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Diag output over MQTT added

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This commit is contained in:
Gregor Baues 2021-06-03 21:42:14 +02:00
parent e51279b202
commit 9fcc69d273
11 changed files with 268 additions and 388 deletions
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7
DIAG.h
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@ -16,14 +16,15 @@
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef DIAG_h
#define DIAG_h
#include "StringFormatter.h"
#include "StringLogger.h"
#include "DiagLogger.h"
// #define DIAG StringFormatter::diag
#define DIAG StringLogger::get().diag // allows to add other log writers
// #define DIAG StringFormatter::diag // Std logging to serial only
#define DIAG DiagLogger::get().diag // allows to add other log writers
#define LCD StringFormatter::lcd
#endif

63
DiagLogger.cpp Normal file
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@ -0,0 +1,63 @@
/*
* © 2021, Gregor Baues, All rights reserved.
*
* This file is part of DCC-EX/CommandStation-EX
*
* 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/>.
*
*/
#include "DiagLogger.h"
// DIAG.h the #define DIAG points to here ...
// EthernetSetup , Wifisetup, etc can register a function to be called allowing the channel
// to publish the diag info to
// serial is default end enabled all the time
DiagLogger DiagLogger::singleton; // static instantiation;
void DiagLogger::addDiagWriter(DiagWriter l) {
if ( registered == MAXWRITERS ) {
Serial.println("Error: Max amount of writers exceeded.");
return;
}
writers[registered] = l;
registered++;
}
void DiagLogger::diag(const FSH *input,...)
{
va_list args;
va_start(args, input);
int len = 0;
len += sprintf(&b1[len], "<* ");
len += vsprintf_P(&b1[len], (const char *)input, args);
len += sprintf(&b1[len], " *>\n");
if ( len >= 256 ) { Serial.print("ERROR : Diag Buffer overflow"); return; }
// allways print to Serial
Serial.print(b1);
// callback the other registered diag writers
for (size_t i = 0; i < (size_t) registered; i++)
{
writers[i](b1, len);
}
va_end(args);
}

59
DiagLogger.h Normal file
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@ -0,0 +1,59 @@
/*
* © 2021, Gregor Baues, All rights reserved.
*
* This file is part of DCC-EX/CommandStation-EX
*
* 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 DiagLogger_h
#define DiagLogger_h
#include "StringFormatter.h"
#define MAXWRITERS 10
typedef void (*DiagWriter)(const char *msg, const int length);
class DiagLogger
{
private:
// Methods
DiagLogger() = default;
DiagLogger(const DiagLogger &); // non construction-copyable
DiagLogger &operator=(const DiagLogger &); // non copyable
// Members
static DiagLogger singleton; // unique instance of the MQTTInterface object
DiagWriter writers[MAXWRITERS];
int registered = 0; // number of registered writers ( Serial is not counted as always used )
char b1[256];
public:
// Methods
static DiagLogger &get() noexcept
{ // return a reference to the unique instance
return singleton;
}
void diag(const FSH *input...);
void addDiagWriter(DiagWriter l);
~DiagLogger() = default;
// Members
};
#endif

