Add rotary knob volume control

This commit is contained in:
Correl Roush 2023-05-27 17:36:27 -04:00
parent e1fb103db9
commit 3b3e4d9f34
3 changed files with 285 additions and 9 deletions

39
main.py
View file

@ -10,6 +10,7 @@ from umqtt.simple import MQTTClient
import ssd1306 import ssd1306
import mcp4 import mcp4
from rotary_irq_esp import RotaryIRQ
from statetree import StateTree from statetree import StateTree
VOLUME_MAX = const(128) VOLUME_MAX = const(128)
@ -29,12 +30,24 @@ state = StateTree(
) )
last_update = 0 last_update = 0
i2c = SoftI2C(sda=Pin(2), scl=Pin(16)) rotary = RotaryIRQ(
33,
32,
0,
max_val=128,
range_mode=RotaryIRQ.RANGE_BOUNDED,
pull_up=True,
)
rotary_value = rotary.value()
try:
i2c = SoftI2C(sda=Pin(21), scl=Pin(22))
oled_width = const(128) oled_width = const(128)
oled_height = const(32) oled_height = const(32)
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c) oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
buf = bytearray((oled_height // 8) * oled_width) except Exception as e:
fbuf = framebuf.FrameBuffer1(buf, oled_width, oled_height) print("WARNING: OLED unavailable:", e)
oled = None
sta_if = network.WLAN(network.STA_IF) sta_if = network.WLAN(network.STA_IF)
@ -65,11 +78,25 @@ def on_message(topic, msg):
def loop(): def loop():
global mqtt, state, last_update global mqtt, state, last_update, rotary, rotary_value
state["volume"]["left"] = pot.read(0) state["volume"]["left"] = pot.read(0)
state["volume"]["right"] = pot.read(1) state["volume"]["right"] = pot.read(1)
if state.changed:
# Volume changed externally
rotary.set(value=max(state["volume"]["left"], state["volume"]["right"]))
rotary_value = rotary.value()
new_value = rotary.value()
if rotary_value != new_value:
print("Rotary:", new_value)
state["volume"]["left"] = new_value
state["volume"]["right"] = new_value
pot.write(0, new_value)
pot.write(1, new_value)
rotary_value = new_value
if not sta_if.active(): if not sta_if.active():
print("Connecting to WiFi") print("Connecting to WiFi")
sta_if.active(True) sta_if.active(True)
@ -170,7 +197,7 @@ def loop():
mqtt.publish(topic, payload, retain=True) mqtt.publish(topic, payload, retain=True)
last_update = utime.time() last_update = utime.time()
mqtt.check_msg() mqtt.check_msg()
if state.changed: if oled and state.changed:
oled.fill(0) oled.fill(0)
oled.framebuf.rect(10, 0, 92, 8, 1) oled.framebuf.rect(10, 0, 92, 8, 1)
oled.framebuf.rect( oled.framebuf.rect(
@ -191,4 +218,4 @@ def loop():
while True: while True:
loop() loop()
utime.sleep(1) utime.sleep(0.1)

