The PCAL6416A is a low-voltage 16-bit general purpose I/O (GPIO) expander with interrupt. This component library is compatible to basic operation as GPIO expanders: PCAL6416A, 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.
GpioDigitalIn Class Reference
GpioDigitalIn class. More...
#include <GpioDigitalIn.h>
Inherits GpioDigitalInOut.
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 | |
GpioDigitalIn (CompGpioExp &gpiop, GpioPinName pin_name) | |
Create a GpioDigitalInOut connected to the specified pin. | |
virtual | ~GpioDigitalIn () |
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. | |
virtual | operator int (void) |
A shorthand for read() |
Detailed Description
GpioDigitalIn class.
"GpioDigitalIn" class works like "DigitalIn" 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, 0xE8 ); // SDA, SCL, Slave_address(option) GpioDigitalOut pin( gpio_exp, X0_0 ); GpioDigitalIn enable( gpio_exp, X0_0 ); DigitalOut led( LED1 ); int main() { while(1) { if( enable ) { led = !led; } wait(0.25); } }
Definition at line 44 of file GpioDigitalIn.h.
Member Enumeration Documentation
enum GpioPinName |
GPIO-Expander pin names.
- Enumerator:
Reimplemented from GpioDigitalInOut.
Definition at line 50 of file GpioDigitalIn.h.
Constructor & Destructor Documentation
GpioDigitalIn | ( | CompGpioExp & | gpiop, |
GpioPinName | pin_name | ||
) |
Create a GpioDigitalInOut connected to the specified pin.
- Parameters:
-
gpiop Instance of GPIO expander device pin_name DigitalInOut pin to connect to
Definition at line 4 of file GpioDigitalIn.cpp.
~GpioDigitalIn | ( | ) | [virtual] |
Destractor.
Definition at line 10 of file GpioDigitalIn.cpp.
Member Function Documentation
void input | ( | void | ) | [inherited] |
Set as an input.
Definition at line 34 of file GpioDigitalInOut.cpp.
operator int | ( | void | ) | [virtual, inherited] |
A shorthand for read()
Definition at line 58 of file GpioDigitalInOut.cpp.
void output | ( | void | ) | [inherited] |
Set as an output.
Definition at line 40 of file GpioDigitalInOut.cpp.
int read | ( | void | ) | [virtual, inherited] |
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, inherited] |
Set the output, specified as 0 or 1 (int)
- Parameters:
-
v An 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.
Generated on Tue Jul 12 2022 14:15:36 by 1.7.2