Re: [Discuss-gnuradio] accessing memory address + file sink problem

[Tom Rondeau]

harshal jadhav wrote:
> Hi Eric,
>  
>  I have a very small problem but I am not able to figure that out. I 
> need to have access to the samples of the signal source so that I can 
> use them for further processing such as picking up 2 samples and 
> mapping them to a complex symbol. But what I understand from the 
> Signal Source code is that it returns a pointer since whenever I try 
> to print the variable containing the signal source it prints a random 
> memory address. Is it possible to access the samples of the signal source.
> I have a problem regarding file sink too. I cannot understand the 
> extension i need to give while saving the file in the file sink. If i 
> save it as a python file or text file, both occasions it fails to  open.
>  
> Regards,
> Harshal

The files are written as binary samples, not ASCII. You have to read 
them in as binary values. There are a number of programs in the source 
code, like the gr_plot_* in gr-utils and some Matlab/Octave files in 
gnuradio-core/src/utils that show you how you can read files in.

There are also a number of messages on the listserv that address this 
question that you can go back and search for.

Tom