viernes, 8 de noviembre de 2024

Led Blink PICO W - Raspberry Pico W - LED = Pin("WL_GPIO0", Pin.OUT), LED light not turning on, Pin 25 not more in Pico W "WL_GPIO0"


https://raspberrypi.stackexchange.com/questions/140413/led-light-not-turning-on

 Blinking onboard LED

(1) For Pico W, the pin number for on board Led is "WL_GPIO0".

Yes, no longer number 25 for Pico.

(2) The following program blinks onboard LED. The correct statement to initialize the Led should be:

LED = Pin("WL_GPIO0", Pin.OUT)

Update: The following also looks OK:

LED = Pin("LED", Pin.OUT)

There is some confusion here: the first LED is an object, the second is the pin number for the onboard pin (same of WL+GPIO0) (Appendix H)

(3) Full listing of the folly debugged program:


# Name      - Rpi Pico W onboard LED v4.3  tlfong01  2022dec29hkt1502
# Function  - Blink onboard LED
# References -
#   (1) Blink onboard LED  https://projects.raspberrypi.org/en/projects/getting-started-with-the-pico/5
#   (2) Onboard LED pinout https://core-electronics.com.au/guides/raspberry-pi-pico/raspberry-pi-pico-w-overview-features-specs/

import machine
from machine import Pin, Timer
timer = Timer()

LED = Pin("WL_GPIO0", Pin.OUT)

def blink(timer):
    LED.toggle()
    
timer.init(freq = 1, mode = Timer.PERIODIC, callback = blink)

Appendix C - Blink GPIO Pin 15 Led

# Rpi Pico W Blink GPIO 15 LED v8.0  tlfong01  2022dec29hkt2022

# *** Import modules ***
import machine
from machine import Pin, Timer

# *** Create objects ***
timer02    = Timer()
gp15LedPin = Pin(15, Pin.OUT)

# *** Define functions ***
def blinkGp15Led(dummy):
    gp15LedPin.toggle()
    return

# *** Blink GP15 Led ***

timer02.init(freq = 2, mode = Timer.PERIODIC, callback = blinkGp15Led)

# *** End of program ***

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