Soft::SRPO< N > Class Template Reference

#include <SRPO.hh>

Collaboration diagram for Soft::SRPO< N >:

Classes
class	OutputPin

Public Member Functions
	SRPO (Board::DigitalPin sda=Board::D3, Board::DigitalPin scl=Board::D4)
bool	is_set (uint8_t pin)
void	is_clear (uint8_t pin)
void	set (uint8_t pin)
void	clear (uint8_t pin)
void	toggle (uint8_t pin)
void	set ()
void	clear ()
void	update ()

Static Public Attributes
static const uint8_t	PINS = N * CHARBITS

Protected Attributes
uint8_t	m_port [N]
::OutputPin	m_sda
::OutputPin	m_scl

Detailed Description

template<uint8_t N>
class Soft::SRPO< N >

Soft N-Shift Register Parallel Output, 2-pin. The shift registers (74HC164/74HC595) may be cascaded for N*8-bit parallel output port (see circuit below). The pins are numbered from the first connect shift register (Q0..Q7) and updwards in the chain (Q8..Q15) and so on.

Circuit

                        74HC164    (VCC)
                      +----U----+    |
(D3/SDA)----------+-1-|DSA   VCC|-14-+
                  +-2-|DSB    Q7|-13------------(Q7)--+
(Q0)----------------3-|Q0     Q6|-12------------(Q6)  |
(Q1)----------------4-|Q1     Q5|-11------------(Q5)  |
(Q2)----------------5-|Q2     Q4|-10------------(Q4)  |
(Q3)----------------6-|Q3    /MR|--9-----------(VCC)  |
                  +-7-|GND    CP|--8--------(SCL/D4)--)-+
                  |   +---------+                     | |
                  |      0.1uF                        | |
                (GND)-----||-------(VCC)              | |
                                                      | |
                  +-----------------------------------+ |
                  |                                     |
                  |     74HC164    (VCC)                |
                  |   +----U----+    |                  |
                  +-1-|DSA   VCC|-14-+                  |
                  +-2-|DSB    Q7|-13-----------(Q15)--+ |
(Q8)----------------3-|Q0     Q6|-12-----------(Q14)  | |
(Q9)----------------4-|Q1     Q5|-11-----------(Q13)  | |
(Q10)---------------5-|Q2     Q4|-10-----------(Q12)  | |
(Q11)---------------6-|Q3    /MR|--9-----------(VCC)  | |
                  +-7-|GND    CP|--8------------------)-+
                  |   +---------+                     | |
                  |      0.1uF                        | |
                (GND)-----||-------(VCC)              v v

Parameters

[in]

N

number of shift registers (N * 8 output pins).

Definition at line 69 of file SRPO.hh.

Constructor & Destructor Documentation

template<uint8_t N>

Soft::SRPO< N >::SRPO ( Board::DigitalPin  sda = Board::D3, Board::DigitalPin  scl = Board::D4  )

inline

Construct N-shift register connected to given pins.

Parameters

[in]	sda	serial output data (Default D3).
[in]	scl	serial clock (Default D4).

Definition at line 79 of file SRPO.hh.

Member Function Documentation

template<uint8_t N>

void Soft::SRPO< N >::clear ( uint8_t  pin )

inline

Clear given pin in shadow register. Call update() to write to shift register.

Parameters

[in]

pin

pin number.

Definition at line 131 of file SRPO.hh.

template<uint8_t N>

void Soft::SRPO< N >::clear ( )

inline

Clear the shadow registers. Call update() to write to shift register.

Definition at line 166 of file SRPO.hh.

template<uint8_t N>

void Soft::SRPO< N >::is_clear ( uint8_t  pin )

inline

Return true(1) if the given pin in shadow register is set, otherwise false(0).

Parameters

[in]

pin

pin number.

Returns

bool.

Definition at line 107 of file SRPO.hh.

template<uint8_t N>

bool Soft::SRPO< N >::is_set ( uint8_t  pin )

inline

Return true(1) if the given pin in shadow register is set, otherwise false(0).

Parameters

[in]

pin

pin number.

Returns

bool.

Definition at line 94 of file SRPO.hh.

template<uint8_t N>

void Soft::SRPO< N >::set ( uint8_t  pin )

inline

Set given pin in shadow register. Call update() to write to shift register.

Parameters

[in]

pin

pin number.

Definition at line 119 of file SRPO.hh.

template<uint8_t N>

void Soft::SRPO< N >::set ( )

inline

Set the shadow registers. Call update() to write to shift register.

Definition at line 156 of file SRPO.hh.

template<uint8_t N>

void Soft::SRPO< N >::toggle ( uint8_t  pin )

inline

Toggle given pin in shadow register. Call update() to write to shift register.

Parameters

[in]

pin

pin number.

Definition at line 143 of file SRPO.hh.

template<uint8_t N>

void Soft::SRPO< N >::update ( )

inline

Update shift register with value of shadow registers.

Definition at line 175 of file SRPO.hh.

Member Data Documentation

template<uint8_t N>

uint8_t Soft::SRPO< N >::m_port[N]

protected

Shadow port register.

Definition at line 229 of file SRPO.hh.

template<uint8_t N>

::OutputPin Soft::SRPO< N >::m_scl

protected

Serial clock output pin

Definition at line 235 of file SRPO.hh.

template<uint8_t N>

::OutputPin Soft::SRPO< N >::m_sda

protected

Serial data output pin

Definition at line 232 of file SRPO.hh.

template<uint8_t N>

const uint8_t Soft::SRPO< N >::PINS = N * CHARBITS

static

Number of pins for N ports

Definition at line 72 of file SRPO.hh.

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

• cores/cosa/Cosa/Soft/SRPO.hh