Detect if a floppy drive has had a disk inserted/removed, by monitoring the pin34 (/DSKCHG) line

detect_floppy_insertion.py

import subprocess,time,sys
from greaseweazle.tools import util
from greaseweazle import error
from greaseweazle import usb as USB
from greaseweazle.flux import Flux

DEVICE=None
DRIVE=util.Drive()('2')

import time
from contextlib import contextmanager

@contextmanager
def report_duration(do_what=None):
	now = time.time()
	try:
		yield
	finally:
		if do_what is None:
			do_what='run'
		print(f'it took {time.time() - now:0.2f}s to {do_what}')

def noclick_step(usb: USB.Unit) -> None:
	usb._send_cmd(struct.pack("2B", USB.Cmd.NoClickStep, 2))

def seek():
	try:
		usb = util.usb_open(DEVICE)
		util.with_drive_selected((lambda:usb.noclick_step()), usb, DRIVE,
								 motor=False)
	except USB.CmdError as err:
		print("Command Failed: %s" % err)

class pin_reader:
	def __init__(self,usb,pin):
		self.usb = usb
		self.pin = pin
		self.value = None
	def __call__(self):
		self.value = self.usb.get_pin(self.pin)

def read_pin(pin):
	try:
		usb = util.usb_open(DEVICE)
		pinr = pin_reader(usb, 34)
		util.with_drive_selected(pinr, usb, DRIVE,motor=False)
		return pinr.value
	except USB.CmdError as error:
		print("Command Failed: %s" % error)

def bread_pin(pin):
	ret=gw('pin','get',pin)
	return b'Low' not in ret

def read34():
	return read_pin(34)

def monitor_pins():
	last_status=read34()
	while True:
		#with report_duration('check for floppy'):
			seek()
			status=read34()
			if status!=last_status:
				if status:
					print('Floppy detected! YAAAAY! ^_^')
				else:
					print('No more floppy. I feel so empty ;_;')
				last_status=status

if __name__=='__main__':
	#wait_for_floppy()
	monitor_pins()