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Altera_Forum's avatar
Altera_Forum
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15 years ago

DMA transfer inside ISR: Problem

Hi everybody, I think this is a common issue, but I didn't find a solution to my question, so hopefully I will get an answer here: I have a DMA controller which I want to use on an IRQ com...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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and IOADDR_ALTERA_AVALON_UART_TXDATA(SERIAL_UART_BASE) give me the address: 0x2903464

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That's the correct address. I am using the same for my DMA->UART transfer which works pretty fine. Take this address, because calling IOADDR_ALTERA_AVALON_UART_TXDATA(SERIAL_UART_BASE) gives you the correct address.

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IOWR_ALTERA_AVALON_DMA_CONTROL(DMA_BASE, 0x289);

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I think you forgot to set I_EN in the control register? Set it and try again.