embedded protocol_error ai_generated true

USB HID：端点0x81停滞，需要主机复位

USB HID: endpoint 0x81 stalled, host reset required

ID: embedded/usb-hid-endpoint-stall

其他格式: JSON · Markdown 中文 · English
80%修复率
87%置信度
1证据数
2024-07-08首次发现

版本兼容性

版本状态引入弃用备注
USB HID v1.11 active — — —
STM32 USB Device Library v2.6.0 active — — —
TinyUSB v0.15.0 active — — —

根因分析

USB HID端点因协议违规而停滞（例如，报告大小不匹配、无效的报告ID或主机发送不支持请求）。

English

USB HID endpoint stalled due to protocol violation (e.g., report size mismatch, invalid report ID, or host sending unsupported request).

generic

官方文档

https://www.usb.org/document-library/device-class-definition-hid-111

解决方案

  1. Verify HID report descriptor matches the actual report size sent. Use a USB analyzer (e.g., Wireshark with usbmon) to capture host requests and ensure firmware responds correctly.
  2. Implement a callback to clear endpoint stall on host request (e.g., ClearFeature(ENDPOINT_HALT)). In STM32 USB stack, override USBD_HID_SetupStage.

无效尝试

常见但无效的做法:

  1. Re-enumerate the device by power-cycling the USB cable 70% 失败

    The stall condition persists because the firmware does not clear the endpoint halt condition; enumeration alone does not fix the logic error.

  2. Increase USB buffer size to accommodate larger reports 85% 失败

    Stall is caused by protocol mismatch, not buffer overflow; larger buffers do not resolve incorrect report descriptors.

  3. Disable endpoint halt in firmware unconditionally 60% 失败

    Forces data transfer but may cause host-side timeout or data corruption if the report format is still invalid.