text: /****************************************************************************
   * apps/examples/ina219/ina219_main.c
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.  The
   * ASF licenses this file to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the
   * License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  #include <inttypes.h>
  #include <stdio.h>
  #include <fcntl.h>
  #include <unistd.h>
  #include <nuttx/sensors/ina219.h>
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * ina219_main
   ****************************************************************************/
  
  int main(int argc, FAR char *argv[])
  {
    struct ina219_s sample;
    int fd;
    int ret;
  
    fd = open("/dev/ina219", O_RDWR);
    while (1)
      {
        ret = read(fd, &sample, sizeof(sample));
        if (ret != sizeof(sample))
          {
            break;
          }
  
        printf("U=%12" PRIu32 " uV I=%12" PRId32 " uA\n",
               sample.voltage, sample.current);
      }
  
    close(fd);
    return 0;
  }
  