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WinUSB Device
=================
This section mainly introduces the winusb driver. Winusb is a general driver provided by Windows to allow users to access USB custom class devices in a user-friendly manner. It is essentially CDC ACM, but without baud rate setting commands.
WINUSB versions are divided into V1/V2 versions according to USB versions. V2 version requires BOS descriptor, while V1 version does not. **V2 version requires setting USB2.1 version number in device descriptor**.
.. note:: Changing any winusb descriptor configuration may result in successful enumeration but inability to recognize the device. You need to delete all registry entries under Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\usbflags, then unplug and replug the device to take effect.
- V1 version descriptor registration
.. code-block:: C
const struct usb_descriptor winusbv1_descriptor = {
.device_descriptor_callback = device_descriptor_callback,
.config_descriptor_callback = config_descriptor_callback,
.device_quality_descriptor_callback = device_quality_descriptor_callback,
.string_descriptor_callback = string_descriptor_callback,
.msosv1_descriptor = &msosv1_desc
};
OR
usbd_msosv1_desc_register(busid, &msosv1_desc);
- V2 version descriptor registration
.. code-block:: C
const struct usb_descriptor winusbv2_descriptor = {
.device_descriptor_callback = device_descriptor_callback,
.config_descriptor_callback = config_descriptor_callback,
.device_quality_descriptor_callback = device_quality_descriptor_callback,
.string_descriptor_callback = string_descriptor_callback,
.msosv2_descriptor = &msosv2_desc,
.bos_descriptor = &bos_desc,
};
OR
usbd_bos_desc_register(busid, &bos_desc);
usbd_msosv2_desc_register(busid, &msosv2_desc);
- Interface descriptor registration
.. code-block:: C
/* Interface 0 */
USB_INTERFACE_DESCRIPTOR_INIT(0x00, 0x00, 0x02, 0xFF, 0x00, 0x00, 0x02),
/* Endpoint OUT 2 */
USB_ENDPOINT_DESCRIPTOR_INIT(WINUSB_OUT_EP, USB_ENDPOINT_TYPE_BULK, WINUSB_EP_MPS, 0x00),
/* Endpoint IN 1 */
USB_ENDPOINT_DESCRIPTOR_INIT(WINUSB_IN_EP, USB_ENDPOINT_TYPE_BULK, WINUSB_EP_MPS, 0x00),
- Read and write operations are the same as CDC ACM, no further elaboration
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