ShiftRegistersInput Class Reference

State of switches connected to PISO shift registers. More...

#include <InputHardware.hpp>

Public Member Functions
	ShiftRegistersInput (OutputGPIO loadPin, OutputGPIO nextPin, InputGPIO inputPin, const ShiftRegisterChain &chain, InputNumber SER_inputNumber=UNSPECIFIED::VALUE, const bool loadHighOrLow=false, const bool nextHighToLowOrLowToHigh=false, const bool negativeLogic=true)
	Construct a new Shift Registers Input object.
virtual uint64_t	read (uint64_t lastState) override
	Read the current state of the inputs (pressed or released)
Public Member Functions inherited from DigitalInput

Additional Inherited Members
Public Attributes inherited from DigitalInput
uint64_t	mask = ~0ULL
	Input mask. For read-only.
Protected Member Functions inherited from DigitalInput
void	addToMask (uint64_t bitmap)
	Add an input bitmap to the current mask.

Detailed Description

State of switches connected to PISO shift registers.

Definition at line 399 of file InputHardware.hpp.

Constructor & Destructor Documentation

ShiftRegistersInput()

ShiftRegistersInput::ShiftRegistersInput	(	OutputGPIO	loadPin,
		OutputGPIO	nextPin,
		InputGPIO	inputPin,
		const ShiftRegisterChain &	chain,
		InputNumber	SER_inputNumber = UNSPECIFIED::VALUE,
		const bool	loadHighOrLow = false,
		const bool	nextHighToLowOrLowToHigh = false,
		const bool	negativeLogic = true )

Construct a new Shift Registers Input object.

Parameters

loadPin	GPIO number of the load pin
nextPin	GPIO number of the next/clock pin
inputPin	GPIO number of the serial output pin
chain	Chain of PISO shift registers
SER_inputNumber	Input number assigned to the SER pin in the last chip of the chain.
loadHighOrLow	If true, parallel inputs are loaded when loadPinis HIGH. If false, parallel inputs are loaded when loadPinis LOW.
nextHighToLowOrLowToHigh	If true, next bit is selected when an high-to-low pulse is detected at nextPin. If false, next bit is selected when a low-to-high pulse is detected.
negativeLogic	If true, all switches must be pulled down (the default), If false, all switches must be pulled up (positive logic).

Member Function Documentation

read()

virtual uint64_t ShiftRegistersInput::read ( uint64_t lastState )

overridevirtual

Read the current state of the inputs (pressed or released)

Warning

This function must not set any bit outside of the input bitmask in the return value.

Parameters

lastState

State of the same inputs as recorded in the previous iteration. Whether the current state is unknown, lastState must be returned (properly masked). Must be set to zero at first call.

Returns

uint64_t Current state of the inputs (a bit set to 1 means a pressed button).

Implements DigitalInput.

---

The documentation for this class was generated from the following file:

• /github/workspace/src/include/InputHardware.hpp