kopia lustrzana https://github.com/jamesgao/kiln_controller
178 wiersze
3.9 KiB
Arduino
178 wiersze
3.9 KiB
Arduino
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#include <Bounce2.h>
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#define PIN_IGNITE 10
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#define PIN_STEP1 9
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#define PIN_STEP2 8
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#define PIN_STEP3 7
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#define PIN_STEP4 6
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#define PIN_AUXTEMP A1
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#define PIN_TEMP_CS 4
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#define PIN_LOADCELL A3
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#define PIN_FLAME_A A2
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#define PIN_FLAME_D 1
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#define PIN_REGLIMIT 5
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#define STEP_SPEED 250//in steps per second
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#define TEMP_UPDATE 100 //milliseconds
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#define MOTOR_TIMEOUT 5000 //milliseconds
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#include <Stepper.h>
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#include <Wire.h>
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#include <SPI.h>
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#include <Adafruit_MAX31855.h>
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struct Status {
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unsigned char ignite;
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unsigned char flame;
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unsigned int motor;
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float main_temp;
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float ambient;
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float weight;
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float aux_temp[2];
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} status;
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uint8_t* status_data = (uint8_t*) &status;
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const float step_interval = 1. / STEP_SPEED * 1000.; //milliseconds
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//intermediate variables
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Adafruit_MAX31855 thermo(PIN_TEMP_CS);
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Stepper stepper(2048, PIN_STEP1, PIN_STEP3, PIN_STEP2, PIN_STEP4);
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Bounce debouncer = Bounce();
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unsigned int n_clicks = 0; //Number of full rotations
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unsigned long stepper_target;
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char i2c_command;
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float next_step;
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unsigned long next_temp;
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unsigned char motor_active = false;
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void setup() {
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status.flame = false;
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status.weight = 0.;
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status.aux_temp[0] = 0.;
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status.aux_temp[1] = 0.;
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//Setup I2C
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Wire.begin(0x08);
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Wire.onRequest(i2c_update);
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Wire.onReceive(i2c_action);
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//Set up regulator stepper
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status.motor = 0;
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stepper_target = 0;
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//Set pullup for regulator limit
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pinMode(PIN_REGLIMIT, INPUT);
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digitalWrite(PIN_REGLIMIT, HIGH);
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debouncer.attach(PIN_REGLIMIT);
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debouncer.interval(5);
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//setup ignition mosfet
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pinMode(PIN_IGNITE, OUTPUT);
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digitalWrite(PIN_IGNITE, LOW);
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status.ignite = false;
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//set initial temperature
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delay(500);
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update_temp();
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next_temp = millis() + TEMP_UPDATE;
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}
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unsigned long now;
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void loop() {
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now = millis();
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if (stepper_target != status.motor && now > next_step) {
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int dir = status.motor < stepper_target ? 1 : -1;
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stepper.step(dir);
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boolean check = debouncer.update() && debouncer.read() == HIGH;
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if (check) {
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n_clicks += dir;
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}
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//If homing, continuing moving until switch is zero
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if (stepper_target == 0 && check && n_clicks == 0) {
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status.motor = 0;
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} else {
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status.motor += dir;
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}
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next_step += step_interval;
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}
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//put motor to sleep after timeout
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if (motor_active && (now - next_step) > MOTOR_TIMEOUT) {
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digitalWrite(PIN_STEP1, LOW);
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digitalWrite(PIN_STEP2, LOW);
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digitalWrite(PIN_STEP3, LOW);
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digitalWrite(PIN_STEP4, LOW);
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motor_active = false;
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}
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//update temperature
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if (now > next_temp) {
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update_temp();
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next_temp += TEMP_UPDATE;
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}
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//check flame status
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}
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void set_regulator(unsigned long pos) {
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motor_active = true;
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if (stepper_target == status.motor)
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next_step = millis(); //Start stepping immediately
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stepper_target = pos;
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}
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void update_temp() {
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TempData temps;
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thermo.readAll(temps);
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status.main_temp = temps.celcius;
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status.ambient = temps.internal;
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}
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void i2c_update() {
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//update temperatures
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if (i2c_command == 'M') {
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Wire.write((byte*) &(status.motor), 4);
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} else if (i2c_command == 'I') {
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Wire.write((byte*) &(status.ignite), 1);
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} else if (i2c_command == 'T') {
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Wire.write((byte*) &(status.main_temp), 4);
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} else if (i2c_command == 'F') {
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Wire.write((byte*) &(status.flame), 1);
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} else {
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Wire.write(status_data, sizeof(struct Status));
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}
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i2c_command = 0;
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}
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byte buffer[32];
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void i2c_action(int nbytes) {
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i2c_command = Wire.read();
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int i = 0;
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while (Wire.available()) {
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buffer[i++] = Wire.read();
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}
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if (nbytes == 1) {
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return; //Command already stored, no arguments
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}
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switch (i2c_command) {
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case 'M':
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set_regulator(*((unsigned long*) buffer));
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break;
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case 'I':
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digitalWrite(PIN_TEMP_CS, buffer[0]);
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break;
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}
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i2c_command = 0;
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}
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