This is related to Python, not GNU Radio per se. It seems that you pass in1 to math.log10(). I assume that you define in1 as input_items[1], which is a list of items to process (not a single item), while the log function expects to get a float, not a list.
Something like: for item in in1: c = math.log10(item) should work for you. I guess there's a numpy function that will run the log function on a list more efficiently. On Tue, Jan 2, 2018, 20:10 Tellrell White <[email protected]> wrote: > Hello Guys > > I'm creating a customized block in the GNU Radio framework using python > that takes in a number of input items and once that number of input items > surpasses a certain number, 1024 of the input items are taken and stored > into an array, and then those items are converted to dB and lastly compared > to a threshold value, 5 in this case. If any of the values are greater than > the threshold value, a message is printed indicating a signal is present, > and if none of the values are greater than 5, this is indicated with a > message stating "No signal is present". > > When I run the flow graph which uses this block I get the following error. > > handler caught exception: a float is required > Traceback (most recent call last): > File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/gateway.py", > line 55, in eval > try: self._callback() > File "/usr/local/lib/python2.7/dist-packages/gnuradio/gr/gateway.py", > line 144, in __gr_block_handle > ) for i in self.__out_indexes], > File "/home/tellrell/Ener_detec.py", line 42, in general_work > c = math.log10(in1) #converts 1024 values stored in in1 to dB > and stores them in c > TypeError: a float is required > thread[thread-per-block[8]: <block ED_block (22)>]: caught unrecognized > exception > > > > The .py script for the customized block along with the corresponding .grc > file are attached below. > > Any help would be great. > > Tellrell > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
_______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
