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LocoNet.cpp
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/****************************************************************************
* Copyright (C) 2009..2013 Alex Shepherd
* Copyright (C) 2020 Damian Philipp
*
* Portions Copyright (C) Digitrax Inc.
* Portions Copyright (C) Uhlenbrock Elektronik GmbH
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*****************************************************************************
*
* IMPORTANT:
*
* Some of the message formats used in this code are Copyright Digitrax, Inc.
* and are used with permission as part of the MRRwA (previously EmbeddedLocoNet) project.
* That permission does not extend to uses in other software products. If you wish
* to use this code, algorithm or these message formats outside of
* MRRwA, please contact Digitrax Inc, for specific permission.
*
* Note: The sale any LocoNet device hardware (including bare PCB's) that
* uses this or any other LocoNet software, requires testing and certification
* by Digitrax Inc. and will be subject to a licensing agreement.
*
* Please contact Digitrax Inc. for details.
*
*****************************************************************************
*
* IMPORTANT:
*
* Some of the message formats used in this code are Copyright Uhlenbrock Elektronik GmbH
* and are used with permission as part of the MRRwA (previously EmbeddedLocoNet) project.
* That permission does not extend to uses in other software products. If you wish
* to use this code, algorithm or these message formats outside of
* MRRwA, please contact Copyright Uhlenbrock Elektronik GmbH, for specific permission.
*
*****************************************************************************
* DESCRIPTION
* This module provides functions that manage the sending and receiving of LocoNet packets.
*
* As bytes are received from the LocoNet, they are stored in a circular
* buffer and after a valid packet has been received it can be read out.
*
* When packets are sent successfully, they are also appended to the Receive
* circular buffer so they can be handled like they had been received from
* another device.
*
* Statistics are maintained for both the send and receiving of packets.
*
* Any invalid packets that are received are discarded and the stats are
* updated approproately.
*
*****************************************************************************/
// Uncomment to enable SV Processing Debug Print statements
// #define DEBUG_SV
#include "LocoNet.h"
#include "ln_sw_uart.h"
#include "ln_config.h"
#include "utils.h"
#if !defined(LOCONET_NO_EEPROM)
#if defined(ESP8266)
# include <EEPROM.h>
# define E2END 0x1FF // Simulate 512 byte EEPROM
uint8_t eeprom_read_byte(const uint8_t* offset) {
return EEPROM.read((int)offset);
}
void eeprom_write_byte(const uint8_t* offset, uint8_t value) {
EEPROM.write((int)offset, value);
}
#elif defined(STM32F1)
# include <FreeRTOS.h>
# include <task.h>
# include <libopencm3/stm32/gpio.h>
# include <cstdint>
#else
# include <avr/eeprom.h>
# include <avr/wdt.h>
#endif
#endif //LOCONET_NO_EEPROM
const char* LoconetStatusStrings[] = {
"CD Backoff",
"Prio Backoff",
"Network Busy",
"Done",
"Collision",
"Unknown Error",
"Retry Error"
};
LocoNetClass::LocoNetClass()
{
}
void LocoNetClass::init(void)
{
#ifdef ESP8266
init(D7); // By default use pin D7 as the Tx pin to be compatible with the previous library default
#else
init(6); // By default use pin 6 as the Tx pin to be compatible with the previous library default
#endif
}
const char* LocoNetClass::getStatusStr(LN_STATUS Status)
{
if ((Status >= LN_CD_BACKOFF) && (Status <= LN_RETRY_ERROR))
return LoconetStatusStrings[Status];
return "Invalid Status";
}
void LocoNetClass::init(uint8_t txPin)
{
initLnBuf(&LnBuffer);
#if !defined(LOCONET_NO_SW_UART)
setTxPin(txPin);
initLocoNetHardware(&LnBuffer);
#endif
#if defined(ESP8266) && !defined(LOCONET_NO_EEPROM)
// Setup EEProm emulation on EPS8266
EEPROM.begin(E2END);
#endif
}
// another way to init LocoNetClass, in case you don't use the embedded UART communication
// this can help e.g. on Platforms like ESP32 to use a Bluetooth Serial port or a socket communication
#if !defined(LOCONET_NO_SW_UART)
void LocoNetClass::setTxPin(uint8_t txPin)
{
//#if defined(STM32F1) && !defined(__ARDUINO__)
{
// uint16_t bitNum = 15;
// gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, (1 << bitNum)); // LN TX
// LnPortRegisterType out = GPIOB; // TODO: This shold be configurable..
