ShiftRegister595 Class Reference

Device Driver for 8-bit shift register.
CD74HC595 - 8-bit serial to parallel output shift. More...

Detailed Description

Device Driver for 8-bit shift register.
CD74HC595 - 8-bit serial to parallel output shift.

Author

shensley

Date

May 2020

#include <sr_595.h>

Public Types
enum	Pins { PIN_LATCH , PIN_CLK , PIN_DATA , NUM_PINS }

Public Member Functions
	ShiftRegister595 ()
	~ShiftRegister595 ()
void	Init (dsy_gpio_pin *pin_cfg, size_t num_daisy_chained=1)
void	Set (uint8_t idx, bool state)
void	Write ()

Member Enumeration Documentation

Pins

enum ShiftRegister595::Pins

The following pins correspond to the hardware connections to the 595.

Enumerator
PIN_LATCH
PIN_CLK	LATCH corresonds to Pin 12 "RCLK"
PIN_DATA	CLK corresponds to Pin 11 "SRCLK"
NUM_PINS	DATA corresponds to Pin 14 "SER"

Constructor & Destructor Documentation

ShiftRegister595()

ShiftRegister595::ShiftRegister595 ( )

inline

~ShiftRegister595()

ShiftRegister595::~ShiftRegister595 ( )

inline

Member Function Documentation

Init()

void ShiftRegister595::Init	(	dsy_gpio_pin *	pin_cfg,
		size_t	num_daisy_chained = 1
	)

Initializes the GPIO, and data for the ShiftRegister

Parameters

pin_cfg	is an array of dsy_gpio_pin corresponding the the Pins enum above.
num_daisy_chained	(default = 1) is the number of 595 devices daisy chained together.

Set()

void ShiftRegister595::Set	(	uint8_t	idx,
		bool	state
	)

Sets the state of the specified output.

Parameters

idx	The index starts with QA on the first device and ends with QH on the last device.
state	A true state will set the output HIGH, while a false state will set the output LOW.

Write()

void ShiftRegister595::Write

(

)

Writes the states of shift register out to the connected devices.

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

• src/dev/sr_595.h