25b92edd9f
apps/builtin/exec_builtin.c: Try posix_spawn if builtin apps do not have have an entry point.
apps/Application.mk: introduce MODULE config to simplify tristate(m)
apps/nsh: Change the nuttx shell module type to tristate
apps: Add loadable application support
script/mksymtab: Generate symbol table name by default
apps/builtin: Allow loadable applications can register with apps/builtin.
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/****************************************************************************
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* examples/obd2/obd2_main.c
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <stdio.h>
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#include "canutils/obd.h"
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#include "canutils/obd_pid.h"
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#include "canutils/obd_frame.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* obd2_main
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****************************************************************************/
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#ifdef CONFIG_BUILD_LOADABLE
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int main(int argc, FAR char *argv[])
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#else
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int obd2_main(int argc, char *argv[])
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#endif
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{
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struct obd_dev_s *dev;
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int ret;
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dev = obd_init("/dev/can0", 0, 0);
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if (!dev)
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{
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printf("Failed to initialize the OBD-II device!\n");
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return -1;
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}
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/* Request the RPM */
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ret = obd_send_request(dev, OBD_SHOW_DATA, OBD_PID_RPM);
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if (ret < 0)
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{
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printf("Failed to request RPM!\n");
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return -1;
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}
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/* Wait for response */
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ret = obd_wait_response(dev, OBD_SHOW_DATA, OBD_PID_RPM, 100);
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if (ret < 0)
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{
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printf("Failed to receive the response!\n");
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return -1;
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}
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/* Decode the received PID */
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printf("RPM = %s\n", obd_decode_pid(dev, OBD_PID_RPM));
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return 0;
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}
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