mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-12-24 21:21:24 +01:00
5269177f2e
NOTE: the ones in MemStream are not mine!
80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
#ifndef DCCWaveform_h
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#define DCCWaveform_h
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const int POWER_SAMPLE_MAX = 300;
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const int POWER_SAMPLE_ON_WAIT = 100;
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const int POWER_SAMPLE_OFF_WAIT = 1000;
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const int POWER_SAMPLE_OVERLOAD_WAIT = 4000;
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// ACK current analogRead values (vary depending on motor shield and cpu voltage)
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const int ACK_BASELINE_SAMPLES = 250 ; // current samples before sending ACKable request
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const int ACK_TIMEOUT = 25 ; // millis getAck is prepared to wait for a signal
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const int ACK_MIN_PULSE = 60 ; // current above baseline which a pulse is recognised
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const int PREAMBLE_BITS_MAIN = 20;
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const int PREAMBLE_BITS_PROG = 22;
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const byte MAX_PACKET_SIZE = 12;
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// NOTE: static functions are used for the overall controller, then
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// one instance is created for each track.
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enum class POWERMODE { OFF, ON, OVERLOAD };
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const byte idlePacket[] = {0xFF, 0x00, 0xFF};
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const byte resetPacket[] = {0x00, 0x00, 0x00};
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class DCCWaveform {
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public:
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DCCWaveform( byte preambleBits, bool isMain);
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static void begin();
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static void loop();
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static DCCWaveform mainTrack;
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static DCCWaveform progTrack;
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void beginTrack();
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void setPowerMode(POWERMODE);
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POWERMODE getPowerMode();
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void checkPowerOverload();
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int getLastCurrent();
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void schedulePacket(const byte buffer[], byte byteCount, byte repeats);
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volatile bool packetPending;
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volatile byte sentResetsSincePacket;
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void killRemainingRepeats();
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private:
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static void interruptHandler();
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bool interrupt1();
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void interrupt2();
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bool isMainTrack;
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// Transmission controller
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byte transmitPacket[MAX_PACKET_SIZE]; // packet being transmitted
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byte transmitLength;
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byte transmitRepeats; // remaining repeats of transmission
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byte remainingPreambles;
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byte requiredPreambles;
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bool currentBit; // bit to be transmitted
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byte bits_sent; // 0-8 (yes 9 bits) sent for current byte
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byte bytes_sent; // number of bytes sent from transmitPacket
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byte state; // wave generator state machine
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byte pendingPacket[MAX_PACKET_SIZE];
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byte pendingLength;
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byte pendingRepeats;
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int lastCurrent;
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// current sampling
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POWERMODE powerMode;
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unsigned long lastSampleTaken;
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unsigned int sampleDelay;
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};
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#endif
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