214
MQTTInterface.cpp
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@ -75,14 +75,17 @@ void mqttDiag(const char *msg, const int length)
{
sprintf(topic, "%s/%ld/diag", MQTTInterface::get()->getClientID(), MQTTInterface::get()->getClients()[mqSocket].topic);
}
// Serial.print(" ---- MQTT pub to: "); Serial.print(topic); Serial.print(" Msg: "); Serial.print(msg);
// Serial.print(" ---- MQTT pub to: ");
// Serial.print(topic);
// Serial.print(" Msg: ");
// Serial.print(msg);
MQTTInterface::get()->publish(topic, msg);
}
}
void MQTTInterface::setup()
{
StringLogger::get().addDiagWriter(mqttDiag);
DiagLogger::get().addDiagWriter(mqttDiag);
singleton = new MQTTInterface();
if (!singleton->connected)
@ -108,6 +111,42 @@ MQTTInterface::MQTTInterface()
this->outboundRing = new RingStream(OUT_BOUND_SIZE);
};
/**
* @brief determine the mqsocket from a topic
*
* @return byte the mqsocketid for the message recieved
*/
byte senderMqSocket(MQTTInterface *mqtt, char *topic)
{
// list of all available clients from which we can determine the mqsocket
auto clients = mqtt->getClients();
const char s[2] = "/"; // topic delimiter is /
char *token;
byte mqsocket = 0;
/* get the first token = ClientID */
token = strtok(topic, s);
/* get the second token = topicID */
token = strtok(NULL, s);
if (token != NULL) // topic didn't contain any topicID
{
auto topicid = atoi(token);
// verify that there is a MQTT client with that topic id connected
// check in the array of clients if we have one with the topicid
// start at 1 as 0 is not allocated as mqsocket
for (int i = 1; i <= mqtt->getClientSize(); i++)
{
if (clients[i].topic == topicid)
{
mqsocket = i;
break; // we are done
}
}
// if we get here we have a topic but no associated client
}
// if mqsocket == 0 here we haven't got any Id in the topic string
return mqsocket;
}
/**
* @brief MQTT Interface callback recieving all incomming messages from the PubSubClient
*
@ -115,96 +154,68 @@ MQTTInterface::MQTTInterface()
* @param payload
* @param length
*/
void mqttCallback(char *topic, byte *payload, unsigned int length)
void mqttCallback(char *topic, byte *pld, unsigned int length)
{
// it's a bounced diag message ignore in all cases
// but it should not be necessary here .. that means the active mqsocket is wrong when sending to diag message
if ( (pld[0] == '<') && (pld[1] == '*'))
{
return;
}
// ignore anything above the PAYLOAD limit of 64 char which should be enough
// in general things rejected here is the bounce of the inital messages setting up the chnanel etc
if (length >= MAXPAYLOAD)
{
return;
}
MQTTInterface *mqtt = MQTTInterface::get();
auto clients = mqtt->getClients();
errno = 0;
payload[length] = '\0'; // make sure we have the string terminator in place
if (Diag::MQTT)
DIAG(F("MQTT Callback:[%s] [%s] [%d] on interface [%x]"), topic, (char *)payload, length, mqtt);
switch (payload[0])
{
case '<': // Recieved a DCC-EX Command
{
if (payload[1] == '*') { return;} // it's a bounced diag message
const char s[2] = "/"; // topic delimiter is /
char *token;
byte mqsocket;
csmsg_t tm; // topic message
/* get the first token = ClientID */
token = strtok(topic, s);
/* get the second token = topicID */
token = strtok(NULL, s);
if (token == NULL)
{
DIAG(F("MQTT Can't identify sender #1; command send on wrong topic"));
// FOR DIAGS and MQTT ON in the callback we need to copy the payload buffer
// as during the publish of the diag messages the original payload gets destroyed
// so we setup the csmsg_t now to save yet another buffer
// if tm not used it will just be discarded at the end of the function call
memset(tm.cmd, 0, MAXPAYLOAD); // Clean up the cmd buffer - should not be necessary
strlcpy(tm.cmd, (char *)pld, length + 1); // Message payload
tm.mqsocket = senderMqSocket(mqtt,topic); // On which socket did we recieve the mq message
mqtt->setActive(tm.mqsocket); // connection from where we recieved the command is active now
if (Diag::MQTT) DIAG(F("MQTT Callback:[%s/%d] [%s] [%d] on interface [%x]"), topic, tm.mqsocket, tm.cmd, length, mqtt);
switch (tm.cmd[0])
{
case '<': // Recieved a DCC-EX Command
{
if(!tm.mqsocket) {
DIAG(F("MQTT Can't identify sender; command send on wrong topic"));
return;
// don't do anything as we wont know where to send the results
// normally the topicid shall be valid as we only have subscribed to that one and nothing else
// comes here; The only issue is when recieveing on the open csid channel ( which stays open in order to
// able to accept other connections )
}
else
{
auto topicid = atoi(token);
// verify that there is a MQTT client with that topic id connected
bool isClient = false;
// check in the array of clients if we have one with the topicid
// start at 1 as 0 is not allocated as mqsocket
for (int i = 1; i <= mqtt->getClientSize(); i++)
// for (int i = 1; i <= subscriberid; i++)
{
if (clients[i].topic == topicid)
{
isClient = true;
mqsocket = i;
break;
}
}
if (!isClient)
{
// no such client connected
DIAG(F("MQTT Can't identify sender #2; command send on wrong topic"));
return;
}
}
// if we make it until here we dont even need to test the last "cmd" element from the topic as there is no
// subscription for anything else
// Prepare the DCC-EX command
csmsg_t tm; // topic message
if (length >= MAXPAYLOAD)
{
DIAG(F("MQTT Command too long (> [%d] characters)"), MAXPAYLOAD);
}
memset(tm.cmd, 0, MAXPAYLOAD); // Clean up the cmd buffer - should not be necessary
strlcpy(tm.cmd, (char *)payload, length + 1); // Message payload
tm.mqsocket = mqsocket; // On which socket did we recieve the mq message
int idx = mqtt->getPool()->setItem(tm); // Add the recieved command to the pool
if (idx == -1)
{
DIAG(F("MQTT Command pool full. Could not handle recieved command."));
return;
}
mqtt->getIncomming()->push(idx); // Add the index of the pool item to the incomming queue
// don't show the topic as we would have to save it also just like the payload
if (Diag::MQTT)
DIAG(F("MQTT Message arrived [%s]: [%s]"), topic, tm.cmd);
DIAG(F("MQTT Message arrived: [%s]"), tm.cmd);
break;
}
case 'm': // Recieved an MQTT Connection management message
case 'm': // Recieved an MQTT Connection management message
{
switch (payload[1])
switch (tm.cmd[1])
{
case 'i': // Inital handshake message to create the tunnel
case 'i': // Inital handshake message to create the tunnel
{
char buffer[MAXPAYLOAD];
char *tmp = (char *)payload + 3;
char *tmp = tm.cmd + 3;
strlcpy(buffer, tmp, length);
buffer[length - 4] = '\0';
@ -244,18 +255,14 @@ void mqttCallback(char *topic, byte *payload, unsigned int length)
return;
}
default: // Invalid message
default:
{
// ignore
return;
}
}
}
default: // invalid command / message
{
// this may be the echo comming back on the main channel to which we are also subscribed
// si just ignore for now
// DIAG(F("MQTT Invalid DCC-EX command: %s"), (char *)payload);
default:
{
break;
}
}
@ -302,7 +309,7 @@ void MQTTInterface::setup(const FSH *id, MQTTBroker *b)
DIAG(F("MQTT Client created ok..."));
array_to_string(mac, CLIENTIDSIZE, clientID);
DIAG(F("MQTT Client ID : %s"), clientID);
connect(); // inital connection as well as reconnects
connect(); // inital connection as well as reconnects
}
/**
@ -335,7 +342,7 @@ void MQTTInterface::connect()
if (mqttClient->connect(connectID))
{
DIAG(F("MQTT Broker connected ..."));
auto sub = subscribe(clientID); // set up the main subscription on which we will recieve the intal mi message from a subscriber
auto sub = subscribe(clientID); // set up the main subscription on which we will recieve the intal mi message from a subscriber
if (Diag::MQTT)
DIAG(F("MQTT subscriptons %s..."), sub ? "ok" : "failed");
mqState = CONNECTED;
@ -349,10 +356,10 @@ void MQTTInterface::connect()
}
// with uid passwd
case 2:
{
{
DIAG(F("MQTT Broker connecting with uid/pwd ..."));
char user[strlen_P((const char *) broker->user)];
char pwd[strlen_P((const char *) broker->pwd)];
char user[strlen_P((const char *)broker->user)];
char pwd[strlen_P((const char *)broker->pwd)];
// need to copy from progmem to lacal
strcpy_P(user, (const char *)broker->user);
@ -361,7 +368,7 @@ void MQTTInterface::connect()
if (mqttClient->connect(connectID, user, pwd))
{
DIAG(F("MQTT Broker connected ..."));
auto sub = subscribe(clientID); // set up the main subscription on which we will recieve the intal mi message from a subscriber
auto sub = subscribe(clientID); // set up the main subscription on which we will recieve the intal mi message from a subscriber
if (Diag::MQTT)
DIAG(F("MQTT subscriptons %s..."), sub ? "ok" : "failed");
mqState = CONNECTED;
@ -371,8 +378,8 @@ void MQTTInterface::connect()
DIAG(F("MQTT broker connection failed, rc=%d, trying to reconnect"), mqttClient->state());
reconnectCount++;
}
break;
// ! add last will messages for the client
break;
// ! add last will messages for the client
// (connectID, MQTT_BROKER_USER, MQTT_BROKER_PASSWD, "$connected", 0, true, "0", 0))
}
}
@ -457,6 +464,7 @@ void inLoop(Queue<int> &in, ObjectPool<csmsg_t, MAXPOOLSIZE> &pool, RingStream *
int idx = in.pop();
csmsg_t *c = pool.getItem(idx, &state);
MQTTInterface::get()->setActive(c->mqsocket); // connection from where we recieved the command is active now
// execute the command and collect results
outboundRing->mark((uint8_t)c->mqsocket);
CommandDistributor::parse(c->mqsocket, (byte *)c->cmd, outboundRing);
@ -535,24 +543,23 @@ void checkSubscribers(Queue<int> &sq, csmqttclient_t *clients)
// ignored
// JSON message { init: <number> channels: {result: <string>, diag: <string> }}
char buffer[MAXPAYLOAD*2];
memset(buffer, 0, MAXPAYLOAD*2);
char buffer[MAXPAYLOAD * 2];
memset(buffer, 0, MAXPAYLOAD * 2);
// sprintf(buffer, "mc(%d,%ld)", (int)clients[s].distant, clients[s].topic);
sprintf(buffer, "{ \"init\": %d, \"subscribeto\": {\"result\": \"%s/%ld/result\" , \"diag\": \"%s/%ld/diag\" }, \"publishto\": {\"cmd\": \"%s/%ld/cmd\" } }",
(int)clients[s].distant,
mqtt->getClientID(),
clients[s].topic,
mqtt->getClientID(),
clients[s].topic,
mqtt->getClientID(),
clients[s].topic
);
sprintf(buffer, "{ \"init\": %d, \"subscribeto\": {\"result\": \"%s/%ld/result\" , \"diag\": \"%s/%ld/diag\" }, \"publishto\": {\"cmd\": \"%s/%ld/cmd\" } }",
(int)clients[s].distant,
mqtt->getClientID(),
clients[s].topic,
mqtt->getClientID(),
clients[s].topic,
mqtt->getClientID(),
clients[s].topic);
if (Diag::MQTT)
DIAG(F("MQTT channel setup message: [%s]"), buffer);
mqtt->publish(mqtt->getClientID(), buffer);
// on the cs side all is set and we declare that the cs is open for business
@ -562,15 +569,14 @@ void checkSubscribers(Queue<int> &sq, csmqttclient_t *clients)
void MQTTInterface::loop()
{
if (!singleton)
return;
singleton->loop2();
}
bool showonce = false;
auto s = millis();
void loopPing(int interval)
{
auto c = millis();
@ -581,15 +587,15 @@ void loopPing(int interval)
}
}
void MQTTInterface::loop2()
{
loopPing(2000); // ping every 2 sec
// loopPing(2000); // ping every 2 sec
// Connection impossible so just don't do anything
if (singleton->mqState == CONNECTION_FAILED)
{
if(!showonce) {
if (!showonce)
{
DIAG(F("MQTT connection failed..."));
showonce = true;
}

