I am using Intel DE2i-150 board where I have Intel atom processor with yocto os and fpga with Nios II processor. I am trying to access the fpga board from yocto. Initially I was able to communicate but due to some other installation now the PCIE_open is not working and it is giving me an error: "Counld not open device". This phrase is not anywhere defined in my code. I have used the driver code also but ended up with the same error. Previously it was working. I have no idea what is going on. Please help me regarding this.
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I have installed jason-c, bdwgc, autogen, expat, gmp, guile, libffi, libiconv, libtool, libunistring, libsndfile, lib_atomic_ops, and tried pulse-audio but it was not successful. Before these installations the PCIE_open was working. – Diya Feb 24 '15 at 06:00
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Is the `dmesg` command available to you? If not, is anything populated in /var/log/dmesg by /etc/init.d/dmesg.sh? The dmesg output or file should have kernel debug messages which might give you a clue. – Greg Feb 24 '15 at 14:29
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Yes dmesg is available. But it is not showing me any debug message or error message. It is initializing the cgroup subsys debug and debug port declaration is done. – Diya Feb 25 '15 at 04:09
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Last message it is showing: alt_up_pci 0000:01:00.0: irq 48 for MSI/MSI-X. alt_up_pci bar 0 and bar 2 are also initialized. Is it possible that due to other installation some setting has been changed? – Diya Feb 25 '15 at 04:39
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How about lspci? Can you ascertain the address of the FPGA to see if it is recognized in dmesg output? If you don't see it, maybe the FPGA is fried. – Greg Feb 26 '15 at 14:45
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It was my mistake. In alt_up_pci_lib.c the device name was alt_up_pci0 and I was trying to open alt_up_pci. That is why the error was coming.
Diya
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