def delete_usb_serial(timeout=1):
usb.disable()
usb.uninit()
start_us = clock.gettime_us(clock.CLOCK_MONOTONIC)
now_us = start_us
timeout_us = timeout * 1000000
while glob_file(dev_pattern_usb) is not None and (now_us - start_us) < timeout_us:
now_us = clock.gettime_us(clock.CLOCK_MONOTONIC)
time.sleep(0.001)
end_us = clock.gettime_us(clock.CLOCK_MONOTONIC)
if glob_file(dev_pattern_usb) is None:
logger.debug("%s deleted in %0.3f sec",
dev_pattern_usb, (end_us - start_us) / 1000000.0)
return True
else:
logger.error("deleting device %s", dev_pattern_usb)
return False
def create_usb_serial(timeout=5):
usb.init()
usb.enable()
start_us = clock.gettime_us(clock.CLOCK_MONOTONIC)
now_us = start_us
timeout_us = timeout * 1000000
while glob_file(dev_pattern_usb) is None and (now_us - start_us) < timeout_us:
now_us = clock.gettime_us(clock.CLOCK_MONOTONIC)
time.sleep(0.001)
end_us = clock.gettime_us(clock.CLOCK_MONOTONIC)
dev_name = glob_file(dev_pattern_usb)
if os.path.exists(dev_name):
logger.info("%s created in %0.3f sec",
dev_name, (end_us - start_us) / 1000000.0)
else:
logger.info("error creating %s", dev_pattern_usb)
usb.disable()
usb.uninit()
return dev_name