20
MQTTInterface.h
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@ -41,23 +41,17 @@
#define MAXPAYLOAD 64 // max length of a payload recieved
#define MAXDOMAINLENGTH 32 // domain name length for the broker e.g. test.mosquitto.org
#define MAXTBUF 50 //!< max length of the buffer for building the topic name ;to be checked
#define MAXTMSG 120 //!< max length of the messages for a topic ;to be checked PROGMEM ?
#define MAXTSTR 30 //!< max length of a topic string
#define MAXCONNECTID 40 // broker connection id length incl possible prefixes
#define MAXTBUF 64 //!< max length of the buffer for building the topic name ;to be checked
#define MAXTMSG 64 //!< max length of the messages for a topic ;to be checked PROGMEM ?
#define MAXTSTR 32 //!< max length of a topic string
#define MAXCONNECTID 32 // broker connection id length incl possible prefixes
#define CLIENTIDSIZE 6 // max length of the clientid used for connection to the broker
#define MAXRECONNECT 5 // reconnection tries before final failure
#define MAXMQTTCONNECTIONS 20 // maximum number of unique tpoics available for subscribers
#define OUT_BOUND_SIZE 256 // Size of the RingStream used to provide results from the parser and publish
#define MAX_POOL_SIZE 32 // recieved command store size
#define OUT_BOUND_SIZE 128 // Size of the RingStream used to provide results from the parser and publish
#define MAX_POOL_SIZE 16 // recieved command store size
#define MAX_CALLBACKS 10
// Define Broker configurations; Values are provided in the following order
// MQTT_BROKER_PORT 9883
// MQTT_BROKER_DOMAIN "dcclms.modelrailroad.ovh"
// MQTT_BROKER_ADDRESS 51, 210, 151, 143
// MQTT_BROKER_USER "dcccs"
// MQTT_BROKER_PASSWD "dcccs$3020"
// MQTT_BROKER_CLIENTID_PREFIX "dcc$lms-"
struct MQTTBroker
{
int port;

