59 lines
1.8 KiB
Python
59 lines
1.8 KiB
Python
import time
|
|
from machine import Pin
|
|
from pimoroni import Analog, AnalogMux, Button
|
|
from plasma import WS2812
|
|
from servo import servo2040
|
|
|
|
"""
|
|
Show how to read the 6 external sensors and
|
|
display their values on the neighbouring LEDs.
|
|
|
|
Press "Boot" to exit the program.
|
|
|
|
NOTE: Plasma WS2812 uses the RP2040's PIO system, and as
|
|
such may have problems when running code multiple times.
|
|
If you encounter issues, try resetting your board.
|
|
"""
|
|
|
|
BRIGHTNESS = 0.4 # The brightness of the LEDs
|
|
UPDATES = 50 # How many times to update LEDs and Servos per second
|
|
|
|
# Set up the shared analog inputs
|
|
sen_adc = Analog(servo2040.SHARED_ADC)
|
|
|
|
# Set up the analog multiplexer, including the pin for controlling pull-up/pull-down
|
|
mux = AnalogMux(servo2040.ADC_ADDR_0, servo2040.ADC_ADDR_1, servo2040.ADC_ADDR_2,
|
|
muxed_pin=Pin(servo2040.SHARED_ADC))
|
|
|
|
# Set up the sensor addresses and have them pulled down by default
|
|
sensor_addrs = list(range(servo2040.SENSOR_1_ADDR, servo2040.SENSOR_6_ADDR + 1))
|
|
for addr in sensor_addrs:
|
|
mux.configure_pull(addr, Pin.PULL_DOWN)
|
|
|
|
# Create the LED bar, using PIO 1 and State Machine 0
|
|
led_bar = WS2812(servo2040.NUM_LEDS, 1, 0, servo2040.LED_DATA)
|
|
|
|
# Create the user button
|
|
user_sw = Button(servo2040.USER_SW)
|
|
|
|
# Start updating the LED bar
|
|
led_bar.start()
|
|
|
|
|
|
# Read sensors until the user button is pressed
|
|
while user_sw.raw() is not True:
|
|
|
|
# Read each sensor in turn and print its voltage
|
|
for i in range(len(sensor_addrs)):
|
|
mux.select(sensor_addrs[i])
|
|
sensor_voltage = sen_adc.read_voltage()
|
|
|
|
# Calculate the LED's hue, with Green for high voltages and Blue for low
|
|
hue = (2.0 - (sensor_voltage / 3.3)) * 0.333
|
|
led_bar.set_hsv(i, hue, 1.0, BRIGHTNESS)
|
|
|
|
print("S", i + 1, " = ", round(sensor_voltage, 3), sep="", end=", ")
|
|
print()
|
|
|
|
time.sleep(1.0 / UPDATES)
|