digital_inputs.cpp

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/*
 * Copyright (c) 2019, Open Source Robotics Foundation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of the copyright holder 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
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#include <functional>
#include <memory>
 
#include <libphidget22/phidget22.h>
 
#include "phidgets_api/digital_input.h"
#include "phidgets_api/digital_inputs.h"
#include "phidgets_api/phidget22.h"
 
namespace phidgets {
 
DigitalInputs::DigitalInputs(int32_t serial_number, int hub_port,
                             bool is_hub_port_device,
                             std::function<void(int, int)> input_handler)
{
    PhidgetReturnCode ret;
 
    PhidgetDigitalInputHandle di_handle;
 
    ret = PhidgetDigitalInput_create(&di_handle);
    if (ret != EPHIDGET_OK)
    {
        throw Phidget22Error(
            "Failed to create DigitalInput handle for determining channel "
            "count",
            ret);
    }
 
    PhidgetHandle handle = reinterpret_cast<PhidgetHandle>(di_handle);
 
    helpers::openWaitForAttachment(handle, serial_number, hub_port,
                                   is_hub_port_device, 0);
 
    ret = Phidget_getDeviceChannelCount(handle, PHIDCHCLASS_DIGITALINPUT,
                                        &input_count_);
 
    helpers::closeAndDelete(&handle);
 
    if (ret != EPHIDGET_OK)
    {
        throw Phidget22Error("Failed to get DigitalInput device channel count",
                             ret);
    }
 
    dis_.resize(input_count_);
    for (uint32_t i = 0; i < input_count_; ++i)
    {
        dis_[i] = std::make_unique<DigitalInput>(
            serial_number, hub_port, is_hub_port_device, i, input_handler);
    }
}
 
DigitalInputs::~DigitalInputs()
{
}
 
uint32_t DigitalInputs::getInputCount() const noexcept
{
    return input_count_;
}
 
bool DigitalInputs::getInputValue(int index) const
{
    return dis_.at(index)->getInputValue();
}
 
}  // namespace phidgets