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Diffstat (limited to 'hsm-gpio/Hsm/GPIO/FFI.hs')
-rw-r--r-- | hsm-gpio/Hsm/GPIO/FFI.hs | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/hsm-gpio/Hsm/GPIO/FFI.hs b/hsm-gpio/Hsm/GPIO/FFI.hs deleted file mode 100644 index e0d6d07..0000000 --- a/hsm-gpio/Hsm/GPIO/FFI.hs +++ /dev/null @@ -1,95 +0,0 @@ -{-# LANGUAGE CApiFFI #-} - --- FFI bindings to `libgpiod` for direct GPIO hardware access. --- --- Exposes only the minimal required subset of `libgpiod` functionality used by --- this project. The bindings are suitable for low-level hardware control. --- --- Future work could expand this into a comprehensive `gpiod` binding package. -module Hsm.GPIO.FFI - ( chipOpen - , chipClose - , input - , output - , LineValue - , active - , inactive - , lineSettingsNew - , lineSettingsFree - , lineSettingsSetDirection - , lineSettingsSetOutputValue - , lineConfigNew - , lineConfigFree - , lineConfigAddLineSettings - , requestConfigNew - , requestConfigFree - , requestConfigSetConsumer - , LineRequest - , chipRequestLines - , lineRequestRelease - , lineRequestSetValue - , lineRequestSetValues - ) where - -import Foreign.C.String (CString) -import Foreign.C.Types (CInt(CInt), CSize(CSize), CUInt(CUInt)) -import Foreign.Ptr (Ptr) -import Foreign.Storable (Storable) - -data Chip - -foreign import ccall unsafe "gpiod.h gpiod_chip_open" chipOpen :: CString -> IO (Ptr Chip) - -foreign import ccall unsafe "gpiod.h gpiod_chip_close" chipClose :: Ptr Chip -> IO () - -data LineSettings - -newtype LineDirection = - LineDirection CInt - deriving (Show) - -foreign import capi unsafe "gpiod.h value GPIOD_LINE_DIRECTION_INPUT" input :: LineDirection - -foreign import capi unsafe "gpiod.h value GPIOD_LINE_DIRECTION_OUTPUT" output :: LineDirection - -newtype LineValue = - LineValue CInt - deriving (Show, Storable) - -foreign import capi unsafe "gpiod.h value GPIOD_LINE_VALUE_ACTIVE" active :: LineValue - -foreign import capi unsafe "gpiod.h value GPIOD_LINE_VALUE_INACTIVE" inactive :: LineValue - -foreign import ccall unsafe "gpiod.h gpiod_line_settings_new" lineSettingsNew :: IO (Ptr LineSettings) - -foreign import ccall unsafe "gpiod.h gpiod_line_settings_free" lineSettingsFree :: Ptr LineSettings -> IO () - -foreign import ccall unsafe "gpiod.h gpiod_line_settings_set_direction" lineSettingsSetDirection :: Ptr LineSettings -> LineDirection -> IO CInt - -foreign import ccall unsafe "gpiod.h gpiod_line_settings_set_output_value" lineSettingsSetOutputValue :: Ptr LineSettings -> LineValue -> IO CInt - -data LineConfig - -foreign import ccall unsafe "gpiod.h gpiod_line_config_new" lineConfigNew :: IO (Ptr LineConfig) - -foreign import ccall unsafe "gpiod.h gpiod_line_config_free" lineConfigFree :: Ptr LineConfig -> IO () - -foreign import ccall unsafe "gpiod.h gpiod_line_config_add_line_settings" lineConfigAddLineSettings :: Ptr LineConfig -> Ptr CUInt -> CSize -> Ptr LineSettings -> IO CInt - -data RequestConfig - -foreign import ccall unsafe "gpiod.h gpiod_request_config_new" requestConfigNew :: IO (Ptr RequestConfig) - -foreign import ccall unsafe "gpiod.h gpiod_request_config_free" requestConfigFree :: Ptr RequestConfig -> IO () - -foreign import ccall unsafe "gpiod.h gpiod_request_config_set_consumer" requestConfigSetConsumer :: Ptr RequestConfig -> CString -> IO () - -data LineRequest - -foreign import ccall unsafe "gpiod.h gpiod_chip_request_lines" chipRequestLines :: Ptr Chip -> Ptr RequestConfig -> Ptr LineConfig -> IO (Ptr LineRequest) - -foreign import ccall unsafe "gpiod.h gpiod_line_request_release" lineRequestRelease :: Ptr LineRequest -> IO () - -foreign import ccall unsafe "gpiod.h gpiod_line_request_set_value" lineRequestSetValue :: Ptr LineRequest -> CUInt -> LineValue -> IO CInt - -foreign import ccall unsafe "gpiod.h gpiod_line_request_set_values" lineRequestSetValues :: Ptr LineRequest -> Ptr LineValue -> IO CInt |