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CommandStation-EX/DCC.h

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/*
* © 2020, Chris Harlow. All rights reserved.
*
* This file is part of Asbelos DCC API
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* It is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef DCC_h
#define DCC_h
#include <Arduino.h>
#include "MotorDriver.h"
#include "MotorDrivers.h"
#include "FSH.h"
typedef void (*ACK_CALLBACK)(int16_t result);
enum ackOp : byte
{ // Program opcodes for the ack Manager
BASELINE, // ensure enough resets sent before starting and obtain baseline current
W0,
W1, // issue write bit (0..1) packet
WB, // issue write byte packet
VB, // Issue validate Byte packet
V0, // Issue validate bit=0 packet
V1, // issue validate bit=1 packlet
WACK, // wait for ack (or absence of ack)
ITC1, // If True Callback(1) (if prevous WACK got an ACK)
ITC0, // If True callback(0);
ITCB, // If True callback(byte)
ITCBV, // If True callback(byte) - end of Verify Byte
ITCB7, // If True callback(byte &0x7F)
NAKFAIL, // if false callback(-1)
FAIL, // callback(-1)
BIV, // Set ackManagerByte to initial value for Verify retry
STARTMERGE, // Clear bit and byte settings ready for merge pass
MERGE, // Merge previous wack response with byte value and decrement bit number (use for readimng CV bytes)
SETBIT, // sets bit number to next prog byte
SETCV, // sets cv number to next prog byte
SETBYTE, // sets current byte to next prog byte
SETBYTEH, // sets current byte to word high byte
SETBYTEL, // sets current byte to word low byte
STASHLOCOID, // keeps current byte value for later
COMBINELOCOID, // combines current value with stashed value and returns it
ITSKIP, // skip to SKIPTARGET if ack true
SKIPTARGET = 0xFF // jump to target
};
enum CALLBACK_STATE : byte {
AFTER_WRITE, // Start callback sequence after something was written to the decoder
WAITING_100, // Waiting for 100mS of stable power
WAITING_30, // waiting to 30ms of power off gap.
READY, // Ready to complete callback
};
// Allocations with memory implications..!
// Base system takes approx 900 bytes + 8 per loco. Turnouts, Sensors etc are dynamically created
#if defined(ARDUINO_AVR_UNO)
const byte MAX_LOCOS = 20;
#elif defined(ARDUINO_AVR_NANO)
const byte MAX_LOCOS = 30;
#else
const byte MAX_LOCOS = 50;
#endif
class DCC
{
public:
static void begin(const FSH * motorShieldName, MotorDriver *mainDriver, MotorDriver *progDriver);
static void setJoinRelayPin(byte joinRelayPin);
static void loop();
// Public DCC API functions
static void setThrottle(uint16_t cab, uint8_t tSpeed, bool tDirection);
static uint8_t getThrottleSpeed(int cab);
static bool getThrottleDirection(int cab);
static void writeCVByteMain(int cab, int cv, byte bValue);
static void writeCVBitMain(int cab, int cv, byte bNum, bool bValue);
static void setFunction(int cab, byte fByte, byte eByte);
static void setFn(int cab, int16_t functionNumber, bool on);
static int changeFn(int cab, int16_t functionNumber, bool pressed);
static int getFn(int cab, int16_t functionNumber);
static void updateGroupflags(byte &flags, int16_t functionNumber);
static void setAccessory(int aAdd, byte aNum, bool activate);
static bool writeTextPacket(byte *b, int nBytes);
static void setProgTrackSyncMain(bool on); // when true, prog track becomes driveable
static void setProgTrackBoost(bool on); // when true, special prog track current limit does not apply
// ACKable progtrack calls bitresults callback 0,0 or -1, cv returns value or -1
static void readCV(int16_t cv, ACK_CALLBACK callback);
static void readCVBit(int16_t cv, byte bitNum, ACK_CALLBACK callback); // -1 for error
