Micropython/micropython at main · alexphobby/Micropython · GitHub

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PIN:
from machine import Pin
p0 = Pin(0, Pin.OUT)    # create output pin on GPIO0
p0.on()                 # set pin to "on" (high) level
p0.off()                # set pin to "off" (low) level
p0.value(1)             # set pin to on/high

p2 = Pin(2, Pin.IN)     # create input pin on GPIO2
print(p2.value())       # get value, 0 or 1

p4 = Pin(4, Pin.IN, Pin.PULL_UP) # enable internal pull-up resistor
p5 = Pin(5, Pin.OUT, value=1) # set pin high on creation


GPIO:

import rp2

@rp2.asm_pio(set_init=rp2.PIO.OUT_LOW)
def blink_1hz():
    # Cycles: 1 + 7 + 32 * (30 + 1) = 1000
    set(pins, 1)
    set(x, 31)                  [6]
    label("delay_high")
    nop()                       [29]
    jmp(x_dec, "delay_high")

    # Cycles: 1 + 7 + 32 * (30 + 1) = 1000
    set(pins, 0)
    set(x, 31)                  [6]
    label("delay_low")
    nop()                       [29]
    jmp(x_dec, "delay_low")

# Create and start a StateMachine with blink_1hz, outputting on Pin(25)
sm = rp2.StateMachine(0, blink_1hz, freq=2000, set_base=Pin(25))
sm.active(1)


ADC:
RP2040 has five ADC channels in total, four of which are 12-bit SAR based ADCs: GP26, GP27, GP28 and GP29. The input signal for ADC0, ADC1, ADC2 and ADC3 can be connected with GP26, GP27, GP28, GP29 respectively (On Pico board, GP29 is connected to VSYS). The standard ADC range is 0-3.3V. The fifth channel is connected to the in-built temperature sensor and can be used for measuring the temperature.
ADC Module 	GPIO Pins
ADC0 	GP26
ADC1 	GP27
ADC2 	GP28

Use the machine.ADC class:

from machine import ADC, Pin
adc = ADC(Pin(26))     # create ADC object on ADC pin
adc.read_u16()         # read value, 0-65535 across voltage range 0.0v - 3.3v


i2C:

from machine import Pin, I2C

i2c = I2C(0)   # default assignment: scl=Pin(9), sda=Pin(8)
i2c = I2C(1, scl=Pin(3), sda=Pin(2), freq=400_000)


PWM:

from machine import Pin, PWM
from time import sleep

pwm = PWM(Pin(15))
pwm.freq(1000)
pwm.duty_u16(duty)


Intrrupt

nrf_int.irq(trigger=0)
nrf_int = Pin(16, machine.Pin.IN) #,machine.Pin.PULL_DOWN
nrf_int.irq(trigger=Pin.IRQ_FALLING, handler=nrf_action) #nrf_action = functie