mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2025-06-29 10:35:24 +02:00
81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
/*
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* © 2025 Harald Barth
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*
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* This file is part of CommandStation-EX
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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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* It 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifdef ARDUINO_ARCH_ESP32
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#include <Arduino.h>
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#include <list>
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#include "driver/mcpwm.h"
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#include "soc/mcpwm_struct.h"
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#include "soc/mcpwm_reg.h"
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#define MAXDCCPACKETLEN 8
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#include "DCCPacket.h"
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class Sniffer {
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public:
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Sniffer(byte snifferpin);
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void IRAM_ATTR processInterrupt(int32_t capticks, bool posedge);
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inline int32_t getTicks() {
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noInterrupts();
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int32_t i = diffticks;
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interrupts();
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return i;
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};
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inline int64_t getDebug() {
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noInterrupts();
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int64_t i = debugfield;
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interrupts();
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return i;
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};
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inline DCCPacket fetchPacket() {
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// if there is no new data, this will create a
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// packet with length 0 (which is no packet)
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DCCPacket p;
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noInterrupts();
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if (!outpacket.empty()) {
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p = outpacket.front();
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outpacket.pop_front();
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}
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if (fetchflag) {
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fetchflag = false; // (data has been fetched)
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}
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interrupts();
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return p;
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};
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bool inputActive();
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private:
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// keep these vars in processInterrupt only
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uint64_t bitfield = 0;
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uint64_t debugfield = 0;
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int32_t diffticks;
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int32_t lastticks;
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bool lastedge;
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byte currentbyte = 0;
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byte dccbytes[MAXDCCPACKETLEN];
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byte dcclen = 0;
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bool inpacket = false;
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// these vars are used as interface to other parts of sniffer
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byte halfbitcounter = 0;
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bool fetchflag = false;
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std::list<DCCPacket> outpacket;
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DCCPacket prevpacket;
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volatile unsigned long lastendofpacket = 0; // timestamp millis
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};
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#endif
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