AgentSkillsCN

connectivity-usb-can

Zephyr RTOS 的 USB 与 CAN 连接。涵盖 USB 设备栈的配置（CDC ACM、HID、MSC）、CAN 控制器的集成，以及包括缓冲与协议分组在内的专业 USB-to-CAN 适配器设计模式。在新增 USB 接口、实现 CAN 总线通信，或构建硬件诊断工具时，可触发此流程。

SKILL.md
--- frontmatter
name: connectivity-usb-can
description: USB and CAN connectivity for Zephyr RTOS. Covers USB device stack configuration (CDC ACM, HID, MSC), CAN controller integration, and professional USB-to-CAN adapter patterns including buffering and protocol packetization. Trigger when adding USB interfaces, implementing CAN bus communication, or building hardware diagnostic tools.

Zephyr Connectivity: USB & CAN

Build versatile hardware interfaces using Zephyr's modular USB device stack and robust CAN controller support.

Core Workflows

1. USB Device Stack

Configure and enable standard USB classes for host communication.

  • •Reference: usb_device_stack.md
  • •Key Tools: CONFIG_USB_DEVICE_STACK, usb_enable(), CDC ACM, HID.

2. USB-to-CAN Integration

Implement high-performance bridge patterns for CAN bus diagnostics and adapters.

  • •Reference: usb_to_can.md
  • •Key Tools: can_send(), k_msgq, binary packetization, CAN filtering.

Quick Start (USB CDC ACM)

kconfig
# prj.conf
CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_CDC_ACM=y
c
#include <zephyr/usb/usb_device.h>

void main(void) {
    usb_enable(NULL);
}

Professional Patterns (Adapter Design)

  • •Binary Protocols: Use established protocols like gs_usb for robust data transfer over the USB-to-CAN bridge.
  • •Hardware Filtering: Rely on the CAN controller's hardware filters to minimize CPU overhead from irrelevant bus traffic.
  • •Thread Safety: Use Zephyr's kernel IPCs (k_msgq, k_fifo) to safely move data between high-priority CAN interrupts and the USB processing thread.

Resources

  • •References:
    • •usb_device_stack.md: Configuring USB classes and descriptors.
    • •usb_to_can.md: Adapter patterns and buffering strategies.