Re: [Discuss-gnuradio] NetBSD

[Eric Blossom]

On Sat, Dec 02, 2006 at 03:02:54PM -0800, Jordan Hayes wrote:
> >> usb_control_msg failed: error sending control message: Input/output
> >> error
> >
> >I haven't tracked this down, but I'd be interested in fixing it.  I
> >suspect it's either something missing in NetBSD or some OS-dependent
> >code that isn't properly abstracted.  I think it might be coming from
> >libusb, but I really don't know - the error message is a bit lame.  If
> >you can figure out the call chain that results in the error (perhaps
> >with ktrace on the simplest program that provokes it), that would be
> >helpful.
> 
> Ok, I put a few printfs in there.  You're right: the error message comes 
> from libusb, but the "usb_control_msg" part comes from 
> usrp/host/lib/usrp_prims.cc in the function write_cmd() and the args are 
> rType=8 val=87 index=0 len=1 and so that's VRQ_I2C_WRITE so i'm gonna 
> guess that this is the usrp_eeprom_write() call that includes this code:

I doubt it's coming from  usrp_eeprom_write() since almost nobody
calls that.  Depending on the daughterboard, it could be code that's
setting up the daughterboard.

To find out for sure, set a breakpoint with gdb and get a backtrace.

Eric