98
MemStream.cpp
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@ -1,98 +0,0 @@
/*
(c) 2015 Ingo Fischer
buffer serial device
based on Arduino SoftwareSerial
Constructor warning messages fixed by Chris Harlow.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "MemStream.h"
MemStream::MemStream(uint8_t *buffer, const uint16_t len, uint16_t content_len, bool allowWrite)
:_buffer(buffer),_len(len), _buffer_overflow(false), _pos_read(0), _allowWrite(allowWrite)
{
if (content_len==0) memset(_buffer, 0, _len);
_pos_write=(content_len>len)? len: content_len;
}
size_t MemStream::write(uint8_t byte) {
if (! _allowWrite) return -1;
if (_pos_write >= _len) {
_buffer_overflow = true;
return 0;
}
_buffer[_pos_write] = byte;
++_pos_write;
return 1;
}
void MemStream::flush() {
memset(_buffer, 0, _len);
_pos_write = 0;
_pos_read = 0;
}
int MemStream::read() {
if (_pos_read >= _len) {
_buffer_overflow = true;
return -1;
}
if (_pos_read >= _pos_write) {
return -1;
}
return _buffer[_pos_read++];
}
int MemStream::peek() {
if (_pos_read >= _len) {
_buffer_overflow = true;
return -1;
}
if (_pos_read >= _pos_write) {
return -1;
}
return _buffer[_pos_read+1];
}
int MemStream::available() {
int ret=_pos_write-_pos_read;
if (ret<0) ret=0;
return ret;
}
void MemStream::setBufferContent(uint8_t *buffer, uint16_t content_len) {
memset(_buffer, 0, _len);
memcpy(_buffer, buffer, content_len);
_buffer_overflow=false;
_pos_write=content_len;
_pos_read=0;
}
void MemStream::setBufferContentFromProgmem(uint8_t *buffer, uint16_t content_len) {
memset(_buffer, 0, _len);
memcpy_P(_buffer, buffer, content_len);
_buffer_overflow=false;
_pos_write=content_len;
_pos_read=0;
}
void MemStream::setBufferContentPosition(uint16_t read_pos, uint16_t write_pos) {
_pos_write=write_pos;
_pos_read=read_pos;
}

