47 lines
1.2 KiB
Haskell
47 lines
1.2 KiB
Haskell
package ClkDivider(
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mkClkDivider,
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MkClkDivType,
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ClkDivider(..)
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) where
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interface (ClkDivider :: # -> *) hi =
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{
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reset :: Action
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;isAdvancing :: Bool
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;isHalfCycle :: Bool
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}
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type MkClkDivType maxCycles = (UInt (TLog (TAdd 1 maxCycles)))
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mkClkDivider :: Handle -> Module (ClkDivider hi)
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mkClkDivider fileHandle = do
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counter <- mkReg(0 :: MkClkDivType hi)
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let hi_value :: (MkClkDivType hi) = (fromInteger $ valueOf hi)
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let half_hi_value :: (MkClkDivType hi) = (fromInteger $ valueOf (TDiv hi 2))
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let val :: Real = (fromInteger $ valueOf hi)
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let msg = "Clock Div Period : " + (realToString val) + "\n"
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hPutStr fileHandle msg
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hPutStr fileHandle genModuleName
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addRules $
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rules
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{-# ASSERT fire when enabled #-}
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{-# ASSERT no implicit conditions #-}
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"tick" : when True ==> action
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$display (counter)
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counter := if (counter == hi_value)
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then 0
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else counter + 1
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return $
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interface ClkDivider
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reset :: Action
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reset = do
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counter := 0
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isAdvancing :: Bool
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isAdvancing = (counter == hi_value)
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isHalfCycle = (counter == half_hi_value)
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