<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_clock(self, frequency):
 """Set the frequency for JTAG and SWD in Hz This function is safe to call before connect is called. """

        try:
            self._link.set_clock(frequency)
        except DAPAccess.Error as exc:
            six.raise_from(self._convert_exception(exc), exc)