ESP32: PulseIn does not work (and it's weird too)

[0wwafa]

CircuitPython version

Adafruit CircuitPython 9.2.3 on 2025-01-17; ESP32 Devkit V1 with ESP32

Code/REPL

#If you save this as code.py and the run it on boot or soft boot, it will only show 0 and hitting control C will end with 0 (no pulses received)
import board,pulseio,digitalio,time
sense=digitalio.DigitalInOut(board.D14)
sense.direction=digitalio.Direction.INPUT
input("PRESS RETURN TO START\n")
sense.direction=digitalio.Direction.OUTPUT
p=pulseio.PulseIn(board.D13,1024,0)
print('0',len(p))
time.sleep(1)
print('1',len(p))
p=pulseio.PulseIn(board.D13,1024,1)
time.sleep(1)
print('2',len(p))

try:
  while True:
    while p:
      print(p.popleft())
    p=pulseio.PulseIn(board.D13,1024,0)
    time.sleep(0.01)

except KeyboardInterrupt:
  sense.direction=digitalio.Direction.INPUT
  print(len(p))
  p.deinit()
  sense.deinit()
  print("program ended.")
  pass

except Exception as e:
  sense.direction=digitalio.Direction.INPUT
  p.deinit()
  sense.deinit()
  print("program ended because of ",e)



# but if you run this in the REPL, it gets pulses (a hundred in my case, even if the source is continuously sending pulses for test)

>>> p=pulseio.PulseIn(board.D13,1024,0)
>>> len(p)
100

after that p does not "grow" I have to run again p=pulseio.PulseIn(board.D13,1024,0) in the REPL
and even if I wait a long time, I get 100-120 pulses.
(the source is continuously sending pulses with variable lengths between 40 and 520 microseconds!)

Behavior

explained above.

Description

No response

Additional information

No response