I am trying to build a flow graph in GNU Radio Companion consisting of a
USRP source block and a FFT sink. During runtime, I would like to send a
user settings register to the USRP.
Fortunately, everything is already employed so I only need to build some
sort of variable control. By now, that already works out quite well
using the WX GUI Widgets. A user settings command basically be send to
the USRP using the
void set_user_register(const uint8_t addr, const uint32_t data, size_t
mboard)
function that is part of the USRP source block. When changing the two
variables $user_reg_addr and $user_reg_data, GRC invokes the callback
function that I have defined in the file
gnuradio/gr-uhd/grc/gen_uhd_usrp_blocks.py:
<callback>set_user_register(\$user_reg_addr,
\$user_reg_data,uhd.ALL_MBOARDS)</callback>
If I now change either $user_reg_addr or $user_reg_data, the callback
function is executed, which is not intended. In turn, I first would like
to execute the callback function after I have modified *both* variables.
Is there a convenient way to execute the callback function on a button
click or something similar?
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