Aio Class Reference

Detailed Description

This file defines the aio interface for libmraa

#include "mraa.hpp"

int
main()
{
    uint16_t adc_value;
    float adc_value_float;
    mraa::Aio* a0;

    a0 = new mraa::Aio(0);
    if (a0 == NULL) {
        return MRAA_ERROR_UNSPECIFIED;
    }

    for (;;) {
        adc_value = a0->read();
        adc_value_float = a0->readFloat();
        fprintf(stdout, "ADC A0 read %X - %d\n", adc_value, adc_value);
        fprintf(stdout, "ADC A0 read float - %.5f\n", adc_value_float);
    }

    return MRAA_SUCCESS;
}

Public Member Functions
	Aio (unsigned int pin)
	~Aio ()
int	read ()
float	readFloat ()
mraa_result_t	setBit (int bits)
int	getBit ()

Constructor & Destructor Documentation

Aio ( unsigned int  pin )

inline

Aio Constructor, takes a pin number which will map directly to the board number

Parameters

pin	channel number to read ADC inputs

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~Aio ( )

inline

Aio destructor

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Member Function Documentation

int read ( )

inline

Read a value from the AIO pin. By default mraa will shift the raw value up or down to a 10 bit value.

Returns

The current input voltage. By default, a 10bit value

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float readFloat ( )

inline

Read a value from the AIO pin and return it as a normalized float.

Returns

The current input voltage as a normalized float (0.0f-1.0f)

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mraa_result_t setBit ( int  bits )

inline

Set the bit value which mraa will shift the raw reading from the ADC to. I.e. 10bits

Parameters

bits	the bits the return from read should be i.e 10

Returns

mraa result type

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int getBit ( )

inline

Gets the bit value mraa is shifting the analog read to.

Returns

bit value mraa is set return from the read function

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

• /var/lib/jenkins/workspace/mraa-doc-stable/api/mraa/aio.hpp