On 06/07/2011 12:16 PM, Brenden Smith wrote:
I guess there's a search function for a reason; I have found a similar
question in the archives and I believe I have found a suitable answer.
Sorry for the waste of time.
There are no stupid questions, only stupid answers :-)
There are 16 general-purpose I/O lines for each of TX and RX on a
daughtercard, although in *many* instances, some of these are
chewed up by internal functions.
For the WBX, J15 carries GPIO signals on the granddaughter board. The
signals it carries are:
o GPIO - RX4-7 and RX14,15
o GPIO - TX5 and TX8-15
As well as AUX_DAC_C_RX and AUX_DAC_A_RX
For other daughtercards, the GPIOs that are available for use vary quite
a bit, and you have to be *very* careful not to change GPIO
settings for pins other than the ones that are freely-available.
The GPIO control functions in UHD are described here:
http://www.ettus.com/uhd_docs/doxygen/html/classuhd_1_1usrp_1_1dboard__iface.html
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