}
//#else
pinMode(txPin, OUTPUT);
#if defined(STM32F1) || defined(__AVR__)
// Not figure out which Port bit is the Tx Bit from the Arduino pin number
LnPortRegisterType bitMask = digitalPinToBitMask(txPin);
LnPortRegisterType bitMaskTest = 0x01;
LnPortRegisterType bitNum = 0;
LnPortRegisterType port = digitalPinToPort(txPin);
LnPortAddrType out = portOutputRegister(port);
while (bitMask != bitMaskTest)
bitMaskTest = 1 << ++bitNum;
setTxPortAndPin(out, bitNum);
#elif defined(ESP8266)
setTxPortAndPin(nullptr, txPin);
#endif
}
#endif
// Check to see if any messages is ready to receive()?
bool LocoNetClass::available(void)
{
return lnPacketReady(&LnBuffer);
}
// Check the size in bytes of waiting message
uint8_t LocoNetClass::length(void)
{
if (lnPacketReady(&LnBuffer))
{
lnMsg* m = (lnMsg*)&(LnBuffer.Buf[LnBuffer.ReadIndex]);
return getLnMsgSize(m);
}
else
return 0;
}
lnMsg* LocoNetClass::receive(void)
{
return recvLnMsg(&LnBuffer);
}
// may be called to forwared data from an external communication channel, e.g. ESP32 bluetooth serial or socket
void LocoNetClass::addToBuffer(uint8_t newByte)
{
addByteLnBuf(&LnBuffer, newByte);
}
/*
Send a LocoNet message, using the default priority delay.
When an attempt to send fails, this method will continue to try to re-send
the message until it is successfully sent or until the maximum retry
limit is reached.
Return value is one of:
LN_DONE - Indicates successful send of the message
LN_RETRY_ERROR - Could not successfully send the message within
LN_TX_RETRIES_MAX attempts
LN_UNKNOWN - Indicates an abnormal exit condition for the send attempt.
In this case, it is recommended to make another send
attempt.
*/
LN_STATUS LocoNetClass::send(lnMsg* pPacket)
{
return send(pPacket, LN_BACKOFF_INITIAL);
}
/*
Send a LocoNet message, using an argument for the priority delay.
When an attempt to send fails, this method will continue to try to re-send
the message until it is successfully sent or until the maximum retry
limit is reached.
Return value is one of:
LN_DONE - Indicates successful send of the message
LN_RETRY_ERROR - Could not successfully send the message within
LN_TX_RETRIES_MAX attempts
LN_UNKNOWN - Indicates an abnormal exit condition for the send attempt.
In this case, it is recommended to make another send
attempt.
*/
LN_STATUS LocoNetClass::send(lnMsg* pPacket, uint8_t ucPrioDelay)
{
unsigned char ucTry;
LN_STATUS enReturn;
unsigned char ucWaitForEnterBackoff;
for (ucTry = 0; ucTry < LN_TX_RETRIES_MAX; ucTry++)
{
// wait previous traffic and than prio delay and than try tx
ucWaitForEnterBackoff = 1; // don't want to abort do/while loop before
do // we did not see the backoff state once
{
enReturn = sendLocoNetPacketTry(pPacket, ucPrioDelay);
if (enReturn == LN_DONE) // success?
return LN_DONE;
if (enReturn == LN_PRIO_BACKOFF)
ucWaitForEnterBackoff = 0; // now entered backoff -> next state != LN_BACKOFF is worth incrementing the try counter
} while ((enReturn == LN_CD_BACKOFF) || // waiting CD backoff
(enReturn == LN_PRIO_BACKOFF) || // waiting master+prio backoff
((enReturn == LN_NETWORK_BUSY) && ucWaitForEnterBackoff)); // or within any traffic unfinished
// failed -> next try going to higher prio = smaller prio delay
if (ucPrioDelay > LN_BACKOFF_MIN)
ucPrioDelay--;
}
LnBuffer.Stats.TxErrors++;
return LN_RETRY_ERROR;
}
/*
Create a four-byte LocoNet message from the three method parameters plus a
computed checksum, and send that message to LocoNet using a default priority
delay.
