STM32.DMA

The direct memory access (DMA) controller is one of the coolest features of STM32Fxxx micro controllers. For example, one can sample signals at a fast and precise sampling rate or generate wave-form patterns using DMA transfers. DMA transfers run completely independent and in parallel from the CPU or the Haskell code.

Documentation

data Channel

Constructors

DMA1_Channel1

DMA1_Channel2

DMA1_Channel3

DMA1_Channel4

DMA1_Channel5

DMA1_Channel6

DMA1_Channel7

DMA2_Channel1

DMA2_Channel2

DMA2_Channel3

DMA2_Channel4

DMA2_Channel5

Instances

Show Channel

Methods

showsPrec :: Int -> Channel -> ShowS

show :: Channel -> String

showList :: [Channel] -> ShowS

channelToPeripheral :: Channel -> Peripheral

channelToCCR :: Channel -> Register

channelToCNDTR :: Channel -> Register

channelToCPAR :: Channel -> Register

channelToCMAR :: Channel -> Register

data Config

Constructors

Config

Fields

• _BufferSize :: Word16
• _Direction :: Direction
• _MemoryBaseAddr :: Word32
• _MemoryDataSize :: DataSize
• _MemoryInc :: Bool
• _Mode :: Mode
• _PeripheralBaseAddr :: Word32
• _PeripheralDataSize :: DataSize
• _PeripheralInc :: Bool
• _Priority :: Priority

Instances

Show Config

Methods

showsPrec :: Int -> Config -> ShowS

show :: Config -> String

showList :: [Config] -> ShowS

data Direction

Constructors

PeripheralDST

PeripheralSRC

Mem2Mem

Instances

Show Direction

Methods

showsPrec :: Int -> Direction -> ShowS

show :: Direction -> String

showList :: [Direction] -> ShowS

data Priority

Constructors

VeryHigh

High

Medium

Low

Instances

Show Priority

Methods

showsPrec :: Int -> Priority -> ShowS

show :: Priority -> String

showList :: [Priority] -> ShowS

data DataSize

Constructors

Byte

HalfWord

Word

Instances

Show DataSize

Methods

showsPrec :: Int -> DataSize -> ShowS

show :: DataSize -> String

showList :: [DataSize] -> ShowS

data Mode

Constructors

Circular

Normal

Instances

Show Mode

Methods

showsPrec :: Int -> Mode -> ShowS

show :: Mode -> String

showList :: [Mode] -> ShowS

ToBit Mode

Methods

toBit :: Mode -> Bool

writeCCRxOffset :: ToBit b => Int -> Channel -> Field -> b -> MI ()

init :: Channel -> Config -> MI ()

cmd :: Channel -> Bool -> MI ()

enable :: Channel -> MI ()

disable :: Channel -> MI ()

deInit :: Channel -> MI ()