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Nios II Uart with DMA

Altera_Forum
Honored Contributor II
‎04-01-2016 11:31 AM
2,549 Views

In my Nios II system I want to use Uart with DMA. Are there some tutorials or example projects about this topic. 

 

I'm using Quartus 13.0. 

 

Thanks.
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Altera_Forum
Honored Contributor II
‎04-01-2016 09:06 PM
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It doesn't really make sense to use DMA with a UART. A DMA engine doesn't have a mechanism to stop sending and wait for characters to go out, or wait for input characters to be present before transferring data. The FIFO in a standard UART is so small that the time taken to set up a DMA transfer would be greater than the time to fill the FIFO with a sofware loop.

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praveenkumar
Beginner
‎12-20-2020 09:16 PM
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In response to Altera_Forum
are u saying we cant use dma with uart
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praveenkumar
Beginner
‎12-20-2020 09:21 PM
1,358 Views
In response to Altera_Forum

can u help me receiving 24 bytes with uart @2mbps speed.

i tried but it was receiving like first byte at last and last byte at first like that.

how can i overcome this problem

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