phyduino/01_basics/analog_read_serial/main.py

Reads all six analogue pins as 12-bit codes (0-4095), twice a second.

A0-A2: 0 = 0 V, 4095 = 3.3 V (RP2040 ADC). A3-A5: 0 = 0 V, 4095 = 2.048 V (on-board MAX11635 ADC).

Wiring

Connect a potentiometer wiper (ends on GND and 3.3 V) to any pin to see it change; keep A3-A5 at or below 2.048 V. Unconnected pins drift.

Output

A0=2048  A1=   3  A2=   0  A3=2048  A4=   0  A5=   0

# Reads all six analogue pins as 12-bit codes (0-4095), twice a second.
#
# A0-A2: 0 = 0 V, 4095 = 3.3 V (RP2040 ADC).
# A3-A5: 0 = 0 V, 4095 = 2.048 V (on-board MAX11635 ADC).
# Connect a potentiometer wiper (ends on GND and 3.3 V) to any pin to see it
# change; keep A3-A5 at or below 2.048 V. Unconnected pins drift.
 
import time  # sleep() for pauses
 
import phyduino as mcu  # the Phyduino Pico library, used as mcu.<name>
 
NAMES = ("A0", "A1", "A2", "A3", "A4", "A5")  # the pins to read, in order
 
while True:  # repeats until stopped: Interrupt in PyCharm, or mpremote soft-reset
    # Read each pin and print them on one line, e.g. "A0=2048  A1=   3 ...".
    # "%s=%4d" puts the name, then the reading right-aligned in 4 characters.
    print("  ".join("%s=%4d" % (name, mcu.analog_read(name)) for name in NAMES))
    time.sleep(0.5)  # wait half a second before the next line