minimize cable to extruder

tgreif · October 2019

i would like to build a PCB with stepperdriver for the extruder( only if possible ) , power mosfet for the heater analog input for the thermistor and n° 2 digital low power output for the vent's .
this i would like to control in from fimware by i2C or somthing else .
is it possible that the firmware supports the "remote board" .

Repetier · October 2019

Not for the stepper driver. We need to set steps very quickly in an interrupt, I2C is much too slow and also I2C/SPI are not allowed in interrupts in firmware, only in main thread.

For fan/heater it is not supported but doable if you can program. Just modify the function setting fan, heater or getting temperture to send values instead of doing analog read, changing pwm ... SO if you can program that would be no problem. But you need step/dir/enable signal for stepper in addition.

tgreif · October 2019

Thanks i will try .

tgreif · October 2019

Thanks i will try .

tgreif · November 2019

hi everybody .
i make two sketches , one for the master( to be integrated to the repetierfirmware and the second the slave for the arduino on the pcb for extruder .
in this way i need at the extruder PCB only the 12Vdc , 5V and GND + two wires for the I2C. likeyou told me i need also the step and direction signal for the stepper driver wich is mounted to the PCB.
so i can read the value of two hotend teperature, control 2x mosfet for heater, control 2x fan for hotend+ 2x fan for colling+ steper enable. on only 5 wires + stepper pule and direction.
my problem now is that i'm not sure in wich way i ca integrate (and how) the master sketch to the repetierfirmware .
I am grateful for every idea
thomas

NB i surely in the end i've to clenup the sketch from junk needed for controll

master sketch ------------------------------------------------------------------------------------------------------------------------------

/* I2C communication between arduino (repetier-firmware and remote Arduino

* master unit

* the master will richiest 2 bytes from slave unit ( temperatur of TH1 and TH2 )

* the master will send the state of 1 byte to the slave unit for fan and heater controll .

*

* read the values of two extruder temperatur firstbyte+secondbyte

* data

* control a mosfet for two heaters bit 0+1

* controll two hotend fan's bit 2+3

* control two fan's for print cooling. bit 4+5

* stepper enable + reserve bit 6+7 bit 6+7

* pooling time 100ms

created by thomas greif 12/11/2019

note: the sketch has to be cleard up from controlfunctions

*/

#include <Wire.h>

// set pin numbers:

const int buttonPin12 = 12; // the number of the pushbutton pin

const int buttonPin11 = 11;

const int buttonPin10 = 10;

const int buttonPin9 = 9;

const int ledPin6 = 7; // the number of the LED pin

const int ledPin5 = 6;

const int ledPin4 = 5;

const int ledPin3 = 4;

// variables will change:

int buttonState1 = 0; // variable for reading the pushbutton status

int buttonState2 = 0;

int buttonState3 = 0;

int buttonState4 = 0;

byte Data = 0; // data to send to slave

void setup() {

Serial.begin(9600); // inizialize serial only for control

Wire.begin(); // inizialize wire

// initialize the LED pin as an output:

pinMode(ledPin6, OUTPUT); pinMode(ledPin5, OUTPUT); pinMode(ledPin4, OUTPUT); pinMode(ledPin3, OUTPUT);

// initialize the pushbutton pin as an input:

pinMode(buttonPin12, INPUT);pinMode(buttonPin11, INPUT);pinMode(buttonPin10, INPUT);pinMode(buttonPin9, INPUT);

}

// main loop

void loop() {

Wire.requestFrom(7,2); // riechiest from slave(7) two bytes :

while(Wire.available()){

byte firstbyte = Wire.read(); // first Byte

byte secondbyte = Wire.read(); // second Byte

// print only for control

Serial.print(firstbyte);

Serial.print("+");

Serial.print(secondbyte);

Serial.print(" as Bin ");

Serial.print(Data, BIN);

}

Serial.println(); // next line

// read the state of the pushbutton value only for simulation

buttonState1 = digitalRead(buttonPin12);

buttonState2 = digitalRead(buttonPin11);

buttonState3 = digitalRead(buttonPin10);

buttonState4 = digitalRead(buttonPin9);

// check if the pushbutton if pressed the buttonState is HIGH:

// to be changed by the bit of repetier-firmware

if (buttonState1 == HIGH) {

// turn LED on:

digitalWrite(ledPin6, HIGH);

bitWrite(Data, 0, 1);

} else {

// turn LED off:

digitalWrite(ledPin6, LOW);

bitWrite(Data, 0, 0);

}

if (buttonState2 == HIGH) {

// turn LED on:

digitalWrite(ledPin5, HIGH);

bitWrite(Data, 1, 1);

} else {

// turn LED off:

digitalWrite(ledPin5, LOW);

bitWrite(Data, 1, 0);

}

if (buttonState3 == HIGH) {

// turn LED on:

digitalWrite(ledPin4, HIGH);

bitWrite(Data, 2, 1);

