fxas21002c_main.cpp

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/****************************************************************************
 *
 *   Copyright (c) 2017-2019 PX4 Development Team. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
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 ****************************************************************************/

#include "FXAS21002C.hpp"

extern "C" { __EXPORT int fxas21002c_main(int argc, char *argv[]); }

/**
 * Local functions in support of the shell command.
 */
namespace fxas21002c
{

FXAS21002C  *g_dev;

void    start(bool external_bus, enum Rotation rotation);
void    info();
void    regdump();
void    usage();
void    test_error();

/**
 * Start the driver.
 *
 * This function call only returns once the driver is
 * up and running or failed to detect the sensor.
 */
void
start(bool external_bus, enum Rotation rotation)
{
    if (g_dev != nullptr) {
        PX4_INFO("already started");
        exit(0);
    }

    /* create the driver */
    if (external_bus) {
#if defined(PX4_SPI_BUS_EXT) && defined(PX4_SPIDEV_EXT_GYRO)
        g_dev = new FXAS21002C(PX4_SPI_BUS_EXT, PX4_SPIDEV_EXT_GYRO, rotation);
#else
        PX4_ERR("External SPI not available");
        exit(0);
#endif

    } else {
        g_dev = new FXAS21002C(PX4_SPI_BUS_SENSORS, PX4_SPIDEV_GYRO, rotation);
    }

    if (g_dev == nullptr) {
        PX4_ERR("failed instantiating FXAS21002C obj");
        goto fail;
    }

    if (OK != g_dev->init()) {
        goto fail;
    }

    exit(0);
fail:

    if (g_dev != nullptr) {
        delete g_dev;
        g_dev = nullptr;
    }

    errx(1, "driver start failed");
}

/**
 * Print a little info about the driver.
 */
void
info()
{
    if (g_dev == nullptr) {
        PX4_ERR("driver not running\n");
        exit(1);
    }

    printf("state @ %p\n", g_dev);
    g_dev->print_info();

    exit(0);
}

/**
 * dump registers from device
 */
void
regdump()
{
    if (g_dev == nullptr) {
        PX4_ERR("driver not running\n");
        exit(1);
    }

    printf("regdump @ %p\n", g_dev);
    g_dev->print_registers();

    exit(0);
}

/**
 * trigger an error
 */
void
test_error()
{
    if (g_dev == nullptr) {
        PX4_ERR("driver not running\n");
        exit(1);
    }

    g_dev->test_error();

    exit(0);
}

void
usage()
{
    PX4_INFO("missing command: try 'start', 'info', 'testerror' or 'regdump'");
    PX4_INFO("options:");
    PX4_INFO("    -X    (external bus)");
    PX4_INFO("    -R rotation");
}

} // namespace

int
fxas21002c_main(int argc, char *argv[])
{
    bool external_bus = false;
    enum Rotation rotation = ROTATION_NONE;

    int ch = 0;
    int myoptind = 1;
    const char *myoptarg = NULL;

    while ((ch = px4_getopt(argc, argv, "XR:", &myoptind, &myoptarg)) != EOF) {
        switch (ch) {
        case 'X':
            external_bus = true;
            break;

        case 'R':
            rotation = (enum Rotation)atoi(myoptarg);
            break;

        default:
            fxas21002c::usage();
            return 0;
        }
    }

    const char *verb = argv[myoptind];

    /*
     * Start/load the driver.

     */
    if (!strcmp(verb, "start")) {
        fxas21002c::start(external_bus, rotation);
    }

    /*
     * Print driver information.
     */
    if (!strcmp(verb, "info")) {
        fxas21002c::info();
    }

    /*
     * dump device registers
     */
    if (!strcmp(verb, "regdump")) {
        fxas21002c::regdump();
    }

    /*
     * trigger an error
     */
    if (!strcmp(verb, "testerror")) {
        fxas21002c::test_error();
    }

    PX4_WARN("unrecognized command, try 'start', 'info', 'testerror' or 'regdump'");
    return -1;
}