ShiftRegisterOut< N > Class Template Reference

A class for serial-in/parallel-out shift registers, like the 74HC595. More...

#include <AH/Hardware/ExtendedInputOutput/ShiftRegisterOut.hpp>

Inheritance diagram for ShiftRegisterOut< N >:

Collaboration diagram for ShiftRegisterOut< N >:

Public Types
using	Mutex = typename std::conditional< false, DefaultMutEx, EmptyMutex >::type
using	LockGuard = typename std::conditional< false, DefaultLockGuard< Mutex >, EmptyLockGuard< Mutex > >::type

Public Member Functions
	ShiftRegisterOut (pin_t dataPin, pin_t clockPin, pin_t latchPin, BitOrder_t bitOrder=MSBFIRST)
	Create a new ShiftRegisterOut object with a shift register connected to the given pins, with a given bit order, and a given number of outputs. More...
void	begin () override
	Initialize the shift register. More...
void	updateBufferedOutputs () override
	Write the state buffer to the physical outputs. More...
void	pinMode (pin_t pin, PinMode_t mode) override __attribute__((deprecated))
	The pinMode function is not implemented because the mode is OUTPUT by definition. More...
void	pinModeBuffered (pin_t pin, PinMode_t mode) override __attribute__((deprecated))
	The pinMode function is not implemented because the mode is OUTPUT by definition. More...
void	digitalWrite (pin_t pin, PinStatus_t val) override
	Set the state of a given output pin. More...
void	digitalWriteBuffered (pin_t pin, PinStatus_t val) override
	Set the output of a given pin in the software buffer. More...
int	digitalRead (pin_t pin) override
	Get the current state of a given output pin. More...
int	digitalReadBuffered (pin_t pin) override
	Get the current state of a given output pin. More...
analog_t	analogRead (pin_t pin) override __attribute__((deprecated))
	The analogRead function is deprecated because a shift is always digital. More...
analog_t	analogReadBuffered (pin_t pin) override __attribute__((deprecated))
	The analogRead function is deprecated because a shift is always digital. More...
void	analogWrite (pin_t pin, analog_t val) override __attribute__((deprecated))
	The analogWrite function is not deprecated because a shift is always digital. More...
void	analogWriteBuffered (pin_t pin, analog_t val) override __attribute__((deprecated))
	The analogWrite function is not deprecated because a shift is always digital. More...
void	updateBufferedInputs () override
	Shift registers don't have an input buffer. More...
pin_t	red (pin_t id)
	Get the red output pin of the given LED. More...
Array< pin_t, N/3 >	redPins ()
	Get an array containing all pins with red LEDs. More...
pin_t	green (pin_t id)
	Get the green output pin of the given LED. More...
Array< pin_t, N/3 >	greenPins ()
	Get an array containing all pins with green LEDs. More...
pin_t	blue (pin_t id)
	Get the blue output pin of the given LED. More...
Array< pin_t, N/3 >	bluePins ()
	Get an array containing all pins with blue LEDs. More...
Array< pin_t, N >	pins () const
	Get an array containing all pins of the element. More...
pin_t	pin (pin_t pin) const
	Get the extended IO pin number of a given physical pin of this extended IO element. More...
pin_t	operator[] (pin_t pin) const
	Get the extended IO pin number of a given physical pin of this extended IO element. More...
pin_t	getLength () const
	Get the number of pins this IO element has. More...
pin_t	getEnd () const
	Get the largest global extended IO pin number that belongs to this extended IO element. More...
pin_t	getStart () const
	Get the smallest global extended IO pin number that belongs to this extended IO element. More...

Static Public Member Functions
static constexpr uint16_t	length ()
static void	beginAll ()
	Initialize all extended IO elements. More...
static void	updateAllBufferedOutputs ()
	Write the internal states to the physical outputs for all extended IO elements. More...
static void	updateAllBufferedInputs ()
	Read the physical state into the input buffers for all extended IO elements. More...
static DoublyLinkedList< ExtendedIOElement > &	getAll ()
	Get the list of all Extended IO elements. More...
static Mutex &	getMutex ()

Protected Attributes
const pin_t	latchPin
const BitOrder_t	bitOrder
BitArray< N >	buffer
bool	dirty = true
ExtendedIOElement *	next
ExtendedIOElement *	previous

