mirror of
https://github.com/DCC-EX/CommandStation-EX.git
synced 2024-11-23 08:06:13 +01:00
226 lines
8.4 KiB
C++
226 lines
8.4 KiB
C++
/*
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* © 2020, Chris Harlow. All rights reserved.
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*
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* This file is part of Asbelos DCC API
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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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#ifndef DCC_h
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#define DCC_h
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#include <Arduino.h>
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#include "MotorDriver.h"
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#include "MotorDrivers.h"
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#include "FSH.h"
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#include "defines.h"
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#ifndef HIGHEST_SHORT_ADDR
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#define HIGHEST_SHORT_ADDR 127
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#else
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#if HIGHEST_SHORT_ADDR > 127
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#error short addr greater than 127 does not make sense
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#endif
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#endif
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const uint16_t LONG_ADDR_MARKER = 0x4000;
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typedef void (*ACK_CALLBACK)(int16_t result);
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enum ackOp : byte
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{ // Program opcodes for the ack Manager
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BASELINE, // ensure enough resets sent before starting and obtain baseline current
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W0,
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W1, // issue write bit (0..1) packet
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WB, // issue write byte packet
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VB, // Issue validate Byte packet
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V0, // Issue validate bit=0 packet
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V1, // issue validate bit=1 packlet
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WACK, // wait for ack (or absence of ack)
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ITC1, // If True Callback(1) (if prevous WACK got an ACK)
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ITC0, // If True callback(0);
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ITCB, // If True callback(byte)
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ITCBV, // If True callback(byte) - end of Verify Byte
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ITCB7, // If True callback(byte &0x7F)
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NAKFAIL, // if false callback(-1)
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FAIL, // callback(-1)
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BIV, // Set ackManagerByte to initial value for Verify retry
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STARTMERGE, // Clear bit and byte settings ready for merge pass
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MERGE, // Merge previous wack response with byte value and decrement bit number (use for readimng CV bytes)
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SETBIT, // sets bit number to next prog byte
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SETCV, // sets cv number to next prog byte
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SETBYTE, // sets current byte to next prog byte
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SETBYTEH, // sets current byte to word high byte
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SETBYTEL, // sets current byte to word low byte
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STASHLOCOID, // keeps current byte value for later
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COMBINELOCOID, // combines current value with stashed value and returns it
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ITSKIP, // skip to SKIPTARGET if ack true
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SKIPTARGET = 0xFF // jump to target
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};
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enum CALLBACK_STATE : byte {
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AFTER_WRITE, // Start callback sequence after something was written to the decoder
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WAITING_100, // Waiting for 100mS of stable power
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WAITING_30, // waiting to 30ms of power off gap.
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READY, // Ready to complete callback
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};
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// Allocations with memory implications..!
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// Base system takes approx 900 bytes + 8 per loco. Turnouts, Sensors etc are dynamically created
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#if defined(ARDUINO_AVR_UNO)
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const byte MAX_LOCOS = 20;
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#elif defined(ARDUINO_AVR_NANO)
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const byte MAX_LOCOS = 30;
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#else
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const byte MAX_LOCOS = 50;
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#endif
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class DCC
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{
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public:
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static void begin(const FSH * motorShieldName, MotorDriver *mainDriver, MotorDriver *progDriver);
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static void setJoinRelayPin(byte joinRelayPin);
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static void loop();
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// Public DCC API functions
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static void setThrottle(uint16_t cab, uint8_t tSpeed, bool tDirection);
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static uint8_t getThrottleSpeed(int cab);
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static bool getThrottleDirection(int cab);
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static void writeCVByteMain(int cab, int cv, byte bValue);
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static void writeCVBitMain(int cab, int cv, byte bNum, bool bValue);
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static void setFunction(int cab, byte fByte, byte eByte);
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static void setFn(int cab, int16_t functionNumber, bool on);
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static int changeFn(int cab, int16_t functionNumber, bool pressed);
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static int getFn(int cab, int16_t functionNumber);
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static void updateGroupflags(byte &flags, int16_t functionNumber);
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static void setAccessory(int aAdd, byte aNum, bool activate);
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static bool writeTextPacket(byte *b, int nBytes);
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static void setProgTrackSyncMain(bool on); // when true, prog track becomes driveable
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static void setProgTrackBoost(bool on); // when true, special prog track current limit does not apply
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// ACKable progtrack calls bitresults callback 0,0 or -1, cv returns value or -1
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static void readCV(int16_t cv, ACK_CALLBACK callback);
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static void readCVBit(int16_t cv, byte bitNum, ACK_CALLBACK callback); // -1 for error
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static void writeCVByte(int16_t cv, byte byteValue, ACK_CALLBACK callback);
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static void writeCVBit(int16_t cv, byte bitNum, bool bitValue, ACK_CALLBACK callback);
