Texas Instruments TMS320 DSP manual Use of the DMA Resource, Submitting DMA Transfer Requests

Chapter 6

SPRU352G – June 2005 – Revised February 2007

Use of the DMA Resource

The direct memory access (DMA) controller performs asynchronously scheduled data transfers in the background while the CPU continues to execute instructions. In this chapter, we develop additional rules and guidelines for creating eXpressDSP-compliant algorithms that utilize the DMA resources.

Topic		Page
6.1	Overview	62
6.2	Algorithm and Framework	62
6.3	Requirements for the Use of the DMA Resource	63
6.4	Logical Channel	63
6.5	Data Transfer Properties	64
6.6	Data Transfer Synchronization	64
6.7	Abstract Interface	65
6.8	Resource Characterization	66
6.9	Runtime APIs	67
6.10	Strong Ordering of DMA Transfer Requests	67
6.11	Submitting DMA Transfer Requests	68
6.12	Device Independent DMA Optimization Guideline	68
6.13	C6xxx Specific DMA Rules and Guidelines	69
6.14	C55x Specific DMA Rules and Guidelines	70
6.15	Inter-Algorithm Synchronization	71

SPRU352G –June 2005 –Revised February 2007 Use of the DMA Resource 61

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