InetrfaceProducts NXP / PCAL955x

The PCAL9555, PCAL9554 series is a low-voltage 16-bit/8-bit General Purpose Input/Output (GPIO) expander with interrupt. This conponent library is compatible to basic operation os GPIO expanders: PCAL9555, PCA9555, PCA9535, PCA9539, PCAL9554, PCA9554 and PCA9538. On addition to this, this library is including mbed-SDK-style APIs. APIs that similar to DigitaiInOut, DigitalOut, DigitalIn, BusInOUt, BusOut and BusIn are available.

Dependents:   PCAL9555_Hello OM13082-JoyStick OM13082_LED OM13082-test ... more

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GpioDigitalInOut Class Reference
Public Types | Public Member Functions

GpioDigitalInOut Class Reference

GpioDigitalInOut class. More...

#include <GpioDigitalInOut.h>

Inherited by GpioDigitalIn, and GpioDigitalOut.

Public Types

enum  GpioPinName {
  X0_0, X0_1, X0_2, X0_3,
  X0_4, X0_5, X0_6, X0_7,
  X1_0, X1_1, X1_2, X1_3,
  X1_4, X1_5, X1_6, X1_7,
  X0 = X0_0, X1 = X0_1, X2 = X0_2, X3 = X0_3,
  X4 = X0_4, X5 = X0_5, X6 = X0_6, X7 = X0_7,
  X8 = X1_0, X9 = X1_1, X10 = X1_2, X11 = X1_3,
  X12 = X1_4, X13 = X1_5, X14 = X1_6, X15 = X1_7,
  X_NC = ~0x0L
}
 

GPIO-Expander pin names.

More...

Public Member Functions

 GpioDigitalInOut (CompGpioExp &gpiop, GpioPinName pin_name)
 Create a GpioDigitalInOut connected to the specified pin.
virtual ~GpioDigitalInOut ()
 Destractor.
virtual void write (int v)
 Set the output, specified as 0 or 1 (int)
virtual int read (void)
 Return the output setting, represented as 0 or 1 (int)
void output (void)
 Set as an output.
void input (void)
 Set as an input.
GpioDigitalInOut & operator= (int rhs)
 A shorthand for write()
virtual operator int (void)
 A shorthand for read()

Detailed Description

GpioDigitalInOut class.

"GpioDigitalInOut" class works like "DigitalInOut" class of mbed-SDK. This class provides pin oriented API, abstracting the GPIO-expander chip.

Example: 

  #include "mbed.h"
  #include "PCAL9555.h"
  
  PCAL9555            gpio_exp( p28, p27, 0x40 );    //  SDA, SCL, Slave_address(option)
  GpioDigitalInOut    pin( gpio_exp, X0_0 );
  
  int main()
  {
      pin.output();
      pin = 0;
      wait_us( 500 );
      pin.input();
      wait_us( 500 );
  }

Definition at line 42 of file GpioDigitalInOut.h.

Member Enumeration Documentation

enum GpioPinName

GPIO-Expander pin names.

Enumerator:
X0_0 

P0_0 pin.

X0_1 

P0_1 pin.

X0_2 

P0_2 pin.

X0_3 

P0_3 pin.

X0_4 

P0_4 pin.

X0_5 

P0_5 pin.

X0_6 

P0_6 pin.

X0_7 

P0_7 pin.

X1_0 

P1_0 pin (for 16-bit GPIO device only)

X1_1 

P1_1 pin (for 16-bit GPIO device only)

X1_2 

P1_2 pin (for 16-bit GPIO device only)

X1_3 

P1_3 pin (for 16-bit GPIO device only)

X1_4 

P1_4 pin (for 16-bit GPIO device only)

X1_5 

P1_5 pin (for 16-bit GPIO device only)

X1_6 

P1_6 pin (for 16-bit GPIO device only)

X1_7 

P1_7 pin (for 16-bit GPIO device only)

X0 

P0_0 pin.

X1 

P0_1 pin.

X2 

P0_2 pin.

X3 

P0_3 pin.

X4 

P0_4 pin.

X5 

P0_5 pin.

X6 

P0_6 pin.

X7 

P0_7 pin.

X8 

P1_0 pin (for 16-bit GPIO device only)

X9 

P1_1 pin (for 16-bit GPIO device only)

X10 

P1_2 pin (for 16-bit GPIO device only)

X11 

P1_3 pin (for 16-bit GPIO device only)

X12 

P1_4 pin (for 16-bit GPIO device only)

X13 

P1_5 pin (for 16-bit GPIO device only)

X14 

P1_6 pin (for 16-bit GPIO device only)

X15 

P1_7 pin (for 16-bit GPIO device only)

X_NC 

for when the pin is left no-connection

Reimplemented in GpioDigitalIn, and GpioDigitalOut.

Definition at line 48 of file GpioDigitalInOut.h.

Constructor & Destructor Documentation

GpioDigitalInOut ( CompGpioExp &  gpiop,
GpioPinName  pin_name 
)

Create a GpioDigitalInOut connected to the specified pin.

Parameters:
gpiopInstance of GPIO expander device
pin_nameDigitalInOut pin to connect to

Definition at line 4 of file GpioDigitalInOut.cpp.

~GpioDigitalInOut (  ) [virtual]

Destractor.

Definition at line 10 of file GpioDigitalInOut.cpp.

Member Function Documentation

void input ( void   )

Set as an input.

Definition at line 34 of file GpioDigitalInOut.cpp.

operator int ( void   ) [virtual]

A shorthand for read()

Definition at line 58 of file GpioDigitalInOut.cpp.

GpioDigitalInOut & operator= ( int  rhs )

A shorthand for write()

Reimplemented in GpioDigitalOut.

Definition at line 46 of file GpioDigitalInOut.cpp.

void output ( void   )

Set as an output.

Definition at line 40 of file GpioDigitalInOut.cpp.

int read ( void   ) [virtual]

Return the output setting, represented as 0 or 1 (int)

Returns:
an integer representing the output setting of the pin if it is an output, or read the input if set as an input

Definition at line 26 of file GpioDigitalInOut.cpp.

void write ( int  v ) [virtual]

Set the output, specified as 0 or 1 (int)

Parameters:
vAn integer specifying the pin output value, 0 for logical 0, 1 (or any other non-zero value) for logical 1

Definition at line 14 of file GpioDigitalInOut.cpp.

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