Static Protected Attributes
static DoublyLinkedList< ExtendedIOElement >	updatables
static Mutex	mutex

Private Attributes
const pin_t	dataPin
const pin_t	clockPin
const pin_t	start
const pin_t	end

Static Private Attributes
static pin_t	offset = NUM_DIGITAL_PINS + NUM_ANALOG_INPUTS

Main initialization and updating methods
static void	applyToAll (const LockGuard &, void(Derived::*method)(Args &&...), Args &&... args)
static void	applyToAll (void(Derived::*method)(Args &&...), Args &&... args)

Enabling and disabling updatables
void	enable (const LockGuard &lock)
	Enable this updatable: insert it into the linked list of instances, so it gets updated automatically. More...
void	enable ()
	Enable this updatable: insert it into the linked list of instances, so it gets updated automatically. More...
void	disable (const LockGuard &lock)
	Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically. More...
void	disable ()
	Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically. More...
bool	isEnabled (const LockGuard &) const
	Check if this updatable is enabled. More...
bool	isEnabled ()
	Check if this updatable is enabled. More...
void	moveDown (const LockGuard &)
	Move down this element in the list. More...
void	moveDown ()
	Move down this element in the list. More...
static void	enable (UpdatableCRTP *element)
	Enable this updatable: insert it into the linked list of instances, so it gets updated automatically. More...
static void	enable (UpdatableCRTP &element)
	Enable this updatable: insert it into the linked list of instances, so it gets updated automatically. More...
static void	enable (U(&array)[N])
	Enable this updatable: insert it into the linked list of instances, so it gets updated automatically. More...
static void	disable (UpdatableCRTP *element)
	Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically. More...
static void	disable (UpdatableCRTP &element)
	Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically. More...
static void	disable (U(&array)[N])
	Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically. More...

Detailed Description

template<uint8_t N>
class AH::ShiftRegisterOut< N >

A class for serial-in/parallel-out shift registers, like the 74HC595.

Definition at line 23 of file ShiftRegisterOut.hpp.

Member Typedef Documentation

Mutex

using Mutex = typename std::conditional<false , DefaultMutEx, EmptyMutex>::type

inherited

Definition at line 36 of file Updatable.hpp.

LockGuard

using LockGuard = typename std::conditional<false , DefaultLockGuard<Mutex>, EmptyLockGuard<Mutex> >::type

inherited

Definition at line 38 of file Updatable.hpp.

Constructor & Destructor Documentation

ShiftRegisterOut()

ShiftRegisterOut	(	pin_t	dataPin,
		pin_t	clockPin,
		pin_t	latchPin,
		BitOrder_t	bitOrder = MSBFIRST
	)

Create a new ShiftRegisterOut object with a shift register connected to the given pins, with a given bit order, and a given number of outputs.

Multiple shift registers can be cascaded by connecting the serial output of the first one to the input of the second one:

clockPin >───────────┬──────────────────────┬───────── ⋯
             ┏━━━━━━━┷━━━━━━━┓      ┏━━━━━━━┷━━━━━━━┓ 
             ┃     SH_CP     ┃      ┃     SH_CP     ┃ 
dataPin  >───┨ DS        Q7S ┠──────┨ DS        Q7S ┠─ ⋯
             ┃     ST_CP     ┃      ┃     ST_CP     ┃ 
             ┗━━━━━━━┯━━━━━━━┛      ┗━━━━━━━┯━━━━━━━┛ 
latchPin >───────────┴──────────────────────┴───────── ⋯

Parameters

dataPin	The digital output pin connected to the serial data input (DS or SER) of the shift register.
clockPin	The digital output pin connected to the clock input (SH_CP or SRCLK) of the shift register.
latchPin	The digital output pin connected to the latch pin (ST_CP or RCLK) of the shift register.
bitOrder	Either MSBFIRST (most significant bit first) or LSBFIRST (least significant bit first).

Definition at line 7 of file ShiftRegisterOut.ipp.

Member Function Documentation

begin()

void begin

overridevirtual

Initialize the shift register.

Set the data and clock pins to output mode, and set all shift register outputs to LOW.

Implements ExtendedIOElement.

Definition at line 13 of file ShiftRegisterOut.ipp.

updateBufferedOutputs()

void updateBufferedOutputs

overridevirtual

Write the state buffer to the physical outputs.

Implements ExtendedIOElement.

