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Altera_Forum
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12 years ago

system.h missing /dev/dma_0, but DMA device is in the top.socpinfo file

I have a working FPGA design with PCIe + DMA + JTAG_UART + NIOS II + Internal Memory. I have been asked to move to a HAL design for the the C code running on NIOS II. I have got to the po...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Slacker, you may have nailed it ...

I was thinking of adding soem other dev that was not dma to see it just DMA was not in the dev list .

I checked the DMA read master port with respect to the NIOS II data port and it wasn't connected.

I will conect it and re-try to see it I can open the /dev/dma_0 and that it appears in system.h

BTW can you say what devices will appear in the llist of devices .. I saw an empty list as the next pointed to

the head and the associated string was NULL. It looks like the JTAGUART , Timer etc... don't need to be opened to

use .. does that imply that they don't show up in the dev list .

Thanks for the help.

Bob.