Initial version of firmware
This commit is contained in:
Rodrigo Arias Mallo
commit
695aa4b3c2
1
barista/.gitignore
vendored
Normal file
1
barista/.gitignore
vendored
Normal file
@ -0,0 +1 @@
|
||||
build/
|
||||
17
barista/Makefile
Normal file
17
barista/Makefile
Normal file
@ -0,0 +1,17 @@
|
||||
PORT=/dev/ttyUSB0
|
||||
FQBN=arduino:avr:atmega328bb
|
||||
OPTS=--no-color --log-level=info -v
|
||||
PROJ=barista
|
||||
BUILD=build/$(subst :,.,$(FQBN))
|
||||
HEX=$(BUILD)/$(PROJ).ino.hex
|
||||
|
||||
all: $(HEX)
|
||||
|
||||
$(HEX): barista.ino
|
||||
arduino-cli compile $(OPTS) -e --fqbn $(FQBN)
|
||||
|
||||
upload: $(HEX)
|
||||
avrdude -vv -p atmega328p -c arduino -P $(PORT) -b 9600 -D -U flash:w:$(HEX):i
|
||||
|
||||
serial:
|
||||
picocom -b 115200 --lower-rts --lower-dtr /dev/ttyUSB0 --imap lfcrlf
|
||||
351
barista/barista.ino
Normal file
351
barista/barista.ino
Normal file
@ -0,0 +1,351 @@
|
||||
/* Copyright (c) 2025 Rodrigo Arias Mallo <rodarima@gmail.com>
|
||||
* SPDX-License-Identifier: GPL-3.0-or-later */
|
||||
|
||||
/*
|
||||
* ATmega328p
|
||||
* +---------+
|
||||
* (PCINT14/RESET) PC6 -|1 \_/ 28|- PC5 (ADC5/SCL/PCINT13)
|
||||
* (PCINT16/RXD) PD0 -|2 27|- PC4 (ADC4/SDA/PCINT12)
|
||||
* (PCINT17/TXD) PD1 -|3 26|- PC3 (ADC3/PCINT11)
|
||||
* (PCINT18/INT0) PD2 -|4 25|- PC2 (ADC2/PCINT10)
|
||||
* (PCINT19/OC2B/INT1) PD3 -|5 24|- PC1 (ADC1/PCINT9)
|
||||
* (PCINT20/XCK/T0) PD4 -|6 23|- PC0 (ADC0/PCINT8)
|
||||
* VCC -|7 22|- GND
|
||||
* GND -|8 21|- AREF
|
||||
* (PCINT6/XTAL1/TOSC1) PB6 -|9 20|- AVCC
|
||||
* (PCINT7/XTAL2/TOSC2) PB7 -|10 19|- PB5 (SCK/PCINT5)
|
||||
* (PCINT21/OC0B/T1) PD5 -|11 18|- PB4 (MISO/PCINT4)
|
||||
* (PCINT22/OC0A/AIN0) PD6 -|12 17|- PB3 (MOSI/OC2A/PCINT3)
|
||||
* (PCINT23/AIN1) PD7 -|13 16|- PB2 (SS/OC1B/PCINT2)
|
||||
* (PCINT0/CLKO/ICP1) PB0 -|14 15|- PB1 (OC1A/PCINT1)
|
||||
* +---------+
|
||||
*
|
||||
*
|
||||
* ATMEL ATMEGA8 & 168 / ARDUINO
|
||||
*
|
||||
* +-\/-+
|
||||
* PC6 1| |28 PC5 (AI 5)
|
||||
* (D 0) PD0 2| |27 PC4 (AI 4)
|
||||
* (D 1) PD1 3| |26 PC3 (AI 3)
|
||||
* (D 2) PD2 4| |25 PC2 (AI 2)
|
||||
* PWM+ (D 3) PD3 5| |24 PC1 (AI 1)
|
||||
* (D 4) PD4 6| |23 PC0 (AI 0)
|
||||
* VCC 7| |22 GND
|
||||
* GND 8| |21 AREF
|
||||
* PB6 9| |20 AVCC
|
||||
* PB7 10| |19 PB5 (D 13)
|
||||
* PWM+ (D 5) PD5 11| |18 PB4 (D 12)
|
||||
* PWM+ (D 6) PD6 12| |17 PB3 (D 11) PWM
|
||||
* (D 7) PD7 13| |16 PB2 (D 10) PWM
|
||||
* (D 8) PB0 14| |15 PB1 (D 9) PWM
|
||||
* +----+
|
||||
*
|
||||
*
|
||||
*/
|
||||
|
||||
enum pinout {
|
||||
/* Inputs */
|
||||
PIN_POWER_ON = 8,
|
||||
PIN_HOT = 9,
|
||||
//PIN_FLOW = PIN_D5,
|
||||
|
||||
/* Outputs */
|
||||
PIN_LED_GREEN = 5,
|
||||
PIN_LED_RED = 6,
|
||||
PIN_HEAT = 7,
|
||||
PIN_PUMP = 12,
|
||||
PIN_BUZZ = 10,
|
||||
|
||||
/* Analog */
|
||||
PIN_NTC = PIN_A0,
|
||||
};
|
||||
|
||||
enum logic {
|
||||
ON = 1,
|
||||
OFF = 0,
|
||||
};
|
||||
|
||||
#define DEBOUNCE_TIME 20L /* ms */
|
||||
#define TEMP_MIN 600
|
||||
#define TEMP_MAX 700
|
||||
|
||||
#define LED_MIN_VALUE 0
|
||||
|
||||
enum state {
|
||||
SLEEPING,
|
||||
DEBOUNCE,
|
||||
HEATING,
|
||||
HOT,
|
||||
BREWING,
|
||||
COOLING,
|
||||
};
|
||||
|
||||
long debounce_t0 = 0;
|
||||
int state = SLEEPING;
|
||||
|
||||
enum button {
|
||||
BUTTON_ON = 0,
|
||||
BUTTON_HOT,
|
||||
MAX_BUTTON,
|
||||
};
|
||||
|
