mb704x.h File Reference

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API Description

/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2016 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <unistd.h>
#include <signal.h>

#include <upm_utilities.h>
#include <mb704x.h>

bool shouldRun = true;

void sig_handler(int signo)
{
  if (signo == SIGINT)
    shouldRun = false;
}

int main()
{
    signal(SIGINT, sig_handler);


    // Instantiate a MB704X sensor on i2c bus 0, address 112.
    mb704x_context sensor = mb704x_init(0, 112);

    if (!sensor)
    {
        printf("mb704x_init() failed.\n");
        return 1;
    }

    while (shouldRun)
    {
        // this will take about 1 second to complete
        int range = mb704x_get_range(sensor);
        if (range < 0)
        {
            printf("Error getting range.\n");
        }
        else
        {
            printf("Range: %d cm\n", range);
        }

        upm_delay_ms(500);
    }

    printf("Exiting\n");

    mb704x_close(sensor);


    return 0;
}

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Data Structures
struct	_mb704x_context

Functions
mb704x_context	mb704x_init (unsigned int bus, int addr)
void	mb704x_close (mb704x_context dev)
int	mb704x_get_range (const mb704x_context dev)

Typedefs
typedef struct _mb704x_context *	mb704x_context

Function Documentation

mb704x_context mb704x_init	(	unsigned int	bus,
		int	addr
	)

MB704X Initializer

Parameters

bus	Specify which the I2C bus to use.
addr	Specify the I2C address to use. The default is 112.

Returns

an initialized device context on success, NULL on error.

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void mb704x_close

(

mb704x_context

dev

)

MB704X sensor close function

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int mb704x_get_range

(

const mb704x_context

dev

)

Query the device for a range reading. The range will be reported in centimeters (cm).

Parameters

dev	Device context

Returns

Measured range, -1 on error. The range is reported in centimeters (cm).

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Typedef Documentation

typedef struct _mb704x_context * mb704x_context

Device context