Hi all !
Who knows how to display mux value ?
print “mux =”,
hex(usrp.determine_rx_mux_value(self.u,options.rx_subdev_spec))
displays negative values, for example -0xf0f0f0e
How to interpret negative value ?
and how to interpret 7 digit hex number istead of 8 digit.
regards,
Pawel
(Sorry for sending this twice, Pawel, I forgot to send to list. Also I
corrected a minor error I made)
Hi Pawel-
You’ve probably figured this out by now, but I ran into the same thing
yesterday. Here’s what I did.
in_mux_value = usrp.determine_rx_mux_value(self.usrp_in,
in_dcard_subdev_spec)
print “RX mux value: 0x%08x” % (0xFFFFFFFFL & long(in_mux_value))
self.usrp_in.set_mux(in_mux_value)
The determine_*x_mux_value() method returns a (32 bit) int, but if the
MSB
is set, for example 0xF0F0F0F2, python thinks it’s a negative number,
which
screws up the printing. Cast it to a long and mask off the bottom 32
bits.
Hope that helps.
-Steven