dmae.rpl is the system library that provides DMA (Direct Memory Access) functions.
Functions
In the context of the DMAE library; timestamps (as OSTimes) are used to identify operations. They can be used with DMAEWaitDone for synchronisation.
Timing
| Prototype
|
Description
|
OSTime DMAEGetRetiredTimeStamp();
|
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OSTime DMAEGetLastSubmittedTimeStamp();
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Returns the last timestamp submitted to the DMAE engine, as an OSTime.
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bool DMAEWaitDone(OSTime timestamp);
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Wait until a given DMA operation is complete.
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void DMAESetTimeout(unsigned int timeout);
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Set the timeout for DMA operations.
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unsigned int DMAEGetTimeout();
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Gets the current timeout for DMA operations.
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Operations
| Prototype
|
Description
|
OSTime DMAECopyMem(void* dst, void* src, size_t numDwords, DMAEEndianSwapMode endian);
|
Uses DMA to copy memory from one location to another. Note numDwords - the size should be given as bytes / 4.
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OSTime DMAEFillMem(void* dst, unsigned int value, size_t numDwords);
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Uses DMA to fill memory with a given value. Again, note numDwords.
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Enums
| Name
|
Definition
|
| DMAEEndianSwapMode
|
typedef enum DMAEEndianSwapMode {
NONE = 0,
SWAP_8_IN_16 = 1,
SWAP_8_IN_32 = 2,
} DMAEEndianSwapMode; |
See Also
Decaf's implementation of the DMAE lib (source for this page)