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148 lines
4.1 KiB
148 lines
4.1 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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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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