107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/****************************************************************************
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* examples/powermonitor/powermonitor_main.c
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*
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* Copyright (C) 2017 Giorgi Groß. All rights reserved.
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* Author: Giorgio Groß <giorgio.gross@robodev.eu>
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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 NuttX 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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* Included Files
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******************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <debug.h>
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#include <stdio.h>
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#include <fixedmath.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <nuttx/sensors/ltc4151.h>
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/******************************************************************************
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* Pre-processor Definitions
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******************************************************************************/
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#define DECIMAL_PLACES3(x) abs(((int)(((x)-((int)x))*1000)))
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/******************************************************************************
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* Public Functions
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******************************************************************************/
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int main(int argc, char *argv[])
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{
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static FAR const char *pwrmntr_dev = "/dev/pwrmntr0";
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float float_current;
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float float_voltage;
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ltc4151_t ltc;
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int pwrmntr_fd;
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int samples;
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int sample;
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samples = 1;
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if (argc > 1)
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{
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samples = atoi(argv[1]);
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}
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pwrmntr_fd = open(pwrmntr_dev, O_RDONLY);
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if (pwrmntr_fd < 0)
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{
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printf("Failed to open %s: %d\n", pwrmntr_dev, errno);
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return 1;
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}
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for (sample = 0; sample < samples; ++sample)
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{
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if (read(pwrmntr_fd, <c, sizeof(ltc)) < 0)
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{
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printf("Failed to read from %s: %d\n", pwrmntr_dev, errno);
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return 1;
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}
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float_current = b16tof(ltc.current);
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float_voltage = b16tof(ltc.voltage);
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printf("Current: %d.%03dmA - Voltage: %d.%03dV\n",
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(int)float_current, DECIMAL_PLACES3(float_current),
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(int)float_voltage, DECIMAL_PLACES3(float_voltage));
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}
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close(pwrmntr_fd);
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return 0;
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}
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