Using interrupts for buttons
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2 changed files with 73 additions and 52 deletions
4
TODO.md
4
TODO.md
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@ -1,4 +0,0 @@
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# TODOs
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- Improve button press behavior / performance
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- Add more config options (e.g. temp range)
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121
main.py
121
main.py
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@ -1,14 +1,16 @@
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from machine import Pin, I2C
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from onewire import OneWire
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from ds18x20 import DS18X20
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from time import sleep_ms
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from time import sleep_ms, ticks_ms, ticks_diff
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from lcd_api import LcdApi
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from pico_i2c_lcd import I2cLcd
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import _thread
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# Version
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VERSION = "1.0.0"
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# Relais
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relais = Pin(18, machine.Pin.OUT, value = 1)
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led_onboard = Pin(25, machine.Pin.OUT, value = 0)
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#led_onboard = Pin(25, machine.Pin.OUT, value = 0)
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# Temperature
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temp_sensor = DS18X20(OneWire(Pin(28)))
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@ -32,80 +34,103 @@ degree = (
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0b00000,
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0b00000,
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)
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# Buttons
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button1 = Pin(17, Pin.IN, Pin.PULL_DOWN)
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button2 = Pin(16, Pin.IN, Pin.PULL_DOWN)
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button3 = Pin(15, Pin.IN, Pin.PULL_DOWN)
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global button1_pressed
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global button2_pressed
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global button3_pressed
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button1_pressed = False
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button2_pressed = False
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button3_pressed = False
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umlaut_a = (
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0b01010,
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0b00000,
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0b01110,
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0b00001,
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0b01111,
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0b10001,
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0b01111,
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0b00000,
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)
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def ctrl_relais(active = True):
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if active:
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relais.value(0)
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led_onboard.on()
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#led_onboard.on()
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else:
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relais.value(1)
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led_onboard.off()
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def button_reader_thread():
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global button1_pressed
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global button2_pressed
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global button3_pressed
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while True:
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if button1.value() == 1:
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button1_pressed = True
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if button2.value() == 1:
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button2_pressed = True
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if button3.value() == 1:
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button3_pressed = True
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sleep_ms(100)
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#led_onboard.off()
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lcd.backlight_on()
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lcd.clear()
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lcd.custom_char(0, degree)
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lcd.custom_char(1, umlaut_a)
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temp_tgt = 28.0
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temp_gap = 0.5
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is_heating = False
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heat_string = ""
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system_on = False
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system_on_string = ""
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system_on_string = "OFF"
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temp_curr = 0
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_thread.start_new_thread(button_reader_thread, ())
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lcd.move_to(0, 0)
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lcd.putstr(" G" + chr(1) + "rbox Manager\n (Ver. "+ VERSION + ")")
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sleep_ms(3000)
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# Buttons
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PIN_BUTTON_1 = 17
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PIN_BUTTON_2 = 16
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PIN_BUTTON_3 = 15
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button1 = Pin(PIN_BUTTON_1, Pin.IN, Pin.PULL_DOWN)
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button2 = Pin(PIN_BUTTON_2, Pin.IN, Pin.PULL_DOWN)
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button3 = Pin(PIN_BUTTON_3, Pin.IN, Pin.PULL_DOWN)
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button1_last = ticks_ms()
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button2_last = ticks_ms()
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button3_last = ticks_ms()
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def button_action(pin):
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global temp_tgt
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global button1_last
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global button2_last
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global button3_last
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global system_on
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global system_on_string
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if pin is button1:
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if ticks_diff(ticks_ms(), button1_last) > 750:
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temp_tgt -= 0.5
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#lcd.move_to(5, 1)
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#lcd.putstr("{0:3.1f}".format(temp_tgt))
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button1_last = ticks_ms()
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elif pin is button2:
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if ticks_diff(ticks_ms(), button2_last) > 750:
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temp_tgt += 0.5
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#lcd.move_to(5, 1)
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#lcd.putstr("{0:3.1f}".format(temp_tgt))
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button2_last = ticks_ms()
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elif pin is button3:
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if ticks_diff(ticks_ms(), button3_last) > 750:
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system_on = not system_on
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if system_on == True:
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system_on_string = "ON "
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else:
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system_on_string = "OFF"
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#lcd.move_to(13, 1)
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#lcd.putstr(system_on_string)
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button3_last = ticks_ms()
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button1.irq(trigger = Pin.IRQ_RISING, handler = button_action)
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button2.irq(trigger = Pin.IRQ_RISING, handler = button_action)
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button3.irq(trigger = Pin.IRQ_RISING, handler = button_action)
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while True:
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temp_sensor.convert_temp()
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sleep_ms(750)
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temp_curr = temp_sensor.read_temp(sensor_id)
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if button1_pressed == True:
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temp_tgt -= 0.5
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button1_pressed = False
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if button2_pressed == True:
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temp_tgt += 0.5
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button2_pressed = False
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if button3_pressed == True:
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system_on = not system_on
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button3_pressed = False
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if system_on == True and temp_curr < temp_tgt - temp_gap:
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is_heating = True
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elif system_on == True and temp_curr > temp_tgt + temp_gap:
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is_heating = False
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elif system_on == False:
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is_heating = False
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ctrl_relais(is_heating)
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if system_on == True:
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system_on_string = "ON "
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else:
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system_on_string = "OFF"
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is_heating = False
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if is_heating == True:
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heat_string = ">H<"
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else:
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@ -113,4 +138,4 @@ while True:
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lcd.move_to(0, 0)
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lcd.putstr("ACT: {0:3.1f}".format(temp_curr) + chr(0) + "C " + heat_string +
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"\nTGT: {0:3.1f}".format(temp_tgt) + chr(0) + "C " + system_on_string)
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"\nTGT: {0:3.1f}".format(temp_tgt) + chr(0) + "C " + system_on_string)
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