static void writeCVByte(int16_t cv, byte byteValue, ACK_CALLBACK callback);
static void writeCVBit(int16_t cv, byte bitNum, bool bitValue, ACK_CALLBACK callback);
static void verifyCVByte(int16_t cv, byte byteValue, ACK_CALLBACK callback);
static void verifyCVBit(int16_t cv, byte bitNum, bool bitValue, ACK_CALLBACK callback);
static void getLocoId(ACK_CALLBACK callback);
static void setLocoId(int id,ACK_CALLBACK callback);
// Enhanced API functions
static void forgetLoco(int cab); // removes any speed reminders for this loco
static void forgetAllLocos(); // removes all speed reminders
static void displayCabList(Print *stream);
static FSH *getMotorShieldName();
static inline void setGlobalSpeedsteps(byte s) {
globalSpeedsteps = s;
};
static inline int16_t setAckRetry(byte retry) {
ackRetry = retry;
ackRetryPSum = ackRetrySum;
ackRetrySum = 0; // reset running total
return ackRetryPSum;
};
private:
struct LOCO
{
int loco;
byte speedCode;
byte groupFlags;
unsigned long functions;
};
static byte joinRelay;
static byte loopStatus;
static void setThrottle2(uint16_t cab, uint8_t speedCode);
static void updateLocoReminder(int loco, byte speedCode);
static void setFunctionInternal(int cab, byte fByte, byte eByte);
static bool issueReminder(int reg);
static int nextLoco;
static FSH *shieldName;
static byte globalSpeedsteps;
static LOCO speedTable[MAX_LOCOS];
static byte cv1(byte opcode, int cv);
static byte cv2(int cv);
static int lookupSpeedTable(int locoId);
static void issueReminders();
static void callback(int value);
// ACK MANAGER
static ackOp const *ackManagerProg;
static ackOp const *ackManagerProgStart;
static byte ackManagerByte;
static byte ackManagerByteVerify;
static byte ackManagerBitNum;
static int ackManagerCv;
static byte ackManagerRetry;
static byte ackRetry;
static int16_t ackRetrySum;
static int16_t ackRetryPSum;
static int ackManagerWord;
static byte ackManagerStash;
static bool ackReceived;
static bool ackManagerRejoin;
static ACK_CALLBACK ackManagerCallback;
static CALLBACK_STATE callbackState;
static void ackManagerSetup(int cv, byte bitNumOrbyteValue, ackOp const program[], ACK_CALLBACK callback);
static void ackManagerSetup(int wordval, ackOp const program[], ACK_CALLBACK callback);
static void ackManagerLoop();
static bool checkResets( uint8_t numResets);
static const int PROG_REPEATS = 8; // repeats of programming commands (some decoders need at least 8 to be reliable)
// NMRA codes #
static const byte SET_SPEED = 0x3f;
static const byte WRITE_BYTE_MAIN = 0xEC;
static const byte WRITE_BIT_MAIN = 0xE8;
static const byte WRITE_BYTE = 0x7C;
static const byte VERIFY_BYTE = 0x74;
static const byte BIT_MANIPULATE = 0x78;
static const byte WRITE_BIT = 0xF0;
static const byte VERIFY_BIT = 0xE0;
static const byte BIT_ON = 0x08;
static const byte BIT_OFF = 0x00;
};
#ifdef ARDUINO_AVR_MEGA // is using Mega 1280, define as Mega 2560 (pinouts and functionality are identical)
#define ARDUINO_AVR_MEGA2560
#endif
#if defined(ARDUINO_AVR_UNO)
#define ARDUINO_TYPE "UNO"
#elif defined(ARDUINO_AVR_NANO)
#define ARDUINO_TYPE "NANO"
#elif defined(ARDUINO_AVR_MEGA2560)
#define ARDUINO_TYPE "MEGA"
#elif defined(ARDUINO_ARCH_MEGAAVR)
#define ARDUINO_TYPE "MEGAAVR"
#elif defined(ARDUINO_TEENSY32)
#define ARDUINO_TYPE "TEENSY32"
#elif defined(ARDUINO_TEENSY35)
#define ARDUINO_TYPE "TEENSY35"
#elif defined(ARDUINO_TEENSY36)
#define ARDUINO_TYPE "TEENSY36"
#elif defined(ARDUINO_TEENSY40)
#define ARDUINO_TYPE "TEENSY40"
#elif defined(ARDUINO_TEENSY41)
#define ARDUINO_TYPE "TEENSY41"
#else
#error CANNOT COMPILE - DCC++ EX ONLY WORKS WITH AN ARDUINO UNO, NANO 328, OR ARDUINO MEGA 1280/2560
#endif
#endif
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