When an attempt to send fails, this method will continue to try to re-send
the message until it is successfully sent or until the maximum retry
limit is reached.
Return value is one of:
LN_DONE - Indicates successful send of the message
LN_RETRY_ERROR - Could not successfully send the message within
LN_TX_RETRIES_MAX attempts
LN_UNKNOWN - Indicates an abnormal exit condition for the send attempt.
In this case, it is recommended to make another send
attempt.
*/
LN_STATUS LocoNetClass::send(uint8_t OpCode, uint8_t Data1, uint8_t Data2)
{
lnMsg SendPacket;
SendPacket.data[0] = OpCode;
SendPacket.data[1] = Data1;
SendPacket.data[2] = Data2;
return send(&SendPacket);
}
/*
Create a four-byte LocoNet message from the three method parameters plus a
computed checksum, and send that message to LocoNet using a parameter for the
priority delay.
This method will make exactly one attempt to send the LocoNet message which
may or may not succeed. Code which uses this method must check the return
status value to determine if the send should be re-tried. Such code must also
implement a retry limit counter.
Return value is one of:
LN_DONE - Indicates successful send of the message.
LN_CD_BACKOFF - Indicates that the message cannot be sent at this time
because the LocoNet state machine is in the "Carrier Detect
Backoff" phase. This should not count against the "retry"
count.
LN_PRIO_BACKOFF - Indicates that the message cannot be sent at this time
because the LocoNet state machine is in the "Priority
Backoff" phase. This should not count against the "retry"
count.
LN_NETWORK_BUSY - Indicates that the message cannot be sent at this time
because some other LocoNet agent is currently sending
a message. This should not count against the "retry"
count.
LN_COLLISSION - Indicates that an attempt was made to send the message
but that the message was corrupted by some other LocoNet
agent's LocoNe traffic. The retry counter should be
decremented and another send should be attempted if the
retry limit has not been reached.
LN_UNKNOWN - Indicates an abnormal exit condition for the send attempt.
In this case, it is recommended to decrement the retry
counter and make another send attempt if the retry limit
has not been reached.
*/
LN_STATUS LocoNetClass::send(uint8_t OpCode, uint8_t Data1, uint8_t Data2, uint8_t PrioDelay)
{
lnMsg SendPacket;
SendPacket.data[0] = OpCode;
SendPacket.data[1] = Data1;
SendPacket.data[2] = Data2;
return sendLocoNetPacketTry(&SendPacket, PrioDelay);
}
/* send a LONG_ACK (LACK) message to Loconet as a response to an OPC_PEER_XFER
message, using the method parameter as the error code in the LONG_ACK message.
When an attempt to send fails, this method will continue to try to re-send
the message until it is successfully sent or until the maximum retry
limit is reached.
Return value is one of:
LN_DONE - Indicates successful send of the message.
LN_RETRY_ERROR - Indicates that the method could not successfully send the
message within LN_TX_RETRIES_MAX attempts.
LN_UNKNOWN - Indicates an abnormal exit condition for the send attempt.
In this case, it is recommended to make another send
attempt.
