Kinetis K26: lack of documentation about eDMA burst feature

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Kinetis K26: lack of documentation about eDMA burst feature

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silentlab54
Contributor III

Hi,

I'm studying the eDMA peripheral of the Kinetis K26 microcontroller on the K26 Sub-Family Reference Manual (Document Number: K26P169M180SF5RM Rev. 3, 04/2017).

I encountered a lack of documentation about the eDMA burst feature; the reference manual describes this feature only on page 553, which is the section related to the explanation of the register DMA_TCDn_ATTR.

Do you have more information about how the eDMA burst is made in hardware and how could be used in conjunction with other peripherals? (Flexbus, etc).

Thanks in advance for your answers.

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silentlab54
Contributor III
Hi,
 
I will try to explain the question in another way:
 
Is it possible to use eDMA with Flexbus (Flexbus is the source peripheral) by setting up as indicated the following registers?
  • DMA_TCDn_ATTR[SSIZE] = 100 (16-byte burst
  • FB_CSCRn[PS] = 01 (8-bit port size)
  • FB_CSCRn[BSTR] = 1 (Burst-Read Enabled.)
If the configuration is possible and correct, how is working the eDMA peripheral in this condition?
 
Thanks in advance for your support.
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miduo
NXP Employee
NXP Employee

Hi,

Sorry for that the document is not so helpful. Regarding the eDMA burst feature, we had document & sample code provided based on K60/K70, which can been used as a reference.

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