An abstraction for using gpiohandle_request object(s). More...

Inheritance diagram for duds::hardware::interface::linux::GpioRequest:

Public Member Functions
virtual	~GpioRequest ()

virtual void	inputOffset (int chipFd, std::uint32_t offset)=0
	Configures the pin at the given offset as an input. More...

virtual bool	inputState (int chipFd, std::uint32_t offset)=0
	Reads the input state of the indicated pin. More...

virtual void	outputOffset (int chipFd, std::uint32_t offset, bool state)=0
	Configures the pin at the given offset as an output. More...

virtual void	outputState (std::uint32_t offset, bool state)=0
	Sets the output state of a single pin in advance of making the output request to the port. More...

virtual void	read (int chipFd, gpiohandle_data &result, std::uint32_t *&offsets, int &length)=0
	Read from all input pins. More...

virtual void	write (int chipFd)=0
	Configures pins as outputs and sets their output states. More...

virtual void	write (int chipFd, std::uint32_t offset, bool state)=0
	Sets the output state of a single output pin. More...

Detailed Description

An abstraction for using gpiohandle_request object(s).

Author: Jeff Jackowski

Definition at line 180 of file GpioDevPort.cpp.

Constructor & Destructor Documentation

◆ ~GpioRequest()

virtual duds::hardware::interface::linux::GpioRequest::~GpioRequest ( )

inlinevirtual

Definition at line 182 of file GpioDevPort.cpp.

Member Function Documentation

◆ inputOffset()

virtual void duds::hardware::interface::linux::GpioRequest::inputOffset	(	int	chipFd,
		std::uint32_t	offset
	)

pure virtual

Configures the pin at the given offset as an input.

Parameters

chipFd	The file descriptor for the GPIO device.
offset	The pin offset.

Implemented in duds::hardware::interface::linux::IoGpioRequest, and duds::hardware::interface::linux::SingleGpioRequest.

Referenced by duds::hardware::interface::linux::GpioDevPort::configurePort(), and ~GpioRequest().

◆ inputState()

virtual bool duds::hardware::interface::linux::GpioRequest::inputState	(	int	chipFd,
		std::uint32_t	offset
	)

pure virtual

Reads the input state of the indicated pin.

Configures the pin as an input if not already an input.

Parameters

chipFd	The file descriptor for the GPIO device.
offset	The pin offset.

Implemented in duds::hardware::interface::linux::IoGpioRequest, and duds::hardware::interface::linux::SingleGpioRequest.

Referenced by duds::hardware::interface::linux::GpioDevPort::inputImpl(), and ~GpioRequest().

◆ outputOffset()

virtual void duds::hardware::interface::linux::GpioRequest::outputOffset	(	int	chipFd,
		std::uint32_t	offset,
		bool	state
	)

pure virtual

Configures the pin at the given offset as an output.

Parameters

chipFd	The file descriptor for the GPIO device.
offset	The pin offset.
state	The output state for the pin.

Implemented in duds::hardware::interface::linux::IoGpioRequest, and duds::hardware::interface::linux::SingleGpioRequest.

Referenced by duds::hardware::interface::linux::GpioDevPort::configurePort(), and ~GpioRequest().

◆ outputState()

virtual void duds::hardware::interface::linux::GpioRequest::outputState	(	std::uint32_t	offset,
		bool	state
	)

pure virtual

Sets the output state of a single pin in advance of making the output request to the port.

Use write(int) to output the data.

Parameters

offset	The pin offset.
state	The output state to store for the pin.

Implemented in duds::hardware::interface::linux::IoGpioRequest, and duds::hardware::interface::linux::SingleGpioRequest.

Referenced by duds::hardware::interface::linux::GpioDevPort::outputImpl(), and ~GpioRequest().

◆ read()

virtual void duds::hardware::interface::linux::GpioRequest::read	(	int	chipFd,
		gpiohandle_data &	result,
		std::uint32_t *&	offsets,
		int &	length
	)

pure virtual

Read from all input pins.

Parameters

chipFd	The file descriptor for the GPIO device.
result	The input states.
offsets	A pointer to the start of an array with the line offset values for identifying where the input source.
length	The number of line offsets.

Implemented in duds::hardware::interface::linux::IoGpioRequest, and duds::hardware::interface::linux::SingleGpioRequest.

Referenced by duds::hardware::interface::linux::GpioDevPort::inputImpl(), and ~GpioRequest().