78
MemStream.h
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@ -1,78 +0,0 @@
/*
(c) 2015 Ingo FIscher
buffer serial device
based on Arduino SoftwareSerial
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef MemStream_h
#define MemStream_h
#include <inttypes.h>
#if defined(ARDUINO_ARCH_MEGAAVR)
#include <Arduino.h>
#else
#include <Stream.h>
#endif
#include <avr/pgmspace.h>
class MemStream : public Stream
{
private:
uint8_t *_buffer;
const uint16_t _len;
bool _buffer_overflow;
uint16_t _pos_read;
uint16_t _pos_write;
bool _allowWrite;
public:
// public methods
MemStream(uint8_t *buffer, const uint16_t len, uint16_t content_len = 0, bool allowWrite = true);
~MemStream() {}
operator const uint8_t *() const { return _buffer; }
operator const char *() const { return (const char *)_buffer; }
uint16_t current_length() const { return _pos_write; }
bool listen() { return true; }
void end() {}
bool isListening() { return true; }
bool overflow()
{
bool ret = _buffer_overflow;
_buffer_overflow = false;
return ret;
}
int peek();
virtual size_t write(uint8_t byte);
virtual int read();
virtual int available();
virtual void flush();
void setBufferContent(uint8_t *buffer, uint16_t content_len);
void setBufferContentFromProgmem(uint8_t *buffer, uint16_t content_len);
void setBufferContentPosition(uint16_t read_pos, uint16_t write_pos);
using Print::write;
};
#endif

