usb-stack

# USB Stack Skill ## Overview This skill provides USB device and host stack implementation expertise for embedded systems, covering descriptor generation, device class implementation, and protocol debugging. ## Capabilities ### USB Descriptor Generation - Device descriptor configuration - Configuration descriptors - Interface descriptors - Endpoint descriptors - String descriptors - BOS descriptors (USB 3.x) ### Device Class Implementation - CDC (Communications Device Class) - HID (Human Interface Device) - MSC (Mass Storage Class) - DFU (Device Firmware Upgrade) - Audio class - Video class - Custom class implementation ### USB Stack Configuration - TinyUSB configuration - STM32 USB stack setup - NXP USB stack integration - Zephyr USB subsystem - Endpoint buffer management ### Enumeration and Debugging - Enumeration sequence debugging - Protocol analysis - USB analyzer integration - Descriptor validation - Compliance testing ### Advanced Features - Composite device configuration - USB power delivery - High-speed/full-speed selection - Isochronous transfers - Interrupt transfers - Bulk transfers ### DFU Implementation - DFU bootloader design - Runtime DFU mode - Detach and download - Upload capability - Manifest phase handling ## Target Processes - `device-driver-development.js` - USB driver implementation - `bootloader-implementation.js` - USB DFU bootloader - `hw-sw-interface-specification.js` - USB interface specification ## Dependencies - TinyUSB or vendor USB...