随着红外探测器和图像处理技术的发展, 红外图像的分辨率和帧频越来越高, 红外图像的传输带宽越来越高。为了满足红外探测设备图像采集的需要, 设计了基于TI公司的DSP和Xilinx公司低成本FPGA开发的图像采集模块, FPGA通过HPI接口实现对DSP内存的访问, DSP通过EMAC接口配置管理以太网芯片, 实现千兆以太网传输功能。该模块具有高带宽、低成本、易于实现等特点, 满足当前红外探测设备图像采集的带宽要求。

With the development of infrared detector and image processing technology, the resolution and frame frequency of infrared images become higher and higher. Moreover, the transmission bandwidth of infrared images is increasing. In order to meet the needs for the image acquisition of infrared detection equipments, an image acquisition module based on the digital signal processing (DSP) of TI Inc. and the low-cost field programmable gate array (FPGA) of Xilinx is designed. In detail, FPGA achieves the access memory of DSP through the host port interface (HPI). The Ethernet chip is configured and managed by DSP through Ethernet media access controller (EMAC) interface to realize gigabit Ethernet transmission function. The module is characterized by high bandwidth but low cost and easy to implement, which can meet the bandwidth requirements of current infrared detection equipment image acquisition.