System.Hardware.PiLcd.I2c

You can use this module to communicate with I2C peripherals on Linux.

Documentation

type I2cHandle = Fd

Represents an I²C bus.

data Segment

Represents an I²C read or write, as part of a larger transaction.

Constructors

Read Int

number of bytes to read

Write [Word8]

bytes to write

i2cOpen

Arguments

:: Int

bus number

-> IO I2cHandle

Open a handle to an I²C bus.

i2cTransaction

Arguments

:: I2cHandle

handle to an I²C bus

-> Int

address of device on I²C bus

-> [Segment]

list of read/write segments to perform

-> IO [[Word8]]

list of bytes returned for each read segment

Performs an I2C_RDWR transaction.

i2cReadReg

Arguments

:: I2cHandle

handle to an I²C bus

-> Int

address of device on the I²C bus

-> Word8

register number

-> Int

number of bytes to read

-> IO [Word8]

Writes the register number, and then reads the specified number of bytes.

i2cWriteReg

Arguments

:: I2cHandle

handle to an I²C bus

-> Int

address of device on the I²C bus

-> Word8

register number

-> [Word8]

bytes to write

-> IO ()

Writes the register number, and then writes the specified bytes.

i2cClose :: I2cHandle -> IO ()

Close a handle to an I²C bus.