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static void verifyCVByte(int16_t cv, byte byteValue, ACK_CALLBACK callback);
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static void verifyCVBit(int16_t cv, byte bitNum, bool bitValue, ACK_CALLBACK callback);
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static void getLocoId(ACK_CALLBACK callback);
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static void setLocoId(int id,ACK_CALLBACK callback);
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// Enhanced API functions
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static void forgetLoco(int cab); // removes any speed reminders for this loco
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static void forgetAllLocos(); // removes all speed reminders
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static void displayCabList(Print *stream);
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static FSH *getMotorShieldName();
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static inline void setGlobalSpeedsteps(byte s) {
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globalSpeedsteps = s;
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};
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static inline int16_t setAckRetry(byte retry) {
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ackRetry = retry;
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ackRetryPSum = ackRetrySum;
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ackRetrySum = 0; // reset running total
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return ackRetryPSum;
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};
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private:
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struct LOCO
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{
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int loco;
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byte speedCode;
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byte groupFlags;
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unsigned long functions;
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};
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static byte joinRelay;
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static byte loopStatus;
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static void setThrottle2(uint16_t cab, uint8_t speedCode);
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static void updateLocoReminder(int loco, byte speedCode);
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static void setFunctionInternal(int cab, byte fByte, byte eByte);
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static bool issueReminder(int reg);
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static int nextLoco;
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static FSH *shieldName;
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static byte globalSpeedsteps;
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static LOCO speedTable[MAX_LOCOS];
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static byte cv1(byte opcode, int cv);
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static byte cv2(int cv);
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static int lookupSpeedTable(int locoId);
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static void issueReminders();
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static void callback(int value);
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// ACK MANAGER
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static ackOp const *ackManagerProg;
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static ackOp const *ackManagerProgStart;
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static byte ackManagerByte;
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static byte ackManagerByteVerify;
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static byte ackManagerBitNum;
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static int ackManagerCv;
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static byte ackManagerRetry;
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static byte ackRetry;
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static int16_t ackRetrySum;
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static int16_t ackRetryPSum;
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static int ackManagerWord;
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static byte ackManagerStash;
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static bool ackReceived;
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static bool ackManagerRejoin;
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static ACK_CALLBACK ackManagerCallback;
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static CALLBACK_STATE callbackState;
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static void ackManagerSetup(int cv, byte bitNumOrbyteValue, ackOp const program[], ACK_CALLBACK callback);
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static void ackManagerSetup(int wordval, ackOp const program[], ACK_CALLBACK callback);
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static void ackManagerLoop();
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static bool checkResets( uint8_t numResets);
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static const int PROG_REPEATS = 8; // repeats of programming commands (some decoders need at least 8 to be reliable)
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// NMRA codes #
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static const byte SET_SPEED = 0x3f;
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static const byte WRITE_BYTE_MAIN = 0xEC;
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static const byte WRITE_BIT_MAIN = 0xE8;
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static const byte WRITE_BYTE = 0x7C;
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static const byte VERIFY_BYTE = 0x74;
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static const byte BIT_MANIPULATE = 0x78;
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static const byte WRITE_BIT = 0xF0;
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static const byte VERIFY_BIT = 0xE0;
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static const byte BIT_ON = 0x08;
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static const byte BIT_OFF = 0x00;
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};
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#ifdef ARDUINO_AVR_MEGA // is using Mega 1280, define as Mega 2560 (pinouts and functionality are identical)
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#define ARDUINO_AVR_MEGA2560
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#endif
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#if defined(ARDUINO_AVR_UNO)
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#define ARDUINO_TYPE "UNO"
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#elif defined(ARDUINO_AVR_NANO)
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#define ARDUINO_TYPE "NANO"
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#elif defined(ARDUINO_AVR_MEGA2560)
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#define ARDUINO_TYPE "MEGA"
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#elif defined(ARDUINO_ARCH_MEGAAVR)
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#define ARDUINO_TYPE "MEGAAVR"
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#elif defined(ARDUINO_TEENSY32)
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#define ARDUINO_TYPE "TEENSY32"
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#elif defined(ARDUINO_TEENSY35)
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#define ARDUINO_TYPE "TEENSY35"
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#elif defined(ARDUINO_TEENSY36)
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#define ARDUINO_TYPE "TEENSY36"
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#elif defined(ARDUINO_TEENSY40)
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#define ARDUINO_TYPE "TEENSY40"
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#elif defined(ARDUINO_TEENSY41)
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#define ARDUINO_TYPE "TEENSY41"
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#else
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#error CANNOT COMPILE - DCC++ EX ONLY WORKS WITH AN ARDUINO UNO, NANO 328, OR ARDUINO MEGA 1280/2560
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#endif
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#endif
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