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Altera_Forum
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15 years ago

Can't Read Data from Custom componet (Avalon mm)

I had associated a custom component (A variation of the DCFIFO example available in AN 473) to my NIOS 2 System. I use the Avalon MM (Slave) Interface whit the current signals: Readdata (32bits...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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Which DMA controller is it? Altera provides drivers with C functions that you can use to configure the DMA.

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It's altera avalon DMA. Configuration of SOPC is shown in the figure. Can I access it like this, (where IMM_x, is the image of my custom made design)

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alt_dma_txchan txchan;

void* tx_data_to = IMM_X_BASE; //is it correct???????

alt_dma_txchan_ioctl(txchan, ALT_DMA_SET_MODE_32, NULL);

alt_dma_txchan_ioctl(txchan, ALT_DMA_TX_ONLY_ON, tx_data_to);

alt_dma_txchan_ioctl(txchan, ALT_DMA_RX_ONLY_OFF, NULL);

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