55 lines
2.1 KiB
ReStructuredText
55 lines
2.1 KiB
ReStructuredText
usbd_winusb
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===============
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本节主要介绍 winusb 驱动。winusb 是 windows 为了让用户友好的访问 USB 自定义类设备提供的一套通用驱动，其实本质就是 CDC ACM，只不过没有设置波特率的命令。
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WINUSB 版本根据 USB 版本分为 V1/V2 版本，V2 版本需要包含 BOS 描述符，V1 版本不需要。 **V2 版本需要在设备描述符中设置为 USB2.1 的版本号**。
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.. note:: 更换 winusb 描述符任意配置可能会枚举成功但是无法识别设备，需要删除 计算机\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\usbflags 下所有注册表项，重新插拔设备后生效。
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- V1 版本注册描述符
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.. code-block:: C
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const struct usb_descriptor winusbv1_descriptor = {
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.device_descriptor_callback = device_descriptor_callback,
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.config_descriptor_callback = config_descriptor_callback,
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.device_quality_descriptor_callback = device_quality_descriptor_callback,
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.string_descriptor_callback = string_descriptor_callback,
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.msosv1_descriptor = &msosv1_desc
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};
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OR
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usbd_msosv1_desc_register(busid, &msosv1_desc);
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- V2 版本注册描述符
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.. code-block:: C
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const struct usb_descriptor winusbv2_descriptor = {
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.device_descriptor_callback = device_descriptor_callback,
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.config_descriptor_callback = config_descriptor_callback,
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.device_quality_descriptor_callback = device_quality_descriptor_callback,
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.string_descriptor_callback = string_descriptor_callback,
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.msosv2_descriptor = &msosv2_desc,
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.bos_descriptor = &bos_desc,
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};
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OR
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usbd_bos_desc_register(busid, &bos_desc);
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usbd_msosv2_desc_register(busid, &msosv2_desc);
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- 接口描述符注册
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.. code-block:: C
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/* Interface 0 */
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USB_INTERFACE_DESCRIPTOR_INIT(0x00, 0x00, 0x02, 0xFF, 0x00, 0x00, 0x02),
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/* Endpoint OUT 2 */
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USB_ENDPOINT_DESCRIPTOR_INIT(WINUSB_OUT_EP, USB_ENDPOINT_TYPE_BULK, WINUSB_EP_MPS, 0x00),
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/* Endpoint IN 1 */
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USB_ENDPOINT_DESCRIPTOR_INIT(WINUSB_IN_EP, USB_ENDPOINT_TYPE_BULK, WINUSB_EP_MPS, 0x00),
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- 读写操作与 CDC ACM 相同，不再赘述 |