*/
LN_STATUS LocoNetClass::sendLongAck(uint8_t ucCode)
{
lnMsg SendPacket;
SendPacket.data[0] = OPC_LONG_ACK;
SendPacket.data[1] = OPC_PEER_XFER - 0x80;
SendPacket.data[2] = ucCode;
return send(&SendPacket);
}
LnBufStats* LocoNetClass::getStats(void)
{
return &LnBuffer.Stats;
}
LN_STATUS LocoNetClass::reportPower(uint8_t State)
{
lnMsg SendPacket;
if (State)
SendPacket.data[0] = OPC_GPON;
else
SendPacket.data[0] = OPC_GPOFF;
return send(&SendPacket);
}
uint8_t LocoNetClass::processSwitchSensorMessage(lnMsg* LnPacket)
{
uint16_t Address;
uint8_t Direction;
uint8_t Output;
uint8_t ConsumedFlag = 1;
Address = (LnPacket->srq.sw1 | ((LnPacket->srq.sw2 & 0x0F) << 7));
if (LnPacket->sr.command != OPC_INPUT_REP)
Address++;
switch (LnPacket->sr.command)
{
case OPC_INPUT_REP:
Address <<= 1;
Address += (LnPacket->ir.in2 & OPC_INPUT_REP_SW) ? 2 : 1;
if (notifySensor)
notifySensor(Address, LnPacket->ir.in2 & OPC_INPUT_REP_HI);
break;
case OPC_GPON:
if (notifyPower)
notifyPower(1);
break;
case OPC_GPOFF:
if (notifyPower)
notifyPower(0);
break;
case OPC_SW_REQ:
if (notifySwitchRequest)
notifySwitchRequest(Address, LnPacket->srq.sw2 & OPC_SW_REQ_OUT, LnPacket->srq.sw2 & OPC_SW_REQ_DIR);
break;
case OPC_SW_REP:
if (LnPacket->srp.sn2 & OPC_SW_REP_INPUTS)
{
if (notifySwitchReport)
notifySwitchReport(Address, LnPacket->srp.sn2 & OPC_SW_REP_HI, LnPacket->srp.sn2 & OPC_SW_REP_SW);
}
else
{
if (notifySwitchOutputsReport)
notifySwitchOutputsReport(Address, LnPacket->srp.sn2 & OPC_SW_REP_CLOSED, LnPacket->srp.sn2 & OPC_SW_REP_THROWN);
}
break;
case OPC_SW_STATE:
Direction = LnPacket->srq.sw2 & OPC_SW_REQ_DIR;
Output = LnPacket->srq.sw2 & OPC_SW_REQ_OUT;
if (notifySwitchState)
notifySwitchState(Address, Output, Direction);
break;
case OPC_SW_ACK:
break;
case OPC_MULTI_SENSE:
switch (LnPacket->data[1] & OPC_MULTI_SENSE_MSG)
{
case OPC_MULTI_SENSE_DEVICE_INFO:
// This is a PM42 power event.
/* Working on porting this */
if (notifyMultiSensePower)
{
uint8_t pCMD;
pCMD = (LnPacket->msdi.arg3 & 0xF0);
if ((pCMD == 0x30) || (pCMD == 0x10))
{
// Autoreverse & Circuitbreaker
uint8_t cm1 = LnPacket->msdi.arg3;
uint8_t cm2 = LnPacket->msdi.arg4;
uint8_t Mode; // 0 = AutoReversing 1 = CircuitBreaker
uint8_t boardID = ((LnPacket->msdi.arg2 + 1) + ((LnPacket->msdi.arg1 & 0x1) == 1) ? 128 : 0);
// Report 4 Sub-Districts for a PM4x
uint8_t d = 1;
for (uint8_t i = 1; i < 5; i++)
{
if ((cm1 & d) != 0)
{
Mode = 0;
}
else {
Mode = 1;
}
Direction = cm2 & d;
d = d * 2;
notifyMultiSensePower(boardID, i, Mode, Direction); // BoardID, Subdistrict, Mode, Direction
}
}
else if (pCMD == 0x70) {
// Programming
}
else if (pCMD == 0x00) {
// Device type report
}
}
break;
case OPC_MULTI_SENSE_ABSENT:
case OPC_MULTI_SENSE_PRESENT:
// Transponding Event
if (notifyMultiSenseTransponder)
{
uint16_t Locoaddr;
uint8_t Present;
char Zone;
Address = LnPacket->mstr.zone + ((LnPacket->mstr.type & 0x1F) << 7);
Present = (LnPacket->mstr.type & 0x20) != 0 ? true : false;
Address++;
