Hi everyone! I have a GNURadio project running on Kubuntu 14.04 using GNURadio Companion v3.7.2.1 along with several OOT blocks that I wrote. (I know I'm a bit behind on the releases.) A lot of the code was originally written in v3.6 so some of what follows may be me conflating old interface with newer.
I have custom hardware that uses Ettus USRP boards. I've been bypassing the custom front-end and just adjusting the expected center frequency on the UHD: USRP Source block but now I'd like to actually control the hardware. That means I'd like to access the write_eo() and write_io() calls so I can enable and initialize the output pins on the USRP and write to an external PLL LO for down conversion to set frequency. My 3.6-based code just called write_io from the usrp instance in C++ code. But I can't figure out how to get to the USRP write_eo and write_io calls from a 3.7.2.1 GNURadio Companion starting point. I've tried adding code to the Python output of GRC like this: ### self.u = uhd.usrp_source( device_addr="fpga=usrp1_fpga_4rx.rbf", stream_args=uhd.stream-args(cpu_format="fc32", channels=range(4),),) # I added this line to GNURadio Companion output code self.u.write_oe (1, 0xFFFF, 0xFFFF) ### but Python can't find the write_oe or write_io methods. Am I missing an import in Python? A path? Is there anyway to do this in the GRC blocks so I don't have to modify the output Python? Do I have to do this as an OOT block and call the uhd usrp make myself? (although I don't see the write_io or write_oe methods in usrp_source.h anymore) Thanks in advance, Kathy Hertzog
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