Wait for external signal before executing G-Code command

3D_Le

Hello everyone, I'm using the Repetier Firmware on an Arduino Due along with the RADDS Board. However, the Arduino only controls an extruder and not the stepper motors for the respective axes or a heated bed. The Arduino receives a binary signal from the outside via a pin.My goal is to have the extruder execute the next G-code command every time there's a signal change from the outside. Even if it's just a G0 command and it doesn't extrude, it should "execute" the command upon the signal change. While waiting for a new signal, the extruder should maintain temperature and extrusion speed. Ideally the board should not wait for feedback from the extruder (as in the case of the M109 command). It should blindly execute the commands as soon as a signal comes from outside.Where in the code do I write that a new G-code command should be executed upon a new signal? I've been unsuccessful so far.Thanks in advance!

Repetier

Guess you should look in commands.cpp for

Commands::executeGCode

which is the starting function to execute a function regardless from the source. But you must still run periodical actions so maybe better add it e.g. in

Commands::commandLoop()
where it gets called. Search also other occurences where it gets called.

3D_Le

Thanks for the quick answer.

The G-Code im sending via Repetier Host looks like this:

M104 S200 ;Set temperature M109 S200 G28 ;Home all axis or named axis. M82 ;use absolute distance for extrusion G90 ;Use absolute coordinates G92 E0 ;zero the extruded lengt G1 F500 E0 G1 E10 G1 E15 G0 E20

Currently my CommandLoop ist looking like the code below, i didnt change the commandloop, i just added my parts.
Im sending signals at 10-second intervals to the Arduino, but the Extruder doesnt do anything.
(The Configuration.h and the pins.h are all set up). I also dont get any feedback from the Repetier Host.

<div>bool lastTriggerState = false; //im AS Code mit einem Signal 1 anfangen</div><div>bool TriggerState = false;</div>
<div>void Commands::commandLoop() {</div>
<div> TriggerState = digitalRead(28);</div><div> delay (5);</div>
<div> // while(true) {</div><div>#ifdef DEBUG_PRINT</div><div> debugWaitLoop = 1;</div><div>#endif</div><div> Printer::breakLongCommand = false; // block is now finished</div><div> if (!Printer::isBlockingReceive()) {</div><div>#if SDSUPPORT</div><div> if (sd.sdmode == 20) {</div><div> if (PrintLine::linesCount == 0) {</div><div> sd.pausePrintPart2();</div><div> }</div><div> }</div><div> if (sd.sdmode == 21) {</div><div> if (PrintLine::linesCount == 0) {</div><div> sd.stopPrintPart2();</div><div> }</div><div> }</div><div>#endif</div><div> GCode::readFromSerial();</div><div> GCode* code = GCode::peekCurrentCommand();</div><div> // UI_SLOW; // do longer timed user interface action</div><div> UI_MEDIUM; // do check encoder</div><div> if (code) {</div><div>#if SDSUPPORT</div><div> if (sd.savetosd) {</div><div> if (!(code->hasM() && code->M == 29)) // still writing to file</div><div> sd.writeCommand(code);</div><div> else</div><div> sd.finishWrite();</div><div>#if ECHO_ON_EXECUTE</div><div> code->echoCommand();</div><div>#endif</div><div> } else</div><div>#endif</div><div> </div><div> if (TriggerState = !lastTriggerState) {</div><div> Commands::executeGCode(code);</div><div> code->popCurrentCommand();</div><div> lastCommandReceived = HAL::timeInMilliseconds();</div><div> lastTriggerState = TriggerState;</div><div> }</div><div> </div><div> } else {</div><div> if (PrintLine::hasLines()) { // if printing no need to reset</div><div> lastCommandReceived = HAL::timeInMilliseconds();</div><div> }</div><div> if (HAL::timeInMilliseconds() - lastCommandReceived > 2000) {</div><div> lastCommandReceived = HAL::timeInMilliseconds();</div><div> Printer::parkSafety(false); // will handle allowed conditions it self</div><div> }</div><div> }</div><div> }</div><div> </div><div> else {</div><div> GCode::keepAlive(Paused); //Warum paused?, weil erste if Bedingung nur true ist, wenn keine user interaktionen stattfinden</div><div> UI_MEDIUM;</div><div> }</div>
<div> Printer::defaultLoopActions();</div><div> //}</div><div class="Spoiler">} </div>

3D_Le

The code above got a bit messy in terms of formatting, so here it is again.

void Commands::commandLoop() {

TriggerState = digitalRead(28);

delay (5);

// while(true) {

#ifdef DEBUG_PRINT

debugWaitLoop = 1;

#endif

Printer::breakLongCommand = false; // block is now finished

if (!Printer::isBlockingReceive()) {

#if SDSUPPORT

if (sd.sdmode == 20) {

if (PrintLine::linesCount == 0) {

sd.pausePrintPart2();

}

if (sd.sdmode == 21) {

if (PrintLine::linesCount == 0) {

sd.stopPrintPart2();

}

#endif

GCode::readFromSerial();

GCode* code = GCode::peekCurrentCommand();

