Platform-Agnostic Recovery: SnagFactory's Hardware Abstraction for Device Flashing

Flashing bootloaders and firmware images is an important step in embedded device manufacturing, but the process is often dependent on vendor-specific tools that are difficult to reuse across different hardware platforms. SnagFactory provides an open-source framework for device recovery and flashing. However, supporting modern RTOS-based systems is still challenging. This is because multi-stage boot flows involve bootloaders, system firmware, and sometimes Linux images.

In this talk, we present our work on integrating SnagFactory with the Texas Instruments MCU+ SDK to simplify the flashing process for Sitara platforms. We developed a modular architecture that automates the generation of flashing artifacts from platform configuration files, leveraging USB DFU (Device Firmware Upgrade) protocol for device recovery and Fastboot protocol for high-speed image transfer. Unlike traditional UART-based flashing limited to ~115 kbps bandwidth, our USB DFU and Fastboot protocols deliver 40-100+ Mbps throughput, enabling faster bootloader loading and firmware image transfer. This automation reduces flashing time, minimizes configuration errors, and makes the workflow easier to maintain.

The session will cover the complete recovery and flashing flow, including configuration generation, device recovery, flashing, and validation. We will also demonstrate how the framework supports multiple storage devices, boot modes, and security variants through a configuration-driven approach. By keeping the workflow independent of platform-specific implementation, Snagfactory makes it easier to support new devices without major changes, providing a flexible and open-source solution for embedded manufacturing.