Re: Monitor O's and U's from Python

[Marcus Müller]

Hi Richard, hi Marcus,

huh, surprising; Piotr Krysik's commit 94fddb6371264c79969c0448c19fdb637d6ffc31 added these in 2018, back in the days when we've had tagged 3.8tech-preview. So, that *really* should be in there. Let me quickly spin up a retro machine with 3.8 on it and check that.

Best,

Marcus

    On 23.04.23 03:33, Marcus D. Leech wrote:

On 22/04/2023 21:25, Richard Bell wrote:

Thanks for catching that Marcus. 

I'm still having a problem even finding an output message port for the usrp_source block. I should say I'm using gnuradio 3.8.5, if that makes a difference.

For example, if I print self.uhd_usrp_source.message_ports_in() I get "command" and "system". But if I print self.uhd_usrp_source.message_ports_out() I get an empty tuple.Are output message ports on usrp sources somewhat new?

They must be really new, because I'm running GR 3.10 with UHD 4.1.0.5 and there's no output message port.

On Sat, Apr 22, 2023 at 7:07 AM Marcus D. Leech <patchvonbraun@gmail.com> wrote:

On 22/04/2023 01:46, Richard Bell wrote:

Hi Marcus,

Good to hear from you, I hope all is well. Thanks for this response.

I tried doing what you said, but I get the attached error message. I have been looking the docs but haven't found much discussion that is helping. Do you see anything wrong with these relevant code snippets?

# create the USRP source

self.uhd_usrp_source_0 = uhd.usrp_source(
            ",".join((addr0, "", "master_clock_rate=200e6")),
            uhd.stream_args(
                cpu_format="fc32",
                args='',
                channels=list(range(0,1)),
     ),
)

# create the message debug block

self.message_debug_block = blocks.message_debug()

# connect the usrps async_msgs port to the message debug blocks store port

self.connect((self.uhd_usrp_source, 'async_msgs'), (self.message_debug_block, 'store'))

I think you should be using msg_connect, rather than "connect".