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/****************************************************************************
*
* Copyright (C) 2012 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file test_adc.c
* Test for the analog to digital converter.
*/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/spi.h>
#include "tests.h"
#include <nuttx/analog/adc.h>
#include <drivers/drv_adc.h>
#include <systemlib/err.h>
int test_adc(int argc, char *argv[])
{
int fd = open(ADC_DEVICE_PATH, O_RDONLY);
if (fd < 0) {
warnx("ERROR: can't open ADC device");
return 1;
}
for (unsigned i = 0; i < 5; i++) {
/* make space for a maximum of twelve channels */
struct adc_msg_s data[12];
/* read all channels available */
ssize_t count = read(fd, data, sizeof(data));
if (count < 0)
goto errout_with_dev;
unsigned channels = count / sizeof(data[0]);
for (unsigned j = 0; j < channels; j++) {
printf("%d: %u ", data[j].am_channel, data[j].am_data);
}
printf("\n");
usleep(150000);
}
warnx("\t ADC test successful.\n");
errout_with_dev:
if (fd != 0) close(fd);
return OK;
}
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