ChipSelect.cpp

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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/ChipSelect.hpp>
#include <duds/hardware/interface/ChipSelectErrors.hpp>
#include <duds/general/Errors.hpp>

namespace duds { namespace hardware { namespace interface {

ChipSelect::ChipSelect() noexcept : cid(-1) { }

ChipSelect::ChipSelect(
    const std::shared_ptr<ChipSelectManager> &csm,
    int chipId
) {
    modify(csm, chipId);
}

ChipSelect::ChipSelect(
    std::shared_ptr<ChipSelectManager> &&csm,
    int chipId
) {
    modify(std::move(csm), chipId);
}

std::unique_ptr<ChipAccess> ChipSelect::access() {
    if (!mgr) {
        DUDS_THROW_EXCEPTION(ChipSelectBadManager() <<
            ChipSelectIdError(cid));
    }
    return mgr->access(cid);
}

void ChipSelect::access(ChipAccess &acc) {
    if (!mgr) {
        DUDS_THROW_EXCEPTION(ChipSelectBadManager() <<
            ChipSelectIdError(cid));
    }
    mgr->access(acc, cid);
}

std::unique_ptr<ChipAccess> ChipSelect::select() {
    if (!mgr) {
        DUDS_THROW_EXCEPTION(ChipSelectBadManager() <<
            ChipSelectIdError(cid));
    }
    return mgr->select(cid);
}

void ChipSelect::select(ChipAccess &acc) {
    if (!mgr) {
        DUDS_THROW_EXCEPTION(ChipSelectBadManager() <<
            ChipSelectIdError(cid));
    }
    mgr->select(acc, cid);
}

void ChipSelect::modify(const std::shared_ptr<ChipSelectManager> &csm, int chipId) {
    if (csm && (chipId >= 0)) {
        if (!csm->validChip(chipId)) {
            DUDS_THROW_EXCEPTION(ChipSelectInvalidChip() <<
                ChipSelectIdError(chipId));
        }
        mgr = csm;
        cid = chipId;
    }
    else {
        reset();
    }
}

void ChipSelect::modify(std::shared_ptr<ChipSelectManager> &&csm, int chipId) {
    if (csm && (chipId >= 0)) {
        if (!csm->validChip(chipId)) {
            DUDS_THROW_EXCEPTION(ChipSelectInvalidChip() <<
                ChipSelectIdError(chipId));
        }
        mgr = csm;
        cid = chipId;
    }
    else {
        reset();
    }
}

void ChipSelect::reset() noexcept {
    mgr.reset();
    cid = -1;
}

} } }