20
ObjectPool.h
View File

@ -1,3 +1,23 @@
/*
* © 2021, Gregor Baues, All rights reserved.
*
* This file is part of DCC-EX/CommandStation-EX
*
* 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 _ObjectPool_h_
#define _ObjectPool_h_

44
StringLogger.cpp
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@ -1,44 +0,0 @@
#include "StringLogger.h"
// DIAG.h the #define DIAG points to here ...
// EthernetSetup , Wifisetup, etc can register a function to be called allowing the channel
// to publish the diag info to
// serial is default end enabled all the time
StringLogger StringLogger::singleton; // static instantiation;
void StringLogger::addDiagWriter(DiagWriter l) {
if ( registered == MAXWRITERS ) {
Serial.println("Error: Max amount of writers exceeded.");
return;
}
writers[registered] = l;
registered++;
}
void StringLogger::diag(const FSH *input,...)
{
char b1[128];
va_list args;
va_start(args, input);
int len = 0;
len += sprintf(&b1[len], "<* ");
len += vsprintf_P(&b1[len], (const char *)input, args);
len += sprintf(&b1[len], " *>\n");
// allways print to Serial
Serial.print(b1);
// callback the other registered diag writers
for (size_t i = 0; i < (size_t) registered; i++)
{
writers[i](b1, len);
}
va_end(args);
}

45
StringLogger.h
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@ -1,45 +0,0 @@
#ifndef StringLogger_h
#define StringLogger_h
#include "MemStream.h"
#include "RingStream.h"
#include "StringFormatter.h"
#include <stdarg.h>
// stream for diagnostics in addition to serial you should be able to configure
// additional (besides Serial) 'outputs' to e.g. Ethernet or MQTT or WIFI etc ...
// Serial outpout is managed in StringFormatter on top for formatting the message
// which gets printed char by char
#define MAXWRITERS 10
typedef void (*DiagWriter)(const char *msg, const int length);
class StringLogger
{
private:
// Methods
StringLogger() = default;
StringLogger(const StringLogger &); // non construction-copyable
StringLogger &operator=(const StringLogger &); // non copyable
// Members
static StringLogger singleton; // unique instance of the MQTTInterface object
DiagWriter writers[MAXWRITERS];
int registered = 0; // number of registered writers ( Serial is not counted as always used )
public:
// Methods
static StringLogger &get() noexcept
{ // return a reference to the unique instance
return singleton;
}
void diag(const FSH *input...);
void addDiagWriter(DiagWriter l);
~StringLogger() = default;
// Members
};
#endif

8
defines.h
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@ -42,14 +42,16 @@
#if ENABLE_MQTT && (defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560) || defined(ARDUINO_SAMD_ZERO) || defined(TEENSYDUINO))
#if ENABLE_ETHERNET
#error Ethernet and MQTT can not be enabled simultaneaously
#elif ENABLE_WIFI
#error WIFI and MQTT can not be enabled simultaneaously
#else
#define MQTT_ON true
#endif
#endif
// #if WIFI_ON && ETHERNET_ON
// #error Command Station does not support WIFI and ETHERNET at the same time.
// #endif
#if WIFI_ON && ETHERNET_ON
#error Command Station does not support WIFI and ETHERNET at the same time.
#endif
////////////////////////////////////////////////////////////////////////////////
//