// UI_SLOW; // do longer timed user interface action

UI_MEDIUM; // do check encoder

if (code) {

#if SDSUPPORT

if (sd.savetosd) {

if (!(code->hasM() && code->M == 29)) // still writing to file

sd.writeCommand(code);

else

sd.finishWrite();

#if ECHO_ON_EXECUTE

code->echoCommand();

#endif

} else

#endif

if (TriggerState = !lastTriggerState) {

Commands::executeGCode(code);

code->popCurrentCommand();

lastCommandReceived = HAL::timeInMilliseconds();

lastTriggerState = TriggerState;

}

} else {

if (PrintLine::hasLines()) { // if printing no need to reset

lastCommandReceived = HAL::timeInMilliseconds();

}

if (HAL::timeInMilliseconds() - lastCommandReceived > 2000) {

lastCommandReceived = HAL::timeInMilliseconds();

Printer::parkSafety(false); // will handle allowed conditions it self

}

else {

GCode::keepAlive(Paused); //Warum paused?, weil erste if Bedingung nur true ist, wenn keine user interaktionen stattfinden

UI_MEDIUM;

}

Printer::defaultLoopActions();

//}

}

Repetier

delay (5);
is not necessary.

As a test replace
TriggerState = digitalRead(28);
with
TriggerState = ! TriggerState;

to see if it would still execute. Should apart the fact that you broke sd write. If it now works it is only that line not getting changing signals.

Did you define pin 28 as input pin in setup?

Also note that with this throtteling host/server might create timeouts, also I hope that busy would still get send preventing it.

3D_Le

thanks again for the fast reply.

Yes, ive already definde pin 28 in setup as input.
I've tried a program that counted incoming signals, and everything worked fine there. So, TriggerState = digitalRead(28); is working, but I'll give it a try the way you've written it, just to be sure.
Next up im gonna uncomment all the debugs in Repetier.h and look into the possible debug messages.

If you got any other ideas, why its not working, pls letme know :)

3D_Le

Right after connecting to the extruder, the log shows 'busy: processing'. I always get this, regardless of whether I send signals or not. For the log, see below.
I suspect something might be wrong with the buffers, but I couldn't find anything. I've also tried increasing the buffer sizes.

10:25:24.573 : OpenGL version:4.6.0 NVIDIA 471.41 10:25:24.573 : OpenGL renderer:Quadro P600/PCIe/SSE2 10:25:24.573 : Using fast VBOs for rendering is possible 10:25:28.497 : Printer reset detected - initializing 10:25:28.498 : start 10:25:28.498 : Info:PowerUp 10:25:28.712 : N1 M11034 10:25:28.712 : N2 M11536 10:25:28.712 : N3 M10536 10:25:28.712 : N4 M11435 10:25:28.712 : N5 M111 S698 10:25:28.722 : N6 T060 10:25:28.722 : N7 M2022 10:25:28.724 : N8 M8019 10:25:29.715 : XY jerk was too low, setting to 25.42 10:25:29.716 : Z jerk was too low, setting to 1.77 10:25:29.719 : Free RAM:81480 10:25:29.904 : SD init fail 10:25:29.909 : SD initialization failed. 10:25:29.909 : Do not reformat the card! 10:25:29.913 : Is the card correctly inserted? 10:25:29.917 : Is chipSelect set to the correct value? 10:25:29.921 : Does another SPI device need to be disabled? 10:25:29.921 : Is there a wiring/soldering problem? 10:25:29.925 : errorCode: 32 10:25:29.926 : SelectExtruder:0 10:25:29.930 : FlowMultiply:100 10:25:29.930 : ok 10:25:29.934 : ok 2 10:25:29.954 : N9 M220 S100104 10:25:29.954 : N10 M221 S10081 10:25:29.954 : N11 M111 S687 10:25:29.955 : FIRMWARE_NAME:Repetier_1.0.4 COMPILED:Dec 20 2023 FIRMWARE_URL:https://github.com/repetier/Repetier-Firmware/ PROTOCOL_VERSION:1.0 MACHINE_TYPE:Mendel EXTRUDER_COUNT:1 REPETIER_PROTOCOL:3 10:25:29.955 : Cap:PROGRESS:1 10:25:29.955 : N12 T09 10:25:29.955 : Cap:AUTOREPORT_TEMP:1 10:25:29.955 : Cap:HOST_RESCUE:0 10:25:29.955 : N13 M155 S1*82 10:25:29.956 : Cap:EEPROM:0 10:25:29.956 : Cap:AUTOLEVEL:0 10:25:29.956 : Cap:Z_PROBE:0 10:25:29.958 : Cap:SOFTWARE_POWER:0 10:25:29.958 : Cap:TOGGLE_LIGHTS:0 10:25:29.958 : Cap:PAUSESTOP:1 10:25:29.962 : Cap:PREHEAT:1 10:25:29.962 : Cap:EMERGENCY_PARSER:1 10:25:29.966 : PrinterMode:FFF 10:25:29.966 : ok 3 10:25:31.956 : busy:processing 10:25:33.955 : busy:processing 10:25:35.954 : busy:processing