if (LnPacket->mstr.adr1 == 0x7D)
Locoaddr = LnPacket->mstr.adr2;
else
Locoaddr = (LnPacket->mstr.adr1 * 128) + LnPacket->mstr.adr2;
if ((LnPacket->mstr.zone & 0x0F) == 0x00) Zone = 'A';
else if ((LnPacket->mstr.zone & 0x0F) == 0x02) Zone = 'B';
else if ((LnPacket->mstr.zone & 0x0F) == 0x04) Zone = 'C';
else if ((LnPacket->mstr.zone & 0x0F) == 0x06) Zone = 'D';
else if ((LnPacket->mstr.zone & 0x0F) == 0x08) Zone = 'E';
else if ((LnPacket->mstr.zone & 0x0F) == 0x0A) Zone = 'F';
else if ((LnPacket->mstr.zone & 0x0F) == 0x0C) Zone = 'G';
else if ((LnPacket->mstr.zone & 0x0F) == 0x0E) Zone = 'H';
else Zone = LnPacket->mstr.zone & 0x0F;
notifyMultiSenseTransponder(Address, Zone, Locoaddr, Present);
break;
}
}
break;
case OPC_LONG_ACK:
if (LnPacket->lack.opcode == (OPC_SW_STATE & 0x7F))
{
Direction = LnPacket->lack.ack1 & 0x01;
if (notifyLongAck)
notifyLongAck(LnPacket->data[1], LnPacket->data[2]);
}
else
ConsumedFlag = 0;
break;
default:
ConsumedFlag = 0;
}
return ConsumedFlag;
}
LN_STATUS LocoNetClass::requestSwitch(uint16_t Address, uint8_t Output, uint8_t Direction)
{
uint8_t AddrH = (--Address >> 7) & 0x0F;
uint8_t AddrL = Address & 0x7F;
if (Output)
AddrH |= OPC_SW_REQ_OUT;
if (Direction)
AddrH |= OPC_SW_REQ_DIR;
return send(OPC_SW_REQ, AddrL, AddrH);
}
LN_STATUS LocoNetClass::reportSwitch(uint16_t Address)
{
Address -= 1;
return send(OPC_SW_STATE, (Address & 0x7F), ((Address >> 7) & 0x0F));
}
LN_STATUS LocoNetClass::reportSensor(uint16_t Address, uint8_t State)
{
uint8_t AddrH = ((--Address >> 8) & 0x0F) | OPC_INPUT_REP_CB;
uint8_t AddrL = (Address >> 1) & 0x7F;
if (Address % 2)
AddrH |= OPC_INPUT_REP_SW;
if (State)
AddrH |= OPC_INPUT_REP_HI;
return send(OPC_INPUT_REP, AddrL, AddrH);
}
LocoNetClass LocoNet = LocoNetClass();
// LocoNet Throttle Support
// To make it easier to handle the Speed steps 0 = Stop, 1 = Em Stop and 2 -127
// normal speed steps we will swap speed steps 0 and 1 so that the normal
// range for speed steps is Stop = 1 2-127 is normal as before and now 0 = EmStop
static uint8_t SwapSpeedZeroAndEmStop(uint8_t Speed)
{
if (Speed == 0)
return 1;
if (Speed == 1)
return 0;
return Speed;
}
void LocoNetThrottleClass::updateAddress(uint16_t Address, uint8_t ForceNotify)
{
if (ForceNotify || myAddress != Address)
{
myAddress = Address;
if (notifyThrottleAddress)
notifyThrottleAddress(myUserData, myState, Address, mySlot);
}
}
void LocoNetThrottleClass::updateSpeed(uint8_t Speed, uint8_t ForceNotify)
{
if (ForceNotify || mySpeed != Speed)
{
mySpeed = Speed;
if (notifyThrottleSpeed)
notifyThrottleSpeed(myUserData, myState, SwapSpeedZeroAndEmStop(Speed));
}
}
void LocoNetThrottleClass::updateState(TH_STATE State, uint8_t ForceNotify)
{
TH_STATE PrevState;
if (ForceNotify || myState != State)
{
PrevState = myState;
myState = State;
if (notifyThrottleState)
notifyThrottleState(myUserData, PrevState, State);
}
}
void LocoNetThrottleClass::updateStatus1(uint8_t Status, uint8_t ForceNotify)
{
register uint8_t Mask; // Temporary uint8_t Variable for bitwise AND to force
