Re: [Discuss-gnuradio] NetBSD

[Jordan Hayes]

> >  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:

 // The simplest thing that could possibly work:
 //   all writes are single byte writes.
 //
 // We could speed this up using the page write feature,
 // but we write so infrequently, why bother...

 while (len-- > 0){
   cmd[0] = eeprom_offset++;
   cmd[1] = *p++;
   bool r = usrp_i2c_write (udh, i2c_addr, cmd, sizeof (cmd));
   mdelay (10);                // delay 10ms worst case write time
   if (!r)
     return false;
 }

That's a single byte write ...

Now: why this is failing and the rest of everything still works, that's 
up to someone else ...

/jordan