add a function to wait until osci finished the momentary measurement

[ediordna]

Consider adding a function to wait until osci stopped its measurement:

    def wait_until_stopped(self, max_seconds=20, warn=True):
        '''Queries for the running status of run-control until the osci is in state stopped.
        Does this for a maximum number of seconds, afterwards it leaves the function to not query
        forever.

        :param max_seconds: define how long to wait max, defaults to 20
        :type max_seconds: int or str, optional
        :param warn: decide, if a warning shall be logged after time is over, defaults to True
        :type warn: bool
        :return: if it stopped after condition change or after maximum number of seconds
        :rtype: bool
        '''
        # Wait a maximum number of seconds to prevent looping forever
        for i in range(int(max_seconds)):
            try:
                operation_register = int(self.query_raw(':OPERegister:CONDition?'))
            except VisaIOError:
                time.sleep(1)
                continue
            # We need the value from bit 3 of operation register
            # It tells us if the oscilloscope is running (not stopped)
            running = bool((operation_register >> 3) & 1)
            if not running:
                logger.info(f'Osci: Stopped after {i} seconds.')
                return True
            time.sleep(1)
        if warn:
            logger.warn(f'Osci: Waited {max_seconds}s to switch to status "stop", did not work.')
        return False