Iio Class Reference

Detailed Description

This file defines the C++ iio interface for libmraa

    IioTestHandler testHandler;
    std::string deviceName;
    try {
        mraa::Iio* iio_device0 = new mraa::Iio(0);
        std::cout << "IIO device 0 found by id." << std::endl;
        deviceName = iio_device0->getDeviceName();
        delete iio_device0;
    } catch (std::exception& e) {
        std::cerr << "IIO device 0 not found." << std::endl;
        return EXIT_FAILURE;
    }

    try {
        mraa::Iio* iio_device1 = new mraa::Iio(1);
        delete iio_device1;
    } catch (std::exception& e) {
        std::cerr << "IIO device 1 not found. This is expected behavior." << std::endl;
    }

    try {
        iio_device = new mraa::Iio(deviceName);
        std::cout << "IIO device 0 found by name." << std::endl;
    } catch (std::exception& e) {
        std::cerr << "IIO device 0 not found." << std::endl;
        return EXIT_FAILURE;
    }

    std::cout << "Using IIO device0. Name is " << iio_device->getDeviceName() << std::endl;
    IIO_RUN(writeFloat, "in_accel_x_raw", 100, EXPECT_FAILURE);
    IIO_RUN(writeFloat, "in_voltage0_scale", 100, EXPECT_FAILURE);
    IIO_RUN(writeInt, "out_voltage0_raw", 100, EXPECT_SUCCESS);
    IIO_TEST(readInt, "in_accel_x_raw", 34, EXPECT_SUCCESS);
    IIO_TEST(readFloat, "in_voltage0_scale", 0.001333, EXPECT_SUCCESS);
    IIO_RUN(writeInt, "events/in_voltage0_thresh_rising_en", 1, EXPECT_SUCCESS);
    IIO_TRY(registerEventHandler(&testHandler));
    eventCount = 0;
    generate_event();
    usleep(500000);
    log_result("eventReceived", "", (eventCount == 1), true);

Public Member Functions
	Iio (int device)
	Iio (const std::string &deviceName)
	~Iio ()
std::string	getDeviceName () const
int	readInt (const std::string &attributeName) const
float	readFloat (const std::string &attributeName) const
void	writeInt (const std::string &attributeName, int value) const
void	writeFloat (const std::string &attributeName, float value) const
void	registerEventHandler (IioHandler *handler) const

Constructor & Destructor Documentation

Iio ( int  device )

inline

Iio Constructor, takes a device number which will map directly to sysfs e.g. device 0 maps to /sys/bus/iio/devices/iio:device0

Parameters

device

IIO device number

Exceptions

std::invalid_argument

if initialization fails

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Iio ( const std::string &  deviceName )

inline

Iio Constructor

Parameters

deviceName

IIO device name

Exceptions

std::invalid_argument

if initialization fails

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~Iio ( )

inline

Iio destructor

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Member Function Documentation

std::string getDeviceName ( ) const

inline

Get device name

Returns

The device name

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int readInt ( const std::string &  attributeName ) const

inline

Read an int value from specified attribute.

Parameters

attributeName

attribute mame

Returns

The int value

Exceptions

std::invalid_argument

if read fails

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float readFloat ( const std::string &  attributeName ) const

inline

Read a float value from specified attribute.

Parameters

attributeName

attribute mame

Returns

The float value

Exceptions

std::invalid_argument

if read fails

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void writeInt ( const std::string &  attributeName, int  value  ) const

inline

Write an int value to specified attribute.

Parameters

attributeName	attribute mame
value	int value

Exceptions

std::invalid_argument

if write fails

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void writeFloat ( const std::string &  attributeName, float  value  ) const

inline

Write a float value to specified attribute.

Parameters

attributeName	attribute mame
value	float value

Exceptions

std::invalid_argument

if write fails

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void registerEventHandler ( IioHandler *  handler ) const

inline

Register event handler.

Parameters

handler

handler class that implements IioHandler

Exceptions

std::invalid_argument

on failure

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

• api/mraa/iio.hpp