} else {

// turn LED off:

digitalWrite(ledPin4, LOW);

bitWrite(Data, 2, 0);

}

if (buttonState4 == HIGH) {

// turn LED on:

digitalWrite(ledPin3, HIGH);

bitWrite(Data, 3, 1);

} else {

// turn LED off:

digitalWrite(ledPin3, LOW);

bitWrite(Data, 3, 0);

}

bitWrite(Data, 4, 0);

bitWrite(Data, 5, 0);

bitWrite(Data, 6, 0);

bitWrite(Data, 7, 0);

// ende byte bitweise schreiben

Wire.beginTransmission(7);

Wire.write(Data); // prima byte da trasmettere al slave

Wire.endTransmission();

delay(100);

}

slave sketch ---------------------------------------------------------------------------------------------------------------------------------

/* I2C communication between arduino (repetier-firmware and remote Arduino

* Slave unit

* the master will richiest 2 bytes from slave unit ( temperatur of TH1 and TH2 )

* the master will send the state of 1 byte to the slave unit for fan and heater controll .

*

* read the values of two extruder temperatur firstbyte+secondbyte

* data

* control a mosfet for two heaters bit 0+1

* controll two hotend fan's bit 2+3

* control two fan's for print cooling. bit 4+5

* stepper enable + reserve bit 6+7

* pooling time 100ms

created by thomas greif 12/11/2019

note: the sketch has to be cleard up from controlfunctions

*/

#include <Wire.h>

// impostazione

const int analogInPin = A0; // Analog input pin that the potentiometer is attached to

const int analogInPin1 = A3; // Analog input pin that the potentiometer is attached to

const int analogOutPin = 11; // Analog output pin that the LED is attached to

int sensorValue = 0; // value read from the pot

int sensorValue1 = 0; // value read from the pot

int outputValue = 0; // value output to the PWM (analog out)

int outputValue1 = 0; // value output to the PWM (analog out)

byte Data = 0; // recive data primo byte

// inizio setup

void setup() {

pinMode(10, OUTPUT); // set pin 10 as output

pinMode(9, OUTPUT); // set pin 9 as output

pinMode(8, OUTPUT); // set pin 8 as output

pinMode(7, OUTPUT); // set pin 7 as output

pinMode(6, OUTPUT); // set pin 6 as output

pinMode(5, OUTPUT); // set pin 5 as output

pinMode(4, OUTPUT); // set pin 4 as output

pinMode(3, OUTPUT); // set pin 3 as output

//pinMode(pulsantePin, INPUT); // set pulsantePin as input

Wire.begin(7); // start wire

Wire.onRequest(answer); // initialize answer

Wire.onReceive(recive); // initialize recive

Serial.begin(9600); // initialize serial communications at 9600 bps:

}

// end setup

// inizio ciclo

void loop() {

// read analog value and output at A0 on a 255 base

sensorValue = analogRead(analogInPin); // read the analog in value:

outputValue = map(sensorValue, 0, 1023, 0, 255); // map it to the range of the analog out:

analogWrite(analogOutPin, outputValue); // change the analog out value:

// read analog value and output at A0 on a 255 base

sensorValue1 = 300; // read the analog in value:

outputValue1 = map(sensorValue1, 0, 1023, 0, 255); // map it to the range of the analog out:

// analogWrite(analogOutPin, outputValue); // change the analog out value:

// wait 10 milliseconds before the next loop

delay(10);

}

// aswer for the master

void answer(){

Wire.write(outputValue);

Wire.write(outputValue1);

}

// end of answer

// recived data from master

void recive(){

Data=0; //set data to 0 in binario 00000000

while(Wire.available()){

Data = (Wire.read());

// print data as binary

Serial.println(Data, BIN);

// end print

// loop for output's

int i=0;

for (i = 0; i < 8; i++) {

if (bitRead(Data, i) == 1) {

digitalWrite(10-i, HIGH); // if 1 == out i on

//Serial.println("hight");

} else {

// turn LED off:

digitalWrite(10-i, LOW); // if 0 == out i off

//Serial.println("low");

}

Repetier · November 2019

The temperature control is all I see and all needed as step/dir/enable is using direct pins I guess. Looks like you only want pwm value from firmware and get sensor read.

All is in Extruder.cpp. Only thing is your loop is bad on slave side. You will never get a do all command. For each action you need an own command and after getting the command read the payload or reserve some bits as payload. E.g. lets say bits 0-3 are commands so you can have 16 actions and you can add in bits 4-7 also 4 bit payload e.g. enable or disable a light/enable/.. For setting PWM you need a extra byte with value of course but you can encode in bit which of the 2 heaters is meant.

That you need to find all the places where normally pins/pwm is set or analog value gets read and add some code like in your master part to execute exactly that action. That is why you need individual actions and can not make a all in one solution.

minimize cable to extruder

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