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Altera_Forum
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17 years ago

Altera PCI Express Development Kit: Linux DMA Driver

Hi, I am a newbie to FPGA design and implementation. While installing the PCI express board on LINUX machine, I don't see Demo application driver for DMA read and write for LINUX (Manual talk...
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Altera_Forum
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16 years ago

hi all,

i'm trying to write a custom driver based on the altpciechdma example. i saw the following lines of code:

/* soft-reset DMA write engine */

iowrite32(0x0000ffffUL, &write_header->w0);

/* soft-reset DMA read engine */

iowrite32(0x0000ffffUL, &read_header->w0);

my driver works when i perform these actions and it doesn't work if i don't. i'm wondering how you figured this out as i didn't find such a reset command in the documentation of the chaining dma design example.

thanks in advance,

carlos