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Altera_Forum's avatar
Altera_Forum
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17 years ago

DMA controller in SOP buidler question

I'm using SOPC Builder to integrate into my system v8.0 sp1. * A new DSP builder component with 2 Avalon Slave (Read & write Fifo's) * 2 DMA controller (Avalon master) to load data to the dsp...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi Jake,

I've been surfing in the NIOS software development handbook to find the HAL API in order to launch transaction of data by using Avalon DMA Controller.

Load data to DSP block by Master write DMA 

tx = alt_dma_txchan_open ("/dev/dma_0"))
alt_dma_txchan_prepare (tx, buffer, 1024, dma_done, NULL)

store data from DSP block by Master Read DMA 

rx = alt_dma_rxchan_open ("/dev/dma_0"))
alt_dma_rxchan_prepare (rx, buffer, 1024, dma_done, NULL)

By using these functions I don't need to know the base address of my DSP block if I have it well connected to the both DMA masters, in such case, Do I'll need always a pair of master DMA controller for each DSP block??