コード例 #1
0
/**
 * \brief Device enumeration step 5
 * Requests the USB device descriptor.
 * This setup request can be aborted
 * because the control endpoint size is unknown.
 */
static void uhc_enumeration_step5(void)
{
	usb_setup_req_t req;

	req.bmRequestType = USB_REQ_RECIP_DEVICE|USB_REQ_TYPE_STANDARD|USB_REQ_DIR_IN;
	req.bRequest = USB_REQ_GET_DESCRIPTOR;
	req.wValue = (USB_DT_DEVICE << 8);
	req.wIndex = 0;
	req.wLength = offsetof(uhc_device_t, dev_desc.bMaxPacketSize0)
			+ sizeof(uhc_dev_enum->dev_desc.bMaxPacketSize0);

	// After a USB reset, the reallocation is required
	uhd_ep_free(0, 0);
	if (!uhd_ep0_alloc(0, 64)) {
		uhc_enumeration_error(UHC_ENUM_HARDWARE_LIMIT);
		return;
	}
	if (!uhd_setup_request(0,
			&req,
			(uint8_t*)&uhc_dev_enum->dev_desc,
			sizeof(usb_dev_desc_t),
			NULL,
			uhc_enumeration_step6)) {
		uhc_enumeration_error(UHC_ENUM_MEMORY_LIMIT);
		return;
	}
}
コード例 #2
0
ファイル: uhc.c プロジェクト: dinchak/aleph
/**
 * \brief Device enumeration step 11
 * Updates USB host pipe with the new USB address.
 * Requests a complete USB device descriptor.
 */
static void uhc_enumeration_step11(void)
{
  usb_setup_req_t req;

  // Free address 0 used to start enumeration
  uhd_ep_free(0, 0);

  // Alloc control endpoint with the new USB address
  if (!uhd_ep0_alloc(UHC_DEVICE_ENUM_ADD,
		     uhc_dev_enum->dev_desc.bMaxPacketSize0)) {
    uhc_enumeration_error(UHC_ENUM_HARDWARE_LIMIT);
    return;
  }
  // Send USB device descriptor request
  req.bmRequestType = USB_REQ_RECIP_DEVICE|USB_REQ_TYPE_STANDARD|USB_REQ_DIR_IN;
  req.bRequest = USB_REQ_GET_DESCRIPTOR;
  req.wValue = (USB_DT_DEVICE << 8);
  req.wIndex = 0;
  req.wLength = sizeof(usb_dev_desc_t);
  if (!uhd_setup_request(UHC_DEVICE_ENUM_ADD,
			 &req,
			 (uint8_t *) & uhc_dev_enum->dev_desc,
			 sizeof(usb_dev_desc_t),
			 NULL, uhc_enumeration_step12)) {
    uhc_enumeration_error(UHC_ENUM_MEMORY_LIMIT);
    return;
  }
}
コード例 #3
0
ファイル: uhc.c プロジェクト: InSoonPark/asf
/**
 * \brief Device enumeration step 9
 * Send a Set address setup request.
 */
static void uhc_enumeration_step9(void)
{
	usb_setup_req_t req;

	req.bmRequestType = USB_REQ_RECIP_DEVICE
			| USB_REQ_TYPE_STANDARD | USB_REQ_DIR_OUT;
	req.bRequest = USB_REQ_SET_ADDRESS;
#ifdef USB_HOST_HUB_SUPPORT
	uint8_t usb_addr_free = 0;
	uhc_device_t *dev;

	// Search free address
	dev = &g_uhc_device_root;
	while (usb_addr_free++) {
		if (dev->address == usb_addr_free) {
			continue;
		}
		if (dev->next != NULL) {
			dev = dev->next;
			continue;
		}
		break;
	}
	req.wValue = usb_addr_free;
	uhc_dev_enum->address = usb_addr_free;
#else
	req.wValue = UHC_DEVICE_ENUM_ADD;
	uhc_dev_enum->address = UHC_DEVICE_ENUM_ADD;
#endif
	req.wIndex = 0;
	req.wLength = 0;

	// After a USB reset, the reallocation is required
	uhd_ep_free(0, 0);
	if (!uhd_ep0_alloc(0, uhc_dev_enum->dev_desc.bMaxPacketSize0)) {
		uhc_enumeration_error(UHC_ENUM_HARDWARE_LIMIT);
		return;
	}

	if (!uhd_setup_request(0,
			&req,
			(uint8_t*)&uhc_dev_enum->dev_desc,
			sizeof(usb_dev_desc_t),
			NULL,
			uhc_enumeration_step10)) {
		uhc_enumeration_error(UHC_ENUM_MEMORY_LIMIT);
		return;
	}
}