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-rw-r--r--hsm-gpio/Hsm/GPIO/Lib.hsc116
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diff --git a/hsm-gpio/Hsm/GPIO/Lib.hsc b/hsm-gpio/Hsm/GPIO/Lib.hsc
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--- a/hsm-gpio/Hsm/GPIO/Lib.hsc
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-{-# LANGUAGE CPP #-}
-{-# LANGUAGE ForeignFunctionInterface #-}
-
--- This module provides C bindings to the `gpiod` library for direct GPIO pin
--- control. It includes bindings only for the C functions that are currently
--- used. In the future, creating a complete set of bindings for the entire
--- `gpiod` library as an external package would be a valuable contribution to
--- Hackage.
-
-module Hsm.GPIO.Lib
- ( chipOpen
- , chipClose
- , input
- , output
- , LineValue
- , active
- , inactive
- , lineSettingsNew
- , lineSettingsFree
- , lineSettingsSetDirection
- , lineSettingsSetOutputValue
- , lineConfigNew
- , lineConfigFree
- , lineConfigAddLineSettings
- , requestConfigNew
- , requestConfigFree
- , requestConfigSetConsumer
- , requestLines
- , LineRequest
- , lineRequestRelease
- , lineRequestSetValue
- , lineRequestSetValues
- ) where
-
-#include <gpiod.h>
-
-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)
-
-#{enum LineDirection, LineDirection
- , input = GPIOD_LINE_DIRECTION_INPUT
- , output = GPIOD_LINE_DIRECTION_OUTPUT
-}
-
-newtype LineValue =
- LineValue CInt
- deriving (Show, Storable)
-
-#{enum LineValue, LineValue
- , active = GPIOD_LINE_VALUE_ACTIVE
- , inactive = GPIOD_LINE_VALUE_INACTIVE
-}
-
-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.d 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"
- requestLines :: 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