SysFsPort.hpp

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/*
 * This file is part of the DUDS project. It is subject to the BSD-style
 * license terms in the LICENSE file found in the top-level directory of this
 * distribution and at https://github.com/jjackowski/duds/blob/master/LICENSE.
 * No part of DUDS, including this file, may be copied, modified, propagated,
 * or distributed except according to the terms contained in the LICENSE file.
 *
 * Copyright (C) 2017  Jeff Jackowski
 */
#include <duds/hardware/interface/DigitalPortIndependentPins.hpp>
#include <fstream>

// !@?!#?!#?
// It was bad enough to find an MS header had "#define interface struct".
// I was hoping such things wouldn't be here, but I was wrong.
#undef linux

namespace duds { namespace hardware { namespace interface {

class PinConfiguration;

namespace linux {

class SysFsPort : public DigitalPortIndependentPins {
    class FsPin {
        std::fstream direction;
        std::fstream value;
        unsigned int fsid;
        bool reqoutval;
        bool curoutval;
        bool isoutput;
    public:
        void open(DigitalPinConfig &conf, DigitalPinCap &cap, unsigned int pin);
        bool read();
        void write(bool state);
        void setDirection(bool output);
    };
    typedef std::vector<FsPin>  FsPinVector;
    FsPinVector fspins;
public:
    /* *
     * Make a SysFsPort object without pins.
     */
    //SysFsPort() { }
    SysFsPort(const std::vector<unsigned int> &ids, unsigned int firstid);
    static std::shared_ptr<SysFsPort> makeConfiguredPort(
        PinConfiguration &pc,
        const std::string &name = "default"
    );
    /* *
     * Make a SysFsPort object with the given pins.
     * @param ids  The key is the pin ID from the filesystem. The value is
     *             the global ID that will be used by this port.
     */
    //SysFsPort(const std::map<unsigned int, unsigned int> &ids);
    #ifdef HAVE_LIBBOOST_FILESYSTEM
    // find the pins
    //SysFsPort();
    #endif
    virtual ~SysFsPort();

    // virtual functions required by Digitalport
protected:
    virtual void configurePort(
        unsigned int localPinId,
        const DigitalPinConfig &cfg,
        DigitalPinAccessBase::PortData *
    );
    virtual bool inputImpl(unsigned int gid, DigitalPinAccessBase::PortData *);
    virtual void outputImpl(
        unsigned int lid,
        bool state,
        DigitalPinAccessBase::PortData *
    );
public:
    virtual bool simultaneousOperations() const;
};

} } } } // namespaces