forked from Archive/PX4-Autopilot
149 lines
4.1 KiB
C
149 lines
4.1 KiB
C
/****************************************************************************
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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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int test_adc(int argc, char *argv[])
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{
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int fd0 = 0;
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int ret = 0;
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#pragma pack(push,1)
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struct adc_msg4_s {
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uint8_t am_channel1; /**< The 8-bit ADC Channel 1 */
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int32_t am_data1; /**< ADC convert result 1 (4 bytes) */
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uint8_t am_channel2; /**< The 8-bit ADC Channel 2 */
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int32_t am_data2; /**< ADC convert result 2 (4 bytes) */
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uint8_t am_channel3; /**< The 8-bit ADC Channel 3 */
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int32_t am_data3; /**< ADC convert result 3 (4 bytes) */
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uint8_t am_channel4; /**< The 8-bit ADC Channel 4 */
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int32_t am_data4; /**< ADC convert result 4 (4 bytes) */
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};
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#pragma pack(pop)
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struct adc_msg4_s sample1;
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ssize_t nbytes;
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int j;
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int errval;
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fd0 = open("/dev/adc0", O_RDONLY | O_NONBLOCK);
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if (fd0 <= 0) {
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message("/dev/adc0 open fail: %d\n", errno);
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return ERROR;
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} else {
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message("opened /dev/adc0 successfully\n");
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}
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usleep(10000);
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for (j = 0; j < 10; j++) {
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/* sleep 20 milliseconds */
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usleep(20000);
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nbytes = read(fd0, &sample1, sizeof(sample1));
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/* Handle unexpected return values */
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if (nbytes < 0) {
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errval = errno;
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if (errval != EINTR) {
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message("reading /dev/adc0 failed: %d\n", errval);
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errval = 3;
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goto errout_with_dev;
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}
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message("\tinterrupted read..\n");
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} else if (nbytes == 0) {
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message("\tno data read, ignoring.\n");
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ret = ERROR;
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}
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/* Print the sample data on successful return */
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else {
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if (nbytes != sizeof(sample1)) {
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message("\tsample 1 size %d is not matching struct size %d, ignoring\n",
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nbytes, sizeof(sample1));
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ret = ERROR;
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} else {
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message("CYCLE %d:\n", j);
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message("channel: %d value: %d\n",
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(int)sample1.am_channel1, sample1.am_data1);
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message("channel: %d value: %d\n",
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(int)sample1.am_channel2, sample1.am_data2);
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message("channel: %d value: %d\n",
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(int)sample1.am_channel3, sample1.am_data3);
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message("channel: %d value: %d\n",
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(int)sample1.am_channel4, sample1.am_data4);
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}
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}
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fflush(stdout);
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}
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message("\t ADC test successful.\n");
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errout_with_dev:
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if (fd0 != 0) close(fd0);
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return ret;
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}
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