Definition at line 21 of file ShiftRegisterOut.ipp.

pinMode()

void pinMode ( pin_t  pin, PinMode_t  mode  )

inlineoverridevirtualinherited

The pinMode function is not implemented because the mode is OUTPUT by definition.

Reimplemented from ExtendedIOElement.

Definition at line 46 of file ShiftRegisterOutBase.hpp.

pinModeBuffered()

void pinModeBuffered ( pin_t  pin, PinMode_t  mode  )

inlineoverridevirtualinherited

The pinMode function is not implemented because the mode is OUTPUT by definition.

Implements ExtendedIOElement.

Definition at line 55 of file ShiftRegisterOutBase.hpp.

digitalWrite()

void digitalWrite ( pin_t  pin, PinStatus_t  val  )

overridevirtualinherited

Set the state of a given output pin.

Parameters

pin	The shift register pin to set.
val	The value to set the pin to. (Either HIGH (1) or LOW (0))

Reimplemented from ExtendedIOElement.

Definition at line 13 of file ShiftRegisterOutBase.ipp.

digitalWriteBuffered()

void digitalWriteBuffered ( pin_t  pin, PinStatus_t  val  )

overridevirtualinherited

Set the output of a given pin in the software buffer.

The buffer is written to the ExtIO device when updateBufferedOutputs is called.

Parameters

pin	The shift register pin to set.
val	The value to set the pin to. (Either HIGH (1) or LOW (0))

Implements ExtendedIOElement.

Definition at line 20 of file ShiftRegisterOutBase.ipp.

digitalRead()

int digitalRead ( pin_t  pin )

overridevirtualinherited

Get the current state of a given output pin.

Parameters

pin	The shift register pin to read from.

Return values

0	The state of the pin is LOW.
1	The state of the pin is HIGH.

Reimplemented from ExtendedIOElement.

Definition at line 26 of file ShiftRegisterOutBase.ipp.

digitalReadBuffered()

int digitalReadBuffered ( pin_t  pin )

inlineoverridevirtualinherited

Get the current state of a given output pin.

Parameters

pin	The shift register pin to read from.

Return values

0	The state of the pin is LOW.
1	The state of the pin is HIGH.

Implements ExtendedIOElement.

Definition at line 95 of file ShiftRegisterOutBase.hpp.

analogRead()

analog_t analogRead ( pin_t  pin )

inlineoverridevirtualinherited

The analogRead function is deprecated because a shift is always digital.

Parameters

pin	The shift register pin to read from.

Return values

0	The state of the pin is LOW.
1023	The state of the pin is HIGH.

Reimplemented from ExtendedIOElement.

Definition at line 109 of file ShiftRegisterOutBase.hpp.

analogReadBuffered()

analog_t analogReadBuffered ( pin_t  pin )

inlineoverridevirtualinherited

The analogRead function is deprecated because a shift is always digital.

Parameters

pin	The shift register pin to read from.

Return values

0	The state of the pin is LOW.
1023	The state of the pin is HIGH.

Implements ExtendedIOElement.

Definition at line 116 of file ShiftRegisterOutBase.hpp.

analogWrite()

void analogWrite ( pin_t  pin, analog_t  val  )

inlineoverridevirtualinherited

The analogWrite function is not deprecated because a shift is always digital.

Parameters

pin	The shift register pin to set.
val	The value to set the pin to. A value greater or equal to 0x80 will set the pin to a HIGH state, a value less than 0x80 will set the pin to a LOW state.

Reimplemented from ExtendedIOElement.

Definition at line 131 of file ShiftRegisterOutBase.hpp.

analogWriteBuffered()

void analogWriteBuffered ( pin_t  pin, analog_t  val  )

inlineoverridevirtualinherited

The analogWrite function is not deprecated because a shift is always digital.

Parameters

pin	The shift register pin to set.
val	The value to set the pin to. A value greater or equal to 0x80 will set the pin to a HIGH state, a value less than 0x80 will set the pin to a LOW state.

Implements ExtendedIOElement.

Definition at line 139 of file ShiftRegisterOutBase.hpp.

updateBufferedInputs()

void updateBufferedInputs ( )

inlineoverridevirtualinherited

Shift registers don't have an input buffer.

Implements ExtendedIOElement.

