基于以太网传输的嵌入式多核DSP自启引导

Bootloader of Embedded Muti-core DSP Based on Ethernet

TI推出的基于Key Stone架构的TMS320C66xx系列产品在图像处理、语音处理、信号处理等诸多领域得到了广泛应用,多核自启引导关系到DSP内核代码之间能否在离线模式下同步并行工作和独立自主运行。结合以太网接口的高速传输特性和NAND FLASH大容量非易失存储优势,通过在FLASH烧写程序中嵌入UDP协议代码实现多核镜像文件的以太网传输功能,并且对IBL二级自启引导代码进行改进,实现了多核镜像文件从FLASH到内核的引导。经过在TMS320C6670 DSP平台上验证,该设计能够实现多核程序代码到FLASH的高效传输、烧写和自启引导,为嵌入式DSP设备出厂制造和程序升级提供了新的思路。

A series of TMS320C66xx DSPs from TI, based on KeyStone, are widely used in fields of image processing, signal processing and speech processing. The multi - core DSP boot load affects operation between kernel code, sync parallel and independently run in offline mode. In this paper, combined with high - speed Ethernet interface transmission characteristics and high capacity NAND FLASH nonvolatile storage advantage, the multi - core image files from Ethernet are received by embedding UDP protocol to FLASH programmer procedures, and the multi - core image files are loaded from the FLASH to the kernel by improving IBL boot code. The proof on the TMS320C6670 DSP platform shows that it enables efficient transmission of multi - core code to FLASH and provides a new thinking for embedded DSP device in factory manufacture and upgrade field.