28335的DMA 操作 及ADC.pdf

Increasing Data Throughput Using the New C2000 DMA Overview of the TMS320F2833x DMA SPRP743 1 Agenda F2833x Block Diagram/Overview Channel Capabilities State Machine Address Control Other Features/Register Descriptions Examples SPRP743 2 Agenda F2833x Block Diagram/Overview Channel Capabilities State Machine Address Control Other Features/Register Descriptions Examples SPRP743 3 Why DMA for Control? • Reduce ADC overhead, e.g., bar-code readers, data acquisition • Processing of external data, e.g. FFT on external data • Binning ADC data • Data logging and communication via McBSP • Transposing of matrices, e.g., power system monitoring • Any block data transfers SPRP743 4 F2833x DMA Overview • Event driven state machine • 6 channels can be configured to accept any DMA source • Transfers split up into smaller bursts • Flexible automated address manipulation • 16 bit or 32 bit word transfers • Fully configurable SPRP743 5 F2833x DMA Block Diagram CPU Bus ADC I INT7 CPU A N 6 channels w/ PF0 ADC D T s ADC l s r X I/F Control C E a t e