[Discuss-gnuradio] Couple USRP code questions

[David Carr]

I've just ported quite a bit of the USRP code to the SSRP.  Its gone 
remarkably well thus far thanks to Matt and Eric's well written and 
portable code.  Way to go guys.  I have two current issues however and I 
was wondering if anyone could shed some light on them.

I ported over test_fusb and its dependencies (usrp_prims.*,etc) however 
the call to usb_claim_interface in ssrp_open_rx_interface always fails.  
I have the FX2 loaded with firmware that has EP6 set as an IN BULK 512 
byte endpoint.  I can read data from it using fx2_programmer 
successfully.  This call seems fairly straightforward to me, what might 
I be doing wrong?  [My current development tarball is at 
http://oscar.dcarr.org/ssrp/software/firmware/ssrp-0.2.0.tar.gz for more 
details]. Is the interface argument anything more than a unique number?  
I clearly need to read up on libusb...

Secondly,
When I try to build my configure.in, which uses the USRP macro 
USRP_LIBUSB, autoconf barfs this up:
autoconf: Undefined macros:
***BUG in Autoconf--please report*** AC_LANG_PUSH
***BUG in Autoconf--please report*** AC_LANG_POP

here's a copy of my configure.in
AC_INIT
AM_CONFIG_HEADER(config.h)
AM_INIT_AUTOMAKE(ssrp,0.2.0)
AC_PATH_PROGS(FX2P,fx2_programmer)
AC_PROG_CC
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_LIBTOOL

#USRP_LIBUSBDAVID //FIXME dirty hack
USRP_LIBUSB
USRP_SET_FUSB_TECHNIQUE

# Define where to look for USRP includes
USRP_INCLUDES='-I$(top_srcdir)/host/lib -I$(top_srcdir)/firmware/include'
AC_SUBST(USRP_INCLUDES)

#
USRP_DEFINES=''
AC_SUBST(USRP_DEFINES)

STD_DEFINES_AND_INCLUDES="$DEFINES $USRP_INCLUDES"
AC_SUBST(STD_DEFINES_AND_INCLUDES)


AC_OUTPUT(Makefile            \
     config/Makefile        \
     firmware/Makefile        \
     firmware/include/Makefile    \
     firmware/src/Makefile        \
     firmware/src/ioA/Makefile    \
     host/Makefile            \
     host/apps/Makefile        \
     host/lib/Makefile
     )

Thanks for the help,
David Carr