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94 lines
2.8 KiB
94 lines
2.8 KiB
/**************************************************************************** |
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* |
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* Copyright (C) 2012 PX4 Development Team. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name PX4 nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/** |
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* @file test_adc.c |
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* Test for the analog to digital converter. |
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*/ |
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#include <nuttx/config.h> |
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#include <nuttx/arch.h> |
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#include <sys/types.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <nuttx/spi.h> |
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#include "tests.h" |
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#include <nuttx/analog/adc.h> |
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#include <drivers/drv_adc.h> |
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#include <systemlib/err.h> |
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int test_adc(int argc, char *argv[]) |
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{ |
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int fd = open(ADC_DEVICE_PATH, O_RDONLY); |
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if (fd < 0) { |
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warnx("ERROR: can't open ADC device"); |
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return 1; |
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} |
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for (unsigned i = 0; i < 5; i++) { |
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/* make space for a maximum of eight channels */ |
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struct adc_msg_s data[8]; |
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/* read all channels available */ |
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ssize_t count = read(fd, data, sizeof(data)); |
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if (count < 0) |
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goto errout_with_dev; |
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unsigned channels = count / sizeof(data[0]); |
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for (unsigned j = 0; j < channels; j++) { |
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printf("%d: %u ", data[j].am_channel, data[j].am_data); |
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} |
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printf("\n"); |
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usleep(150000); |
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} |
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warnx("\t ADC test successful.\n"); |
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errout_with_dev: |
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if (fd != 0) close(fd); |
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return OK; |
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}
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