创建一个UVC+HID兼容设备时HID不能发送报告

您好：当我创建一个UVC+HID兼容设备时，我遇到了一个问题。在完成UVC和HID枚举之后，主机在主机发送此命令时发出SET特征命令（内容：01 03、00、00、02、01、00、00）。命令之后，HID不能发送报告，但UVC正常工作。如果我启动UVC并在主机发送SET特征之前发送一个报告来启动HID，UVC和HID都正常工作。为什么？



     以下为原文
  Hello: When I create a UVC+HID compliant device, I encounter a problem. After the UVC and HID enumeration is completed, the host issues the SET FEATURE command (content: 01 03 00 00 02 01 00 00) when the host sends this. After the command, HID cannot send a report, but UVC works normally. If I start UVC and send a report to start HID before the host sends SET FEATURE, both UVC and HID are working properly. Why?