【摘要】 直接内存存取(DMA)是数字信号处理器(DSP)中用于快速数据交换的重要技术,它具有独立于CPU的后台批量数据传输能力,能够满足实时图像处理中高速数据传输要求。以TI公司的TMS320C6201DSP芯片为例,介绍了DMA控制器的特点。结合实例,给出DMA在图像数据实时传输中的一种具体控制和实现方法。实验结果表明,通过灵活地控制DMA,不仅能够提高图像数据的传输效率,而且能够充分地发挥DSP的高速性能。更多还原

【Abstract】 Direct memory access(DMA)is an important technology used for fast speed data transfer in data signal processor(DSP). DMA is able to move data block independent of CPU, and this capability meets real time image processing. TMS320C6201 DSP is taken as an example, and DMA controller characteristic is introduced. According to DMA application in realtime image processing, the specific control ways and realization steps are given out. The research result shows that the flexible control DMA can not only raise image data transfer efficiency but also improve DSP speed.更多还原