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Re: (gnuradio3.8) module 'gnuradio.blocks' has no attribute 'message_sin
From: |
Marcus Müller |
Subject: |
Re: (gnuradio3.8) module 'gnuradio.blocks' has no attribute 'message_sink' |
Date: |
Fri, 15 Jan 2021 10:09:42 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 |
So, the old msg_queue infrastructure of GNU Radio has been removed, yes.
A suitable replacement are the asynchronous message passing blocks.
Depending on your use case, the conversion of your code should be
relatively straightforward - the message debug sink might even do what
you want.
Best regards,
Marcus
On 07.01.21 04:46, Ting Wu wrote:
> Hi!
>
> I recently upgraded to gnuradio 3.8 and my old code threw the following
> error:
>
> module 'gnuradio.blocks' has no attribute 'message_sink'
>
> Is the 'message_sink' has been deprecated in the recent version of
> gnuradio? If so, what should I use now for the message source and sink?
> I really do not want to rewrite all the codes, so I would be really
> grateful if there is a simple way to make the following code work with
> the recent version of gnuradio. The code simply gets data stream from a
> USRP N200 (LFRX daughterboard).
>
> =================================================
> class my_block(gr.top_block):
> def __init__(self):
> gr.top_block.__init__(self)
> self.source = uhd.usrp_source(device_addr="",
> stream_args=uhd.stream_args('sc16', 'sc16', args="scalar=1024"))
>
> self.source.set_samp_rate(samp_rate)
> self.source.set_gain(gain)
> self.source.set_center_freq(0)
>
> self.queue = gr.msg_queue()
> self.sink = blocks.message_sink(gr.sizeof_short*2, self.queue,
> False) #This line throws the error
> self.connect(self.source, self.sink)
> ===================================================
>
> Thanks in advance!
>
> Ting Wu
>
>