T12白光洛铁PCB原理图开源 Arduino源程序 -

// SolderingStation v0.6
//
// ATmega168/328-controlled Soldering Station for Hakko T12 Tips.
// This version of the code implements:
// - PID control of the heater
// - Temperature measurement of the tip
// - Temperature control via rotary encoder
// - Boost mode by pressing rotary encoder switch
// - Time driven sleep/power off mode according to handle movement
// - Information display on OLED
//
// Future versions may implement:
// - Measurement of input voltage and vcc
// - Buzzer
// - Setup menu
// - Storing default values into the EEPROM
// - Check if iron is connected
//
//
// Clockspeed 16 MHz external.
//
// 2019 by Stefan Wagner
//
// based on the work of Jurgis Bal?iūnas (http://jurgis.me)
// Libraries
#include <PID_v1.h>
#include <U8glib.h>
// Pins
#define SENSOR_PIN A0 // temperature sense
#define VIN_PIN A1 // input voltage sense
#define BUZZER_PIN 5 // buzzer
#define BUTTON_PIN 6 // rotary encoder switch
#define ROTARY_1_PIN 7 // rotary encoder 1
#define ROTARY_2_PIN 8 // rotary encoder 2
#define CONTROL_PIN 9 // heater MOSFET PWM control
#define SWITCH_PIN 10 // handle vibration switch
// Temperature control values
#define TEMP_MIN 150 // min selectable temperature
#define TEMP_MAX 400 // max selectable temperature
#define TEMP_DEFAULT 320 // default start setpoint
#define TEMP_SLEEP 150 // temperature in sleep mode
#define TEMP_BOOST 50 // temperature increase in boost mode
#define TEMP_STEP 10 // rotary encoder temp change steps
// Timer values (0 = disabled)
#define TIME2SLEEP 5 // time to enter sleep mode in minutes
#define TIME2OFF 15 // time to shut off heater in minutes
#define TIMEOFBOOST 30 // time of boost mode in seconds
// Define the aggressive and conservative PID tuning parameters
double aggKp=20, aggKi=0, aggKd=1;
double consKp=20, consKi=1, consKd=1;
// Variables for pin change interrupt
volatile uint8_t a0, b0, c0, d0;
volatile int count = TEMP_DEFAULT;
volatile bool handleMoved;
// Variables for temperature control
double Setpoint = TEMP_DEFAULT;
double Input, Output, CurrentTemp, ShowTemp;
// Other variables
bool inSleepMode = false;
bool inOffMode = false;
bool inBoostMode = false;
uint32_t sleepmillis;
uint32_t boostmillis;
uint8_t goneMinutes;
uint8_t goneSeconds;
// Specify the links and initial PID tuning parameters
PID ctrl(&Input, &Output, &Setpoint, aggKp, aggKi, aggKd, REVERSE);
// Setup u8g object (OLED 128x64, Fast I2C)
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0|U8G_I2C_OPT_NO_ACK|U8G_I2C_OPT_FAST);
void setup() {
// set the pin modes
pinMode(SENSOR_PIN, INPUT);
pinMode(CONTROL_PIN, OUTPUT);
pinMode(ROTARY_1_PIN, INPUT_PULLUP);
pinMode(ROTARY_2_PIN, INPUT_PULLUP);
pinMode(BUTTON_PIN, INPUT_PULLUP);
pinMode(SWITCH_PIN, INPUT_PULLUP);
// setup pin change interrupt for rotary encoder
PCMSK0 = bit (PCINT0); // Configure pin change interrupt on Pin8
PCICR = bit (PCIE0); // Enable pin change interrupt
PCIFR = bit (PCIF0); // Clear interrupt flag
// prepare and start OLED
if ( u8g.getMode() == U8G_MODE_R3G3B2 ) u8g.setColorIndex(255);
else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) u8g.setColorIndex(3);
else if ( u8g.getMode() == U8G_MODE_BW ) u8g.setColorIndex(1);
else if ( u8g.getMode() == U8G_MODE_HICOLOR ) u8g.setHiColorByRGB(255,255,255);
// tell the PID to range between 0 and the full window size
ctrl.SetOutputLimits(0, 255);
// start PID
ctrl.SetMode(AUTOMATIC);
// set initial temperature to default value and clear rotary encoder values
