USB_HID_ERR_DESC_PARSE embedded protocol_error ai_generated true

USB HID：报告描述符在第12字节处解析失败

USB HID: Report descriptor parsing failed at byte 12

ID: embedded/usb-hid-descriptor-parsing-error

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80%修复率
87%置信度
1证据数
2024-03-05首次发现

版本兼容性

版本状态引入弃用备注
USB HID class driver v2.5.0 active — — —
TinyUSB v0.15.0 active — — —

根因分析

HID报告描述符包含意外或格式错误的标签，例如短项的大小字段无效。

English

The HID report descriptor contains an unexpected or malformed tag, such as a short item with an invalid size field.

generic

官方文档

https://www.usb.org/document-library/hid-usage-tables-12

解决方案

  1. Validate the HID report descriptor using a tool like HID Descriptor Tool, then correct the binary: ensure all items have proper lengths (e.g., `0x05 0x01` for Usage Page, not `0x05 0x01 0x00`)
  2. Add a fallback descriptor in firmware that skips malformed items: `if (desc_byte == 0xFE) { skip_item(); } else { parse_item(); }`

无效尝试

常见但无效的做法:

  1. 95% 失败

    Buffer size does not affect descriptor parsing; the error is due to invalid content, not insufficient memory.

  2. 99% 失败

    Optimization levels do not change the binary content of the descriptor; parsing logic remains the same.