Re: [Discuss-gnuradio] GMSK Demodulator -- Assertion 'imu>=0" failed.

[Eric Blossom]

On Tue, Feb 05, 2008 at 12:21:37AM -0800, Fasika Alemayehu wrote:
> I am using GNU radio 3.1.1 but I have been using the block blks2. Now I am 
> using blks2impl and the error is gone. But I am now facing a new problem.
> ----------------------------------------------------------------------------------------------------------------------
>  "/usr/local/lib/python2.5/site-packages/gnuradio/gr/basic_flow_graph.py", 
> line 84, in coerce_endpoint
>     raise ValueError, "Not coercible to endpoint: %s" % (x,)
> ValueError: Not coercible to endpoint: <gnuradio.blks2impl.gmsk.gmsk_demod 
> object at 0xb649deac>
> ------------------------------------------------------------------------------------------------------------------

You can't mix flow_graph and blk2.  You should be subclassing
gr.top_block, not gr.flow_graph

> Here is the code:
> 
> from gnuradio import gr
> from gnuradio.blks2impl import gmsk
> from optparse import OptionParser
> from gnuradio.eng_option import eng_option
> import struct
> 
> class graph(gr.flow_graph):
> 
>     def __init__(self):
>         gr.flow_graph.__init__(self)
> 
>         filename = '/home/fasika/Desktop/Binary'
>         outputfilename = "demod"
> 
>         self.src = gr.file_source(gr.sizeof_gr_complex, filename)
>         demod = gmsk.gmsk_demod()
>         self.dst = gr.file_sink(gr.sizeof_char, outputfilename)
>         self.connect(self.src, demod, self.dst)
>      
> if __name__ == '__main__':
>     try:
>         graph().run()
>     except KeyboardInterrupt:
>         pass
> 

Eric