增强型直接内存存取(EDMA)是数字信号处理器(DSP)中用于快速数据交换的重要技术，具有独立于CPU的后台批量数据传输的能力，能够满足实时图像处理中高速数据传输的要求。以TI公司的TMS320DM642型DSP为例，介绍EDMA控制器的特点。结合实例给出EDMA在图像数据实时传输中的具体控制和实现方法。-Enhanced direct memory access (EDMA) is a digital signal processor (DSP) for fast data exchange in an important technology, independent of the CPU with the background bulk data transmission capability to meet the real-time image processing in high-speed data transmission requirements . To TI s DSP-based TMS320DM642 as an example, the EDMA controller characteristics. EDMA examples given in the image data in real-time transmission control and the achievement of specific methods.