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Altera_Forum's avatar
Altera_Forum
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9 years ago

DMA Controller Burs t Mode ... can it be enabled by software

Hi Team,

I have been using the DMA Controller for several years and have Burst and Non-Burst use cases ... to date , I have had two separate configurations but since I have space in the Stratix, I am implementing two controllers , one synthesized for Burst mode enabled and the other with Burst mode not enabled.

Am I missing some software control that will allow a Burst mode DMA controller to support Non-Burst mode ?

Thanks in Advance,

Bob.

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    The embedded IP user guide describes how this all works. In short, yes the DMA controllers support burst mode but registers need to be set to control everything.

  • Altera_Forum's avatar
    Altera_Forum
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    9 years ago

    --- Quote Start ---

    The embedded IP user guide describes how this all works. In short, yes the DMA controllers support burst mode but registers need to be set to control everything.

    --- Quote End ---

    Galfonz, thanks for the info. I have been using the "DMA Controller Core" for several years with Burst Mode enabled as well as not enabled.

    I am familiar with the Embedded Peripheral IP User Guide and checked the latest UG-010852016.05.03., Chapter 23.

    ..... The question above was not if the "DMA Controller Core" supported Burst Mode , but if once Burst Mode was enabled as a parameter "Enable Burst Transfers", was the behavior controllable by software . If it is controllable via Software, I can combine one two FPGA configurations into one and have the driver select Burst Mode.

    The workaround I am trying is to instantiate two DMA Controllers one for Burst Mode and one for non Burst Mode to support both use cases.

    Thanks, Bob