count = TEMP_DEFAULT;
a0 = PINB & 1;
b0 = PIND>>7 & 1;
// reset sleep timer
sleepmillis = millis();
}
void loop() {
BOOSTCheck(); // check and activate/deactivate boost mode
SLEEPCheck(); // check and activate/deactivate sleep modes
ADCSample(); // reads temperature and vibration switch of the iron
PIDUpdate(); // updates the PID and sets the PWM duty cycle for the heater
OLEDRedraw(); // updates the OLED
}
// check and activate/deactivate boost mode
void BOOSTCheck() {
// check rotary encoder switch
uint8_t c = digitalRead(BUTTON_PIN);
if ( !c && c0 ) {
inBoostMode = !inBoostMode;
if (inBoostMode) boostmillis = millis();
handleMoved = true;
}
c0 = c;
// check timer when in boost mode
if (inBoostMode) {
goneSeconds = (millis() - boostmillis) / 1000;
if (goneSeconds >= TIMEOFBOOST) inBoostMode = false;
}
}
// check and activate/deactivate sleep modes
void SLEEPCheck() {
if (handleMoved) { // if handle was moved
handleMoved = false; // reset handleMoved flag
inSleepMode = false; // reset sleep flag
inOffMode = false; // reset off flag
sleepmillis = millis(); // reset sleep timer
}
// check time passed since the handle was moved
goneMinutes = (millis() - sleepmillis) / 60000;
if ( (TIME2SLEEP > 0) && (goneMinutes >= TIME2SLEEP) ) inSleepMode = true;
if ( (TIME2OFF > 0) && (goneMinutes >= TIME2OFF ) ) inOffMode = true;
}
// reads temperature and vibration switch of the iron
void ADCSample() {
// shut off heater in order to measure temperature and vibration switch
// this also allows the bootstrap capacitor to recharge
analogWrite(CONTROL_PIN, 255);
delayMicroseconds(300);
// read temperature and filter ADC by multisampling
uint16_t adc = 0;
for (uint8_t i = 0; i < 32; i++)
adc += analogRead(SENSOR_PIN);
adc >>= 5;
// check handle vibration switch
uint8_t d = digitalRead(SWITCH_PIN);
if (d != d0) {
handleMoved = true;
d0 = d;
}
// turn on again heater
analogWrite(CONTROL_PIN, Output);
// apply quadratic equation to get temperature
double temp = -0.0013*adc*adc + 1.696*adc - 59.284;
// additional temperature filtering
CurrentTemp += (temp-CurrentTemp)*0.05;
}
// updates the PID and sets the PWM duty cycle for the heater
void PIDUpdate() {
if (inOffMode) Setpoint = 0;
else if (inSleepMode) Setpoint = TEMP_SLEEP;
else if (inBoostMode) Setpoint = count + TEMP_BOOST;
else Setpoint = count;
Input = CurrentTemp;
double gap = abs(Setpoint-Input); //distance away from setpoint
if (gap < 20) ctrl.SetTunings(consKp, consKi, consKd);
else ctrl.SetTunings(aggKp, aggKi, aggKd);
ctrl.Compute();
analogWrite(CONTROL_PIN, Output);
}
// updates the OLED
void OLEDRedraw() {
u8g.firstPage();
do {
// draw setpoint temperature
u8g.setFont(u8g_font_9x15);
u8g.setFontPosTop();
u8g.drawStr( 0, 0, "SET:");
u8g.setPrintPos(40,0);
u8g.print(Setpoint, 0);
// draw status of heater
u8g.setPrintPos(82,0);
if (inOffMode) u8g.print(" OFF");
else if (inSleepMode) u8g.print("SLEEP");
else if (inBoostMode) u8g.print("BOOST");
else if (Output < 180) u8g.print(" HEAT");
else u8g.print(" HOLD");
// draw current temperature in big figures
u8g.setFont(u8g_font_fub42n);
u8g.setFontPosTop();
u8g.setPrintPos(15,20);
u8g.print(CurrentTemp, 0);
} while(u8g.nextPage());
}
// Pin change interrupt service routine for rotary encoder
ISR (PCINT0_vect) {
uint8_t a = PINB & 1;
uint8_t b = PIND>>7 & 1;
if (a != a0) { // A changed
a0 = a;
if (b != b0) { // B changed
b0 = b;
count = constrain(count + ((a == b) ? TEMP_STEP : -TEMP_STEP), TEMP_MIN, TEMP_MAX);
handleMoved = true;
}
}
}

复制代码