// the compiler to only do 8 bit operations not 16
if (ForceNotify || myStatus1 != Status)
{
myStatus1 = Status;
if (notifyThrottleSlotStatus)
notifyThrottleSlotStatus(myUserData, Status);
Mask = LOCO_IN_USE;
updateState(((Status & Mask) == Mask) ? TH_ST_IN_USE : TH_ST_FREE, ForceNotify);
}
}
void LocoNetThrottleClass::updateDirectionAndFunctions(uint8_t DirFunc0to4, uint8_t ForceNotify)
{
uint8_t Diffs;
uint8_t Function;
uint8_t Mask;
if (ForceNotify || myDirFunc0to4 != DirFunc0to4)
{
Diffs = myDirFunc0to4 ^ DirFunc0to4;
myDirFunc0to4 = DirFunc0to4;
// Check Functions 1-4
for (Function = 1, Mask = 1; Function <= 4; Function++)
{
if (notifyThrottleFunction && (ForceNotify || Diffs & Mask))
notifyThrottleFunction(myUserData, Function, DirFunc0to4 & Mask);
Mask <<= 1;
}
// Check Functions 0
if (notifyThrottleFunction && (ForceNotify || Diffs & DIRF_F0))
notifyThrottleFunction(myUserData, 0, DirFunc0to4 & (uint8_t)DIRF_F0);
// Check Direction
if (notifyThrottleDirection && (ForceNotify || Diffs & DIRF_DIR))
notifyThrottleDirection(myUserData, myState, DirFunc0to4 & (uint8_t)DIRF_DIR);
}
}
void LocoNetThrottleClass::updateFunctions5to8(uint8_t Func5to8, uint8_t ForceNotify)
{
uint8_t Diffs;
uint8_t Function;
uint8_t Mask;
if (ForceNotify || myFunc5to8 != Func5to8)
{
Diffs = myFunc5to8 ^ Func5to8;
myFunc5to8 = Func5to8;
// Check Functions 5-8
for (Function = 5, Mask = 1; Function <= 8; Function++)
{
if (notifyThrottleFunction && (ForceNotify || Diffs & Mask))
notifyThrottleFunction(myUserData, Function, Func5to8 & Mask);
Mask <<= 1;
}
}
}
void LocoNetThrottleClass::updateSpeedSteps(TH_SPEED_STEPS SpeedSteps, uint8_t ForceNotify)
{
if (ForceNotify || ((myStatus1 & 0x07) != SpeedSteps))
{
myStatus1 = (myStatus1 & 0xF8) | SpeedSteps;
if (notifyThrottleSpeedSteps)
notifyThrottleSpeedSteps(myUserData, SpeedSteps);
}
}
#define SLOT_REFRESH_TICKS 600 // 600 * 100ms = 60 seconds between speed refresh
void LocoNetThrottleClass::process100msActions(void)
{
if (myState == TH_ST_IN_USE)
{
myTicksSinceLastAction++;
if ((myDeferredSpeed) || (myTicksSinceLastAction > SLOT_REFRESH_TICKS))
{
LocoNet.send(OPC_LOCO_SPD, mySlot, (myDeferredSpeed) ? myDeferredSpeed : mySpeed);
if (myDeferredSpeed)
myDeferredSpeed = 0;
myTicksSinceLastAction = 0;
}
}
}
void LocoNetThrottleClass::init(uint8_t UserData, uint8_t Options, uint16_t ThrottleId)
{
myState = TH_ST_FREE;
myThrottleId = ThrottleId;
myDeferredSpeed = 0;
myUserData = UserData;
myOptions = Options;
}
void LocoNetThrottleClass::processMessage(lnMsg* LnPacket)
{
uint8_t Data2;
uint16_t SlotAddress;
// Update our copy of slot information if applicable
if (LnPacket->sd.command == OPC_SL_RD_DATA)
{
SlotAddress = (uint16_t)((LnPacket->sd.adr2 << 7) + LnPacket->sd.adr);
if (mySlot == LnPacket->sd.slot)
{
// Make sure that the slot address matches even though we have the right slot number
// as it is possible that another throttle got in before us and took our slot.
