Re: [Discuss-gnuradio] Message Passing

[Activecat]

On Wed, May 14, 2014 at 4:26