation for CustomDomain type CustomDomain = ("CustomDomain" :: Domain) -- | Here is some documentation for vCustomDomain createDomain vSystem{vName="CustomDomain"}
Clocks
data Clock (dom :: Domain) Source #
A clock signal belonging to a domain named dom.
Instances
hzToPeriod :: HasCallStack => Ratio Natural -> Natural Source #
Calculate the period, in ps, given a frequency in Hz
i.e. to calculate the clock period for a circuit to run at 240 MHz we get
>>>
hzToPeriod 240e6
4166
NB: This function is not synthesizable
NB: This function is lossy. I.e., periodToHz . hzToPeriod /= id.
periodToHz :: Natural -> Ratio Natural Source #
Calculate the frequence in Hz, given the period in ps
i.e. to calculate the clock frequency of a clock with a period of 5000 ps:
>>>
periodToHz 5000
200000000 % 1
NB: This function is not synthesizable
Enabling
A signal of booleans, indicating whether a component is enabled. No special meaning is implied, it's up to the component itself to decide how to respond to its enable line. It is used throughout Clash as a global enable signal.
fromEnable :: Enable dom -> Signal dom Bool Source #
Convert Enable
construct to its underlying representation: a signal of
bools.
Resets
data Reset (dom :: Domain) Source #
A reset signal belonging to a domain called dom.
The underlying representation of resets is Bool
.
unsafeToReset :: Signal dom Bool -> Reset dom Source #
unsafeToReset
is unsafe. For asynchronous resets it is unsafe
because it can introduce combinatorial loops. In case of synchronous resets
it can lead to meta-stability
issues in the presence of asynchronous resets.
NB: You probably want to use unsafeFromLowPolarity
or
unsafeFromHighPolarity
.
unsafeFromReset :: Reset dom -> Signal dom Bool Source #
unsafeFromReset
is unsafe because it can introduce:
For asynchronous resets it is unsafe because it can cause combinatorial loops. In case of synchronous resets it can lead to meta-stability in the presence of asynchronous resets.
NB: You probably want to use unsafeToLowPolarity
or
unsafeToHighPolarity
.
unsafeToHighPolarity :: forall dom. KnownDomain dom => Reset dom -> Signal dom Bool Source #
Convert a reset to an active high reset. Has no effect if reset is already an active high reset. Is unsafe because it can introduce:
For asynchronous resets it is unsafe because it can cause combinatorial loops. In case of synchronous resets it can lead to meta-stability in the presence of asynchronous resets.
unsafeToLowPolarity :: forall dom. KnownDomain dom => Reset dom -> Signal dom Bool Source #
Convert a reset to an active low reset. Has no effect if reset is already an active low reset. It is unsafe because it can introduce:
For asynchronous resets it is unsafe because it can cause combinatorial loops. In case of synchronous resets it can lead to meta-stability in the presence of asynchronous resets.
unsafeFromHighPolarity Source #
:: forall dom. KnownDomain dom | |
=> Signal dom Bool | Reset signal that's |
-> Reset dom |
Interpret a signal of bools as an active high reset and convert it to a reset signal corresponding to the domain's setting.
For asynchronous resets it is unsafe because it can cause combinatorial loops. In case of synchronous resets it can lead to meta-stability in the presence of asynchronous resets.
unsafeFromLowPolarity Source #
:: forall dom. KnownDomain dom | |
=> Signal dom Bool | Reset signal that's |
-> Reset dom |
Interpret a signal of bools as an active low reset and convert it to a reset signal corresponding to the domain's setting.
For asynchronous resets it is unsafe because it can cause combinatorial loops. In case of synchronous resets it can lead to meta-stability in the presence of asynchronous resets.
invertReset :: Reset dom -> Reset dom Source #
Invert reset signal
Basic circuits
delay# :: forall dom a. (KnownDomain dom, NFDataX a) => Clock dom -> Enable dom -> a -> Signal dom a -> Signal dom a Source #
:: forall dom a. (KnownDomain dom, NFDataX a) | |
=> Clock dom | |
-> Reset dom | |
-> Enable dom | |
-> a | Power up value |
-> a | Reset value |
-> Signal dom a | |
-> Signal dom a |
A register with a power up and reset value. Power up values are not supported on all platforms, please consult the manual of your target platform and check the notes below.