||||
enum button_state {
|
||||
RESTING = 0,
|
||||
PRESSING,
|
||||
PRESSED,
|
||||
RELEASING,
|
||||
RELEASED,
|
||||
};
|
||||
|
||||
enum buzz_state {
|
||||
BUZZ_OFF = 0,
|
||||
BUZZ_HEY,
|
||||
BUZZ_STOP,
|
||||
};
|
||||
|
||||
int buzz_state;
|
||||
|
||||
int button_pin[MAX_BUTTON] = {
|
||||
[BUTTON_ON] = PIN_POWER_ON,
|
||||
[BUTTON_HOT] = PIN_HOT,
|
||||
};
|
||||
|
||||
int button_state[MAX_BUTTON];
|
||||
unsigned long button_press_t0[MAX_BUTTON];
|
||||
unsigned long button_release_t0[MAX_BUTTON];
|
||||
|
||||
int read_input(int pin)
|
||||
{
|
||||
return !digitalRead(pin);
|
||||
}
|
||||
|
||||
void relay(int pin, enum logic st)
|
||||
{
|
||||
/* Relays are active low */
|
||||
if (st == ON)
|
||||
digitalWrite(pin, 0);
|
||||
else
|
||||
digitalWrite(pin, 1);
|
||||
}
|
||||
|
||||
void setled(int pin, enum logic st)
|
||||
{
|
||||
/* LEDs are active high */
|
||||
if (st == ON)
|
||||
digitalWrite(pin, 1);
|
||||
else
|
||||
digitalWrite(pin, 0);
|
||||
}
|
||||
|
||||
void update_buttons()
|
||||
{
|
||||
for (int i = 0; i < MAX_BUTTON; i++) {
|
||||
int st = button_state[i];
|
||||
int pin = button_pin[i];
|
||||
if (st == RESTING) {
|
||||
if (read_input(pin) == ON) {
|
||||
button_state[i] = PRESSING;
|
||||
button_press_t0[i] = millis();
|
||||
}
|
||||
} else if (st == PRESSING) {
|
||||
if (read_input(pin) != ON) {
|
||||
button_state[i] = RESTING;
|
||||
} else if (millis() - button_press_t0[i] > DEBOUNCE_TIME) {
|
||||
button_state[i] = PRESSED;
|
||||
}
|
||||
} else if (st == PRESSED) {
|
||||
if (read_input(pin) != ON) {
|
||||
button_state[i] = RELEASING;
|
||||
button_release_t0[i] = millis();
|
||||
}
|
||||
} else if (st == RELEASING) {
|
||||
if (read_input(pin) == ON) {
|
||||
button_state[i] = PRESSED;
|
||||
} else if (millis() - button_release_t0[i] > DEBOUNCE_TIME) {
|
||||
button_state[i] = RELEASED;
|
||||
}
|
||||
} else if (st == RELEASED) {
|
||||
button_state[i] = RESTING;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int red_min = 50;
|
||||
int red_state = red_min;
|
||||
unsigned long brewing_time = 3000UL; /* 3 seconds */
|
||||
unsigned long cooling_time = 3000UL; /* 3 seconds */
|
||||
unsigned long max_heating_time = 10000UL; /* 10 seconds */
|
||||
unsigned long max_idle_time = 10000UL; /* 10 seconds */
|
||||
|
||||
void progress()
|
||||
{
|
||||
int temp = analogRead(PIN_NTC);
|
||||
int on = (button_state[BUTTON_ON] == RELEASED);
|
||||
int hot = (button_state[BUTTON_HOT] == PRESSED);
|
||||
|
||||
static unsigned long brewing_t0 = 0;
|
||||
static unsigned long cooling_t0 = 0;
|
||||
static unsigned long heating_t0 = 0;
|
||||
static unsigned long hot_t0 = 0;
|
||||
|
||||
Serial.print("state=");
|
||||
Serial.print(state);
|
||||
Serial.print(" on=");
|
||||
Serial.print(on);
|
||||
Serial.print(" temp=");
|
||||
Serial.println(temp);
|
||||
|
||||
/* Pressing ON cancels any operation */
|
||||
if (state != SLEEPING && on) {
|
||||
state = SLEEPING;
|
||||
return;
|
||||
}
|
||||
|
||||
if (state == SLEEPING) {
|
||||
if (on) {
|
||||
state = HEATING;
|
||||
heating_t0 = millis();
|
||||
Serial.println("heating");
|
||||
}
|
||||
} else if (state == HEATING) {
|
||||
if (temp > TEMP_MAX) {
|
||||
state = HOT;
|
||||
hot_t0 = millis();
|
||||
buzz_state = BUZZ_HEY;
|
||||
Serial.println("hot");
|
||||