if (myAddress == SlotAddress)
{
if ((myState == TH_ST_SLOT_RESUME) && (myThrottleId != (uint16_t)((LnPacket->sd.id2 << 7) + LnPacket->sd.id1)))
{
updateState(TH_ST_FREE, 1);
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_NO_LOCO);
}
else
{
updateState(TH_ST_IN_USE, 1);
updateAddress(SlotAddress, 1);
updateSpeed(LnPacket->sd.spd, 1);
updateDirectionAndFunctions(LnPacket->sd.dirf, 1);
updateFunctions5to8(LnPacket->sd.snd, 1);
updateSpeedSteps(mySpeedSteps, 1);
// We need to force a State update to cause a display refresh once all data is known
updateState(TH_ST_IN_USE, 1);
// Now Write our own Speed Steps and Throttle Id to the slot and write it back to the command station
LnPacket->sd.command = OPC_WR_SL_DATA;
LnPacket->sd.stat = (LnPacket->sd.stat & 0xf8) | mySpeedSteps;
updateStatus1(LnPacket->sd.stat, 1);
LnPacket->sd.id1 = (uint8_t)(myThrottleId & 0x7F);
LnPacket->sd.id2 = (uint8_t)(myThrottleId >> 7);
LocoNet.send(LnPacket);
}
}
// Ok another throttle did a NULL MOVE with the same slot before we did
// so we have to try again
else if (myState == TH_ST_SLOT_MOVE)
{
updateState(TH_ST_SELECT, 1);
LocoNet.send(OPC_LOCO_ADR, (uint8_t)(myAddress >> 7), (uint8_t)(myAddress & 0x7F));
}
}
// Slot data is not for one of our slots so check if we have requested a new addres
else
{
if (myAddress == SlotAddress)
{
if ((myState == TH_ST_SELECT) || (myState == TH_ST_DISPATCH))
{
if ((LnPacket->sd.stat & STAT1_SL_CONUP) == 0 &&
(LnPacket->sd.stat & LOCO_IN_USE) != LOCO_IN_USE)
{
if (myState == TH_ST_SELECT)
{
updateState(TH_ST_SLOT_MOVE, 1);
mySlot = LnPacket->sd.slot;
Data2 = LnPacket->sd.slot;
}
else
{
updateState(TH_ST_FREE, 1);
Data2 = 0;
}
LocoNet.send(OPC_MOVE_SLOTS, LnPacket->sd.slot, Data2);
}
else
{
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_SLOT_IN_USE);
updateState(TH_ST_FREE, 1);
}
}
else if (myState == TH_ST_SLOT_STEAL)
{
// Make Sure the Slot is actually IN_USE already as we are not going to do an SLOT_MOVE etc
if ((LnPacket->sd.stat & STAT1_SL_CONUP) == 0 &&
(LnPacket->sd.stat & LOCO_IN_USE) == LOCO_IN_USE)
{
mySlot = LnPacket->sd.slot;
updateState(TH_ST_IN_USE, 1);
updateAddress(SlotAddress, 1);
updateSpeed(LnPacket->sd.spd, 1);
updateDirectionAndFunctions(LnPacket->sd.dirf, 1);
updateFunctions5to8(LnPacket->sd.snd, 1);
updateStatus1(LnPacket->sd.stat, 1);
// We need to force a State update to cause a display refresh once all data is known
updateState(TH_ST_IN_USE, 1);
}
else
{
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_NO_LOCO);
updateState(TH_ST_FREE, 1);
}
}
else if (myState == TH_ST_SLOT_FORCE_FREE)
{
LocoNet.send(OPC_SLOT_STAT1, LnPacket->sd.slot, (uint8_t)(myStatus1 & ~(STAT1_SL_BUSY | STAT1_SL_ACTIVE)));
mySlot = 0xFF;
updateState(TH_ST_FREE, 1);
}
}
if (myState == TH_ST_ACQUIRE)
{
mySlot = LnPacket->sd.slot;
updateState(TH_ST_IN_USE, 1);
updateAddress(SlotAddress, 1);
updateSpeed(LnPacket->sd.spd, 1);
updateDirectionAndFunctions(LnPacket->sd.dirf, 1);
