Hi can someone help? I have tried all day to get some Mp code to run on a Raspberry pi 4b, 32 bit, current version.

I can't get past machine.Pin or use gpiozero, or Rpi.GPIO.

The code seems simple enough...

My aim is to generate a PWM interrupt as fast as the RP 4b can reasonably handle.

I'll provide two versions #1:
import time
import RPi.GPIO as GPIO

Define the maximum achievable PWM frequency in Hz

pwm_freq = 100000

Define the duty cycle (0-100)

duty_cycle = 50

Define the GPIO pin for the PWM output in BOARD mode

pwm_pin = 40

Set up the GPIO library to use board numbering mode

GPIO.setmode(GPIO.BOARD)

Configure the PWM output with the specified frequency and duty cycle

GPIO.setup(pwm_pin, GPIO.OUT)
pwm = GPIO.PWM(pwm_pin, pwm_freq)
pwm.start(duty_cycle)

Wait indefinitely

try:
while True:
time.sleep(1)
except KeyboardInterrupt:
pass
finally:
pwm.stop()
GPIO.cleanup()