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Altera_Forum's avatar
Altera_Forum
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21 years ago

dma code problem

Hello, First I tried the DMA code example from the sw datasheet. Than I used the single line codes. I see the DMA register working and status on 0x800020 changing. But somehow the sent ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Two suggestions:

1) Clear the DMA control register before doing anything else:

IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_0_BASE, 0);

(This ensures that the DMA init code within the HAL won't interfere with your operation).

2) Double-check that the DMA write master is connected to the slave at address 0x00800000.