WIN7下USB多点触摸，一次发多个数据包的延迟问题，重要！

    /* 27 */
    0x07,          /*bLength: Endpoint Descriptor size*/
    USB_ENDPOINT_DESCRIPTOR_TYPE, /*bDescriptorType:*/

    0x81,          /*bEndpointAddress: Endpoint Address (IN)*/
    0x03,          /*bmAttributes: Interrupt endpoint*/
     0x0e ,          /*wMaxPacketSize: 14 Byte max */
    0x00,
    0x01,          /*bInterval: Polling Interval (32 ms)*/
    /* 34 */
  }

 else //其它包，设置为0
            {
                    delay_us(500);
                 ReportBuf[13] = 0;
            }