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https://gitea.osmocom.org/cellular-infrastructure/osmo-trx.git
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1303376ad1
Extend the measured SCH timing offset from the downlink to the uplink path. In order to absorb the frame timing adjustment and remove the potential of thread contention during the change, combine the lower FIFO threads into single drive loop. Force timing changes through to the UHD interface with stream flags triggered through the updateAlignment() call. Signed-off-by: Thomas Tsou <tom@tsou.cc>
89 lines
2.0 KiB
C++
89 lines
2.0 KiB
C++
/*
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* Written by Thomas Tsou <ttsou@vt.edu>
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* Based on code by Harvind S Samra <hssamra@kestrelsp.com>
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*
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* Copyright 2011 Free Software Foundation, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* See the COPYING file in the main directory for details.
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*/
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#include "radioClock.h"
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void RadioClock::set(const GSM::Time& wTime)
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{
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mLock.lock();
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mClock = wTime;
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updateSignal.signal();
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mLock.unlock();
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}
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GSM::Time RadioClock::adjust(GSM::Time &wBase, GSM::Time &wOffset)
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{
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int tn_diff, fn_diff = 0;
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/* Modulo TN adustment */
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tn_diff = wBase.TN() + wOffset.TN();
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if (tn_diff < 0) {
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tn_diff += 8;
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fn_diff--;
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} else if (tn_diff >= 8) {
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tn_diff -= 8;
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fn_diff++;
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}
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/* Modulo FN adjustment */
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fn_diff += wBase.FN() + wOffset.FN();
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if (fn_diff < 0)
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fn_diff += GSM::gHyperframe;
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else if ((unsigned) fn_diff >= GSM::gHyperframe)
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fn_diff = fn_diff - GSM::gHyperframe;
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return GSM::Time(fn_diff, tn_diff);
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}
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void RadioClock::adjust(GSM::Time& wOffset)
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{
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mLock.lock();
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mClock = adjust(mClock, wOffset);
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updateSignal.signal();
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mLock.unlock();
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}
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void RadioClock::incTN()
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{
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mLock.lock();
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mClock.incTN();
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updateSignal.signal();
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mLock.unlock();
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}
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GSM::Time RadioClock::get()
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{
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mLock.lock();
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GSM::Time retVal = mClock;
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mLock.unlock();
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return retVal;
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}
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void RadioClock::wait()
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{
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mLock.lock();
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updateSignal.wait(mLock,1);
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mLock.unlock();
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}
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