173
rotary.py Normal file
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@ -0,0 +1,173 @@
# MIT License (MIT)
# Copyright (c) 2022 Mike Teachman
# https://opensource.org/licenses/MIT
# Platform-independent MicroPython code for the rotary encoder module
# Documentation:
# https://github.com/MikeTeachman/micropython-rotary
import micropython
_DIR_CW = const(0x10) # Clockwise step
_DIR_CCW = const(0x20) # Counter-clockwise step
# Rotary Encoder States
_R_START = const(0x0)
_R_CW_1 = const(0x1)
_R_CW_2 = const(0x2)
_R_CW_3 = const(0x3)
_R_CCW_1 = const(0x4)
_R_CCW_2 = const(0x5)
_R_CCW_3 = const(0x6)
_R_ILLEGAL = const(0x7)
_transition_table = [
# |------------- NEXT STATE -------------| |CURRENT STATE|
# CLK/DT CLK/DT CLK/DT CLK/DT
# 00 01 10 11
[_R_START, _R_CCW_1, _R_CW_1, _R_START], # _R_START
[_R_CW_2, _R_START, _R_CW_1, _R_START], # _R_CW_1
[_R_CW_2, _R_CW_3, _R_CW_1, _R_START], # _R_CW_2
[_R_CW_2, _R_CW_3, _R_START, _R_START | _DIR_CW], # _R_CW_3
[_R_CCW_2, _R_CCW_1, _R_START, _R_START], # _R_CCW_1
[_R_CCW_2, _R_CCW_1, _R_CCW_3, _R_START], # _R_CCW_2
[_R_CCW_2, _R_START, _R_CCW_3, _R_START | _DIR_CCW], # _R_CCW_3
[_R_START, _R_START, _R_START, _R_START]] # _R_ILLEGAL
_transition_table_half_step = [
[_R_CW_3, _R_CW_2, _R_CW_1, _R_START],
[_R_CW_3 | _DIR_CCW, _R_START, _R_CW_1, _R_START],
[_R_CW_3 | _DIR_CW, _R_CW_2, _R_START, _R_START],
[_R_CW_3, _R_CCW_2, _R_CCW_1, _R_START],
[_R_CW_3, _R_CW_2, _R_CCW_1, _R_START | _DIR_CW],
[_R_CW_3, _R_CCW_2, _R_CW_3, _R_START | _DIR_CCW],
[_R_START, _R_START, _R_START, _R_START],
[_R_START, _R_START, _R_START, _R_START]]
_STATE_MASK = const(0x07)
_DIR_MASK = const(0x30)
def _wrap(value, incr, lower_bound, upper_bound):
range = upper_bound - lower_bound + 1
value = value + incr
if value < lower_bound:
value += range * ((lower_bound - value) // range + 1)
return lower_bound + (value - lower_bound) % range
def _bound(value, incr, lower_bound, upper_bound):
return min(upper_bound, max(lower_bound, value + incr))
def _trigger(rotary_instance):
for listener in rotary_instance._listener:
listener()
class Rotary(object):
RANGE_UNBOUNDED = const(1)
RANGE_WRAP = const(2)
RANGE_BOUNDED = const(3)
def __init__(self, min_val, max_val, incr, reverse, range_mode, half_step, invert):
self._min_val = min_val
self._max_val = max_val
self._incr = incr
self._reverse = -1 if reverse else 1
self._range_mode = range_mode
self._value = min_val
self._state = _R_START
self._half_step = half_step
self._invert = invert
self._listener = []
def set(self, value=None, min_val=None, incr=None,
max_val=None, reverse=None, range_mode=None):
# disable DT and CLK pin interrupts
self._hal_disable_irq()
if value is not None:
self._value = value
if min_val is not None:
self._min_val = min_val
if max_val is not None:
self._max_val = max_val
if incr is not None:
self._incr = incr
if reverse is not None:
self._reverse = -1 if reverse else 1
if range_mode is not None:
self._range_mode = range_mode
self._state = _R_START
# enable DT and CLK pin interrupts
self._hal_enable_irq()
def value(self):
return self._value
def reset(self):
self._value = 0
def close(self):
self._hal_close()
def add_listener(self, l):
self._listener.append(l)
def remove_listener(self, l):
if l not in self._listener:
raise ValueError('{} is not an installed listener'.format(l))
self._listener.remove(l)
def _process_rotary_pins(self, pin):
old_value = self._value
clk_dt_pins = (self._hal_get_clk_value() <<
1) | self._hal_get_dt_value()
if self._invert:
clk_dt_pins = ~clk_dt_pins & 0x03
# Determine next state
if self._half_step:
self._state = _transition_table_half_step[self._state &
_STATE_MASK][clk_dt_pins]
else:
self._state = _transition_table[self._state &
_STATE_MASK][clk_dt_pins]
direction = self._state & _DIR_MASK
incr = 0
if direction == _DIR_CW:
incr = self._incr
elif direction == _DIR_CCW:
incr = -self._incr
incr *= self._reverse
if self._range_mode == self.RANGE_WRAP:
self._value = _wrap(
self._value,
incr,
self._min_val,
self._max_val)
elif self._range_mode == self.RANGE_BOUNDED:
self._value = _bound(
self._value,
incr,
self._min_val,
self._max_val)
else:
self._value = self._value + incr
try:
if old_value != self._value and len(self._listener) != 0:
_trigger(self)
except:
pass

76
rotary_irq_esp.py Normal file
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@ -0,0 +1,76 @@
# MIT License (MIT)
# Copyright (c) 2020 Mike Teachman
# https://opensource.org/licenses/MIT
# Platform-specific MicroPython code for the rotary encoder module
# ESP8266/ESP32 implementation
# Documentation:
# https://github.com/MikeTeachman/micropython-rotary
from machine import Pin
from rotary import Rotary
from sys import platform
_esp8266_deny_pins = [16]
class RotaryIRQ(Rotary):
def __init__(self, pin_num_clk, pin_num_dt, min_val=0, max_val=10, incr=1,
reverse=False, range_mode=Rotary.RANGE_UNBOUNDED, pull_up=False, half_step=False, invert=False):
if platform == 'esp8266':
if pin_num_clk in _esp8266_deny_pins:
raise ValueError(
'%s: Pin %d not allowed. Not Available for Interrupt: %s' %
(platform, pin_num_clk, _esp8266_deny_pins))
if pin_num_dt in _esp8266_deny_pins:
raise ValueError(
'%s: Pin %d not allowed. Not Available for Interrupt: %s' %
(platform, pin_num_dt, _esp8266_deny_pins))
super().__init__(min_val, max_val, incr, reverse, range_mode, half_step, invert)
if pull_up == True:
self._pin_clk = Pin(pin_num_clk, Pin.IN, Pin.PULL_UP)
self._pin_dt = Pin(pin_num_dt, Pin.IN, Pin.PULL_UP)
else:
self._pin_clk = Pin(pin_num_clk, Pin.IN)
self._pin_dt = Pin(pin_num_dt, Pin.IN)
self._enable_clk_irq(self._process_rotary_pins)
self._enable_dt_irq(self._process_rotary_pins)
def _enable_clk_irq(self, callback=None):
self._pin_clk.irq(
trigger=Pin.IRQ_RISING | Pin.IRQ_FALLING,
handler=callback)
def _enable_dt_irq(self, callback=None):
self._pin_dt.irq(
trigger=Pin.IRQ_RISING | Pin.IRQ_FALLING,
handler=callback)
def _disable_clk_irq(self):
self._pin_clk.irq(handler=None)
def _disable_dt_irq(self):
self._pin_dt.irq(handler=None)
def _hal_get_clk_value(self):
return self._pin_clk.value()
def _hal_get_dt_value(self):
return self._pin_dt.value()
def _hal_enable_irq(self):
self._enable_clk_irq(self._process_rotary_pins)
self._enable_dt_irq(self._process_rotary_pins)
def _hal_disable_irq(self):
self._disable_clk_irq()
self._disable_dt_irq()
def _hal_close(self):
self._hal_disable_irq()