updateStatus1(LnPacket->sd.stat, 1);
}
}
}
else if (((LnPacket->sd.command >= OPC_LOCO_SPD) && (LnPacket->sd.command <= OPC_LOCO_SND)) ||
(LnPacket->sd.command == OPC_SLOT_STAT1))
{
if (mySlot == LnPacket->ld.slot)
{
if (LnPacket->ld.command == OPC_LOCO_SPD)
updateSpeed(LnPacket->ld.data, 0);
else if (LnPacket->ld.command == OPC_LOCO_DIRF)
updateDirectionAndFunctions(LnPacket->ld.data, 0);
else if (LnPacket->ld.command == OPC_LOCO_SND)
updateFunctions5to8(LnPacket->ld.data, 0);
else if (LnPacket->ld.command == OPC_SLOT_STAT1)
updateStatus1(LnPacket->ld.data, 0);
}
}
else if (LnPacket->lack.command == OPC_LONG_ACK)
{
if ((myState >= TH_ST_ACQUIRE) && (myState <= TH_ST_SLOT_MOVE))
{
if (LnPacket->lack.opcode == (OPC_MOVE_SLOTS & 0x7F))
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_NO_LOCO);
if (LnPacket->lack.opcode == (OPC_LOCO_ADR & 0x7F))
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_NO_SLOTS);
updateState(TH_ST_FREE, 1);
}
}
}
uint16_t LocoNetThrottleClass::getAddress(void)
{
return myAddress;
}
TH_ERROR LocoNetThrottleClass::stealAddress(uint16_t Address)
{
if (myState <= TH_ST_RELEASE)
{
updateAddress(Address, 1);
updateState(TH_ST_SLOT_STEAL, 1);
LocoNet.send(OPC_LOCO_ADR, (uint8_t)(Address >> 7), (uint8_t)(Address & 0x7F));
return TH_ER_OK;
}
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_BUSY);
return TH_ER_BUSY;
}
TH_ERROR LocoNetThrottleClass::setAddress(uint16_t Address)
{
if (myState <= TH_ST_RELEASE)
{
updateAddress(Address, 1);
updateState(TH_ST_SELECT, 1);
LocoNet.send(OPC_LOCO_ADR, (uint8_t)(Address >> 7), (uint8_t)(Address & 0x7F));
return TH_ER_OK;
}
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_BUSY);
return TH_ER_BUSY;
}
TH_ERROR LocoNetThrottleClass::resumeAddress(uint16_t Address, uint8_t LastSlot)
{
if (myState <= TH_ST_RELEASE)
{
mySlot = LastSlot;
updateAddress(Address, 1);
updateState(TH_ST_SLOT_RESUME, 1);
LocoNet.send(OPC_RQ_SL_DATA, LastSlot, 0);
return TH_ER_OK;
}
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_BUSY);
return TH_ER_BUSY;
}
TH_ERROR LocoNetThrottleClass::freeAddressForce(uint16_t Address)
{
if (myState <= TH_ST_RELEASE)
{
updateAddress(Address, 1);
updateState(TH_ST_SLOT_FORCE_FREE, 1);
LocoNet.send(OPC_LOCO_ADR, (uint8_t)(Address >> 7), (uint8_t)(Address & 0x7F));
return TH_ER_OK;
}
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_BUSY);
return TH_ER_BUSY;
}
TH_ERROR LocoNetThrottleClass::dispatchAddress(void)
{
if (myState == TH_ST_IN_USE)
{
updateState(TH_ST_FREE, 1);
LocoNet.send(OPC_MOVE_SLOTS, mySlot, 0);
return TH_ER_OK;
}
if (notifyThrottleError)
notifyThrottleError(myUserData, TH_ER_NOT_SELECTED);
return TH_ER_NOT_SELECTED;
}
TH_ERROR LocoNetThrottleClass::dispatchAddress(uint16_t Address)
{
if (myState <= TH_ST_RELEASE)
{
updateAddress(Address, 1);
updateState(TH_ST_DISPATCH, 1);
LocoNet.send(OPC_LOCO_ADR, (uint8_t)(Address >> 7), (uint8_t)(Address & 0x7F));