} else if (millis() - heating_t0 > max_heating_time) {
|
||||
/* TODO: Add alarm state */
|
||||
state = SLEEPING;
|
||||
Serial.println("cannot heat, going to sleep");
|
||||
}
|
||||
} else if (state == HOT) {
|
||||
if (hot) {
|
||||
state = BREWING;
|
||||
brewing_t0 = millis();
|
||||
Serial.println("brewing");
|
||||
} else if (millis() - hot_t0 > max_idle_time) {
|
||||
state = SLEEPING;
|
||||
Serial.println("idle timeout, going to sleep");
|
||||
}
|
||||
} else if (state == BREWING) {
|
||||
if (millis() - brewing_t0 > brewing_time) {
|
||||
state = COOLING;
|
||||
cooling_t0 = millis();
|
||||
Serial.println("cooling");
|
||||
}
|
||||
} else if (state == COOLING) {
|
||||
/* TODO: Wait a bit and go back to heating */
|
||||
if (millis() - cooling_t0 > cooling_time) {
|
||||
state = HEATING;
|
||||
heating_t0 = millis();
|
||||
Serial.println("heating");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
update_leds()
|
||||
{
|
||||
static int r = 0;
|
||||
static int g = 0;
|
||||
|
||||
if (state == HEATING || state == COOLING) {
|
||||
analogWrite(PIN_LED_RED, r);
|
||||
setled(PIN_LED_GREEN, 0);
|
||||
if (r >= 255)
|
||||
r = 0;
|
||||
else
|
||||
r += 3;
|
||||
} else if (state == HOT) {
|
||||
setled(PIN_LED_RED, 0);
|
||||
setled(PIN_LED_GREEN, 1);
|
||||
r = 0;
|
||||
} else if (state == BREWING) {
|
||||
setled(PIN_LED_RED, 0);
|
||||
analogWrite(PIN_LED_GREEN, g);
|
||||
if (g >= 255)
|
||||
g = 0;
|
||||
else
|
||||
g += 3;
|
||||
} else {
|
||||
setled(PIN_LED_RED, 0);
|
||||
setled(PIN_LED_GREEN, 0);
|
||||
r = 0;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
update_heater()
|
||||
{
|
||||
if (state == HEATING || state == HOT || state == BREWING) {
|
||||
int temp = analogRead(PIN_NTC);
|
||||
if (temp < TEMP_MIN)
|
||||
relay(PIN_HEAT, ON);
|
||||
else if (temp > TEMP_MAX)
|
||||
relay(PIN_HEAT, OFF);
|
||||
} else {
|
||||
relay(PIN_HEAT, OFF);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
update_pump()
|
||||
{
|
||||
if (state == BREWING) {
|
||||
relay(PIN_PUMP, ON);
|
||||
} else {
|
||||
relay(PIN_PUMP, OFF);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
update_buzz()
|
||||
{
|
||||
static unsigned long started = 0;
|
||||
|
||||
if (buzz_state == BUZZ_HEY) {
|
||||
tone(PIN_BUZZ, 1500);
|
||||
if (started == 0)
|
||||
started = millis();
|
||||
else if (millis() - started > 20) {
|
||||
buzz_state = BUZZ_OFF;
|
||||
}
|
||||
} else if (buzz_state == BUZZ_STOP) {
|
||||
tone(PIN_BUZZ, 220);
|
||||
} else if (buzz_state == BUZZ_OFF) {
|
||||
noTone(PIN_BUZZ);
|
||||
started = 0;
|
||||
}
|
||||
}
|
||||
|
||||
void setup()
|
||||
{
|
||||
Serial.begin(9600);
|
||||
Serial.println("Booting");
|
||||
|
||||
pinMode(PIN_POWER_ON, INPUT);
|
||||
pinMode(PIN_HOT, INPUT);
|
||||
|
||||
pinMode(PIN_LED_RED, OUTPUT);
|
||||
pinMode(PIN_LED_GREEN, OUTPUT);
|
||||
pinMode(PIN_HEAT, OUTPUT);
|
||||
pinMode(PIN_PUMP, OUTPUT);
|
||||
|
||||
/* Turn all relays off */
|
||||
relay(PIN_HEAT, OFF);
|
||||
relay(PIN_PUMP, OFF);
|
||||
|
||||
Serial.println("Ready");
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
//Serial.println("Looping...");
|
||||
update_buttons();
|
||||
progress();
|
||||
update_leds();
|
||||
update_heater();
|
||||
update_pump();
|
||||
update_buzz();
|
||||
delay(5);
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user