Definition at line 147 of file ShiftRegisterOutBase.hpp.

red()

pin_t red ( pin_t  id )

inherited

Get the red output pin of the given LED.

Parameters

id	The zero-based LED number.

Definition at line 42 of file ShiftRegisterOutBase.ipp.

redPins()

Array< pin_t, N/3 > redPins

inherited

Get an array containing all pins with red LEDs.

Definition at line 47 of file ShiftRegisterOutBase.ipp.

green()

pin_t green ( pin_t  id )

inherited

Get the green output pin of the given LED.

Parameters

id	The zero-based LED number.

Definition at line 31 of file ShiftRegisterOutBase.ipp.

greenPins()

Array< pin_t, N/3 > greenPins

inherited

Get an array containing all pins with green LEDs.

Definition at line 36 of file ShiftRegisterOutBase.ipp.

blue()

pin_t blue ( pin_t  id )

inherited

Get the blue output pin of the given LED.

Parameters

id	The zero-based LED number.

Definition at line 53 of file ShiftRegisterOutBase.ipp.

bluePins()

Array< pin_t, N/3 > bluePins

inherited

Get an array containing all pins with blue LEDs.

Definition at line 58 of file ShiftRegisterOutBase.ipp.

pins()

Array<pin_t, N> pins ( ) const

inlineinherited

Get an array containing all pins of the element.

Definition at line 27 of file StaticSizeExtendedIOElement.hpp.

length()

static constexpr uint16_t length ( )

inlinestaticconstexprinherited

Definition at line 31 of file StaticSizeExtendedIOElement.hpp.

beginAll()

void beginAll ( )

staticinherited

Initialize all extended IO elements.

Definition at line 20 of file ExtendedIOElement.cpp.

updateAllBufferedOutputs()

void updateAllBufferedOutputs ( )

staticinherited

Write the internal states to the physical outputs for all extended IO elements.

Definition at line 24 of file ExtendedIOElement.cpp.

updateAllBufferedInputs()

void updateAllBufferedInputs ( )

staticinherited

Read the physical state into the input buffers for all extended IO elements.

Definition at line 28 of file ExtendedIOElement.cpp.

pin()

pin_t pin ( pin_t  pin ) const

inherited

Get the extended IO pin number of a given physical pin of this extended IO element.

Parameters

pin	The zero-based physical pin number of this IO element.

Returns

The global, unique extended IO pin number for the given pin.

Definition at line 32 of file ExtendedIOElement.cpp.

operator[]()

pin_t operator[] ( pin_t  pin ) const

inherited

Get the extended IO pin number of a given physical pin of this extended IO element.

It is alias for ExtendedIOElement::pin.

Parameters

pin	The zero-based physical pin number of this IO element.

Returns

The global, unique extended IO pin number for the given pin.

Definition at line 47 of file ExtendedIOElement.cpp.

getLength()

pin_t getLength ( ) const

inherited

Get the number of pins this IO element has.

Returns

The number of pins this IO element has.

Definition at line 49 of file ExtendedIOElement.cpp.

getEnd()

pin_t getEnd ( ) const

inherited

Get the largest global extended IO pin number that belongs to this extended IO element.

Definition at line 51 of file ExtendedIOElement.cpp.

getStart()

pin_t getStart ( ) const

inherited

Get the smallest global extended IO pin number that belongs to this extended IO element.

Definition at line 53 of file ExtendedIOElement.cpp.

getAll()

DoublyLinkedList< ExtendedIOElement > & getAll ( )

staticinherited

Get the list of all Extended IO elements.

Definition at line 55 of file ExtendedIOElement.cpp.

getMutex()

static Mutex& getMutex ( )

inlinestaticinherited

Definition at line 79 of file Updatable.hpp.

applyToAll() [1/2]

static void applyToAll ( const LockGuard &  , void(Derived::*)(Args &&...)  method, Args &&...  args  )

inlinestaticinherited

Definition at line 85 of file Updatable.hpp.

applyToAll() [2/2]

static void applyToAll ( void(Derived::*)(Args &&...)  method, Args &&...  args  )

inlinestaticinherited

Definition at line 93 of file Updatable.hpp.

enable() [1/5]

void enable ( const LockGuard &  lock )

inlineinherited

Enable this updatable: insert it into the linked list of instances, so it gets updated automatically.