Xilinx: power up values and reset values MUST be the same. If they are not, the Xilinx tooling will ignore the reset value and use the power up value instead. Source: MIA
Intel: power up values and reset values MUST be the same. If they are not, the Intel tooling will ignore the power up value and use the reset value instead. Source: https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd01072011_91.html
:: forall dom a. (KnownDomain dom, NFDataX a) | |
=> Clock dom | Clock signal |
-> Reset dom | Reset signal |
-> Enable dom | Enable signal |
-> a | Power up value |
-> a | Reset value |
-> Signal dom a | |
-> Signal dom a |
Version of register#
that simulates a register on an asynchronous
domain. Is synthesizable.
:: forall dom a. (KnownDomain dom, NFDataX a) | |
=> Clock dom | Clock signal |
-> Reset dom | Reset signal |
-> Enable dom | Enable signal |
-> a | Power up value |
-> a | Reset value |
-> Signal dom a | |
-> Signal dom a |
Version of register#
that simulates a register on a synchronous
domain. Not synthesizable.
registerPowerup# :: forall dom a. (KnownDomain dom, NFDataX a, HasCallStack) => Clock dom -> a -> a Source #
Acts like id
if given domain allows powerup values, but returns a
value constructed with deepErrorX
otherwise.
mux :: Applicative f => f Bool -> f a -> f a -> f a Source #
Simulation and testbench functions
clockGen :: KnownDomain dom => Clock dom Source #
Clock generator for simulations. Do not use this clock generator for
the testBench function, use tbClockGen
instead.
To be used like:
clkSystem = clockGen @System
See DomainConfiguration
for more information on how to use synthesis domains.
resetGen :: forall dom. KnownDomain dom => Reset dom Source #
:: forall dom n. (KnownDomain dom, 1 <= n) | |
=> SNat n | Number of initial cycles to hold reset high |
-> Reset dom |
Generate reset that's asserted for the first n cycles.
To be used like:
rstSystem5 = resetGen System (SNat
5)
Example usage:
>>>
sampleN 7 (unsafeToHighPolarity (resetGenN @System (SNat @3)))
[True,True,True,False,False,False,False]
Boolean connectives
Simulation functions (not synthesizable)
lazy version
simulate_lazy :: (Signal dom1 a -> Signal dom2 b) -> [a] -> [b] Source #
Automaton
List <-> Signal conversion (not synthesizable)
fromList :: NFDataX a => [a] -> Signal dom a Source #
Create a Signal
from a list
Every element in the list will correspond to a value of the signal for one clock cycle.
>>>
sampleN 2 (fromList [1,2,3,4,5])
[1,2]
NB: This function is not synthesizable
lazy versions
sample_lazy :: Foldable f => f a -> [a] Source #
sampleN_lazy :: Foldable f => Int -> f a -> [a] Source #
fromList_lazy :: [a] -> Signal dom a Source #
Create a Signal
from a list
Every element in the list will correspond to a value of the signal for one clock cycle.
>>>
sampleN 2 (fromList [1,2,3,4,5] :: Signal System Int)
[1,2]
NB: This function is not synthesizable
QuickCheck combinators
Type classes
Eq
-like
Ord
-like
Functor
mapSignal# :: forall a b dom. (a -> b) -> Signal dom a -> Signal dom b Source #
Applicative
Foldable
foldr# :: (a -> b -> b) -> b -> Signal dom a -> b Source #
NB: Not synthesizable
NB: In "
":foldr#
f z s
- The function
f
should be lazy in its second argument. - The
z
element will never be used.