kopia lustrzana https://github.com/mobilinkd/NucleoTNC
54 wiersze
1.3 KiB
C++
54 wiersze
1.3 KiB
C++
// Copyright 2016 Rob Riggs <rob@mobilinkd.com>
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// All rights reserved.
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#include "HdlcDecoder.hpp"
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#include "GPIO.hpp"
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namespace mobilinkd { namespace tnc { namespace hdlc {
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Decoder::Decoder(bool pass_all)
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: state_(SEARCH), ones_(0), buffer_(0), frame_(ioFramePool().acquire())
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, bits_(0), passall_(pass_all), ready_(false)
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{}
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IoFrame* Decoder::operator()(bool bit, bool pll)
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{
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IoFrame* result = nullptr;
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// It appears that the ioFramePool may not get initialized in the proper
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// order during some builds.
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if (nullptr == frame_) frame_ = ioFramePool().acquire();
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if (nullptr == frame_) return result;
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if (not pll) {
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if ((state_ == FRAMING) and (frame_->size() > 17) and passall_) {
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frame_->parse_fcs();
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if (passall_ or frame_->ok()) {
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result = frame_;
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ready_ = false;
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frame_ = ioFramePool().acquire();
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return result;
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}
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}
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reset();
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} else {
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if (process(bit)) {
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ready_ = false;
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frame_->parse_fcs();
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if (passall_ or frame_->ok()) {
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result = frame_;
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frame_ = ioFramePool().acquire();
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return result;
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}
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frame_->clear();
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}
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}
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return result;
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}
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}}} // mobilinkd::tnc::hdlc
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