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Altera_Forum
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14 years ago

uClinux freeze during USB copy - Nios2 nommu - USB Host

Hello, I did a no mmu niosII platform with uClinux booting (test-nios2 branch). I use an Open Core USB Host. I can read and write in a USB Key. But I have a problem. When I copy a file ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Hello,

I use 64 Mbytes of SDRAM. I use "cp" to copy from the USB Key to USB Key.

I tried with "dd" with different size of blocks. But it's the same. When 20 Mbytes are transfered, uClinux freezes.

With the command "free", I saw the field "buffers" : when I make a copy from USB Key to USB key, the size of "buffers" increases but never decreases...

I saw that there is an option during the kernel configuration : "kernel log buffer size" but I don't know how to calculate the real size of the buffers.

When I make a copy from SDRAM to SDRAM this size dosen't move.

Thank you for your help.

Best regards.

Pierre