[uClinux-dev] m68k-bdm-elf-gdb device open failed (post again)

Goodman, Brad bgoodman at empirix.com
Fri Aug 5 23:35:48 EDT 2005

I think you may have to do a "depmod -ae" after copying in the module, to have it added to all the modules.dep files. After that, I think insmod would reconize it.

Is there actually a /dev/bdmcf0 file?  ls -l /dev/bdmcf0

Do the major/minor number match that in /proc/devices?

Hope these tips help...


-----Original Message-----
From: uclinux-dev-bounces at uclinux.org on behalf of John Raz
Sent: Fri 8/5/2005 11:10 PM
To: uClinux development list
Subject: [uClinux-dev] m68k-bdm-elf-gdb device open failed (post again)
I am trying to debug my ColdFire5282 with m68k-bdm-elf-gdb.

I followed the instructions from page

They are a little out of date but the actual driver download at
http://www.sourceforge.net/projects/bdm/ has more up to date instructions.

I am using Fedora Core 3. I created the /dev/bdmcf0 entry, make the
linux-2.6 driver bdm.ko, and build the libs and user apps.

1. The first problem is that the driver
    #make install (as root)
doesn't seem to do anything. I would expect
    # insmod bdm.ko
to find the module but it does not. I tried copying it manually to
/lib/modules/2.6.11-1.27_FC3/kernel/drivers/char but it still didn't
find it. I ended up doing insmod from the driver directory and it loads
it and it shows up with lsmod and I see the bdm_init_module line in

2. The real problem is that when I try m68k-bdm-elf-gdb it cannot open
the device. I have the M5282Lite board connected to the parallel port,
powered on. I have created the /dev/bdmcf0 char 34, 4 device. The test
    [raz at work1 test]$ ./bdm-chk /dev/bdmcf0
    BDM Check for Coldfire processors.
    Device: /dev/bdmcf0
    trying kernel driver: /dev/bdmcf0
    trying bdm server: localhost:/dev/bdmcf0
    bdm-remote:open: localhost:6543:/dev/bdmcf0 failed
    Open failed: No such device or address
Any ideas on what I'm missing?

Any and all help is appreciated

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