def tofile(self, fobj, format):
        """Write data to hex or bin file. Preferred method over tobin or tohex.

        @param  fobj        file name or file-like object
        @param  format      file format ("hex" or "bin")
        """
        if format == 'hex':
            self.write_hex_file(fobj)
        elif format == 'bin':
            self.tobinfile(fobj)
        else:
            raise ValueError('format should be either "hex" or "bin";'
                ' got %r instead' % format)
Write data to hex or bin file. Preferred method over tobin or tohex.

        @param  fobj        file name or file-like object
        @param  format      file format ("hex" or "bin")