code: def coresight_write(self, reg, data, ap=True):
          
          ap = 1 if ap else 0
          res = self._dll.JLINKARM_CORESIGHT_WriteAPDPReg(reg, ap, data)
          if res < 0:
              raise errors.JLinkException(res)
          return res
docs: Writes an Ap/DP register on a CoreSight DAP.
  
          Note:
            ``coresight_configure()`` must be called prior to calling this method.
  
          Args:
            self (JLink): the ``JLink`` instance
            reg (int): index of DP/AP register to write
            data (int): data to write
            ap (bool): ``True`` if writing to an Access Port register, otherwise
              ``False`` for Debug Port
  
          Returns:
            Number of repetitions needed until write request accepted.
  
          Raises:
            JLinkException: on hardware error