Definition at line 106 of file Updatable.hpp.

enable() [2/5]

void enable ( )

inlineinherited

Enable this updatable: insert it into the linked list of instances, so it gets updated automatically.

Definition at line 115 of file Updatable.hpp.

enable() [3/5]

static void enable ( UpdatableCRTP< ExtendedIOElement > *  element )

inlinestaticinherited

Enable this updatable: insert it into the linked list of instances, so it gets updated automatically.

Definition at line 144 of file Updatable.hpp.

enable() [4/5]

static void enable ( UpdatableCRTP< ExtendedIOElement > &  element )

inlinestaticinherited

Enable this updatable: insert it into the linked list of instances, so it gets updated automatically.

Definition at line 146 of file Updatable.hpp.

enable() [5/5]

static void enable ( U(&)  array[N] )

inlinestaticinherited

Enable this updatable: insert it into the linked list of instances, so it gets updated automatically.

Definition at line 149 of file Updatable.hpp.

disable() [1/5]

void disable ( const LockGuard &  lock )

inlineinherited

Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically.

Definition at line 119 of file Updatable.hpp.

disable() [2/5]

void disable ( )

inlineinherited

Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically.

Definition at line 128 of file Updatable.hpp.

disable() [3/5]

static void disable ( UpdatableCRTP< ExtendedIOElement > *  element )

inlinestaticinherited

Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically.

Definition at line 155 of file Updatable.hpp.

disable() [4/5]

static void disable ( UpdatableCRTP< ExtendedIOElement > &  element )

inlinestaticinherited

Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically.

Definition at line 157 of file Updatable.hpp.

disable() [5/5]

static void disable ( U(&)  array[N] )

inlinestaticinherited

Disable this updatable: remove it from the linked list of instances, so it no longer gets updated automatically.

Definition at line 160 of file Updatable.hpp.

isEnabled() [1/2]

bool isEnabled ( const LockGuard &  ) const

inlineinherited

Check if this updatable is enabled.

Note

Assumes that the updatable is not added to a different linked list by the user.

Definition at line 136 of file Updatable.hpp.

isEnabled() [2/2]

bool isEnabled ( )

inlineinherited

Check if this updatable is enabled.

Note

Assumes that the updatable is not added to a different linked list by the user.

Definition at line 141 of file Updatable.hpp.

moveDown() [1/2]

void moveDown ( const LockGuard &  )

inlineinherited

Move down this element in the list.

Definition at line 166 of file Updatable.hpp.

moveDown() [2/2]

void moveDown ( )

inlineinherited

Move down this element in the list.

Definition at line 168 of file Updatable.hpp.

Member Data Documentation

dataPin

const pin_t dataPin

private

Definition at line 71 of file ShiftRegisterOut.hpp.

clockPin

const pin_t clockPin

private

Definition at line 72 of file ShiftRegisterOut.hpp.

latchPin

const pin_t latchPin

protectedinherited

Definition at line 189 of file ShiftRegisterOutBase.hpp.

bitOrder

const BitOrder_t bitOrder

protectedinherited

Definition at line 190 of file ShiftRegisterOutBase.hpp.

buffer

BitArray<N> buffer

protectedinherited

Definition at line 192 of file ShiftRegisterOutBase.hpp.

dirty

bool dirty = true

protectedinherited

Definition at line 193 of file ShiftRegisterOutBase.hpp.

start

const pin_t start

privateinherited

Definition at line 260 of file ExtendedIOElement.hpp.

end

const pin_t end

privateinherited

Definition at line 261 of file ExtendedIOElement.hpp.

offset

pin_t offset = NUM_DIGITAL_PINS + NUM_ANALOG_INPUTS

staticprivateinherited

Definition at line 262 of file ExtendedIOElement.hpp.

updatables

DoublyLinkedList< ExtendedIOElement > updatables

staticprotectedinherited

Definition at line 173 of file Updatable.hpp.

mutex

UpdatableCRTP< ExtendedIOElement , false >::Mutex mutex

staticprotectedinherited

Definition at line 174 of file Updatable.hpp.

next

ExtendedIOElement * next

protectedinherited

Definition at line 323 of file LinkedList.hpp.

previous

ExtendedIOElement * previous

protectedinherited

Definition at line 324 of file LinkedList.hpp.

---

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

• ShiftRegisterOut.hpp
• ShiftRegisterOut.ipp