The DMA is configured to respond to sync events from peripherals – i. Refer Table from the TRM below:. Typically the best throughput we can get from EDMA would depend on the max. Similar to linking, but rather than reloading the same channel, another channel is triggered to run. This page was last modified on 27 June , at What happens when the transfer completes? Navigation menu Personal tools Log in Request account.
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There are two main differences between A-sync and AB-sync: Much time was spent working through each example and learning the LLD from the ground up. Two different channels are configured for transfers. Memory Protection provides restricted access to different memory spaces within the device. When this “data” is ready to be copied to memory, a sync event is sent to the DMA and the DMA copies the data from the peripheral register to a memory buffer independent of the CPU.
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EDMA3 Keystone SoC Devices – ppt download
LLD is included e. Processor SDK can be downloaded from the appropriate device location:. Its further available for download as a separate component.
For DMA channels, a trigger event may be an external event, manual write to the event set register, or chained event.
EDMA3 LLD 01.11.03 Release Notes
These registers control EDMA3 resource mapping and provide debug visibility and error tracking information. For technical support please post your questions at http: Navigation menu Personal tools Log in Request account.
The event that is generated can be used to generate interrupt to a CPU or for chaining see below. How do the source and destination addresses update?
EDMA FAQ for OMAPL13x Cx devices – Texas Instruments Wiki
In this mode, the channel controller would generate the TCC internally, which indicates the transfer is said to be complete but the actual data transfer would be still in progress. Set the params for the transfers. sdma3
The best way to learn how to use the LLD is to download the pdf file shown below and work through the examples. Linking is the process of “reloading” a channel’s peripheral configuration registers or buffer descriptor with another set after the first transfer is done.
For example, when channel X is complete, maybe you’d like to transfer the same thing again. ACNT specifies the number of bytes in an “element”.
EDMA3 Keystone SoC Devices
The DMA is configured to respond to sync events from peripherals – i. This discussion should provide a quick introduction to these topics, then conclude with a series of examples that progressively demonstrate more-and-more of the LLD and EDMA3 capabilities.
Views Read View source View history. McBSP tied to a codec. Before channel transfer starts, the PaRam that is decice with the channel is loaded into the TC. The channel registers including DMA, QDMA, and interrupt registers are accessible via the global channel region address range, or in the shadow n channel region address ranges.
Linking two or more channels together allows the EDMA to auto-reload a new configuration when the current transfer is complete. This page was last modified on 21 Marchat Note that even though a new PaRam is loaded into the edja3, no new transfer starts until a there is a new trigger to the channel.
The set of PaRams gives the user the devlce to pre-configure multiple transfer parameters during initialization to minimize application execution time. The EDMA3 also allows for “linking” and “chaining” capabilities.
The objective of dsvice below tutorial to analyze LLD examples for basic transfers, interrupt generation, linking, channel sorting, chaining, etc. Note that StarterWare is available only for subset of Sitara devices. This is the “minimum” transfer size. If the SAM or DAM bit is set to 1, the corresponding source or destination address stays constant throughout the transfer.