EDMA3 LOW LEVEL DRIVER

Registration Forgot your password? How do you program this transfer? More on Processes Chapter 3. Much time was spent working through each example and learning the LLD from the ground up. Source and destination addresses are fairly obvious.

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Regions restrict access to the channels from the peripheral masters. The elvel way to learn how to use the LLD is to download the pdf file shown below and work through the examples. ACNT specifies the number of bytes in an “element”.

By the way, David and Mike, thanks for the information on the cache functions.

When I run this project I get a transfer complete interrupt, but nothing is transferred. This example includes synchronization, linking, and sorting. I hope you won’t mind if I ask you a related question. Explores the channel sorting features of the EDMA3. The DMA is configured to respond to sync events from peripherals – i.

Transfers from the EMIF interface are not very efficient.

Programming the EDMA3 using the Low-Level Driver (LLD) – Texas Instruments Wiki

Ramamurthy1 Process Description and Control B. How do you program this transfer?

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Source address Destination address Length or size What options might be useful to perform the transfer? Similar to linking, but rather than reloading the same channel, another channel is triggered to run.

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. If you are a TI Employee and require Edit ability please contact x from the company directory.

[meta-ti] [PATCH] edma3-lld: add new recipe for edma3 low level driver

A simple asynchronous transfer; akin to a memcpy. The crossbar to the EMIF is not great. BCNT or any 1. Lfvel is included e.

EDMA3 Keystone SoC Devices

Share buttons are a little bit lower. Typically we would use a FIFO of or words, so you’d get interrupted every or words. Using Indexing Remember this example? If it will provide you with what you need, it’s probably a much faster path to a solution.

[meta-ti] [PATCH] edma3-lld: add new recipe for edma3 low level driver

Write data from DSP to memory. To accomplish this, we created a structure to pass the transfer requirements to the various now more generic functions. In your case, that’d be about 64 or microseconds 16 or 32 four-microsecond sample times. Create and open the EDMA3 instance. Since you have obviously had a lot of experience using DMA, do you think it is worth the trouble in this case?

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My presentations Profile Feedback Log out. The cache uses “cache lines” which are bytes long, so if you don’t align your buffers, you can end up trashing adjacent data when you flush or invalidate your cache.

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This hardware peripheral exists on most of the new Application Processors designed by Texas Instruments TI in the last few years. Let me know if that is helpful.