EDMA在实时图像处理系统中的应用

Application of EDMA in real-time image processing

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。实验结果表明,通过灵活控制EDMA不仅能够提高图像数据的传输效率,而且能够充分发挥DSP的高速性能。

The enhanced direct memory access（EDMA） is an important technology used for fast speed data transfer in data signal processor （DSP）.EDMA is able to move data block independent of CPU, and this capability meets real-time image processing. The DSP（TMS320DM642）is taken as an example,EDMA controller characteristic is introduced.According to EDMA application in real-time image processing, the specific control ways and realization steps are given out.The research result shows that the flexible control EDMA can not only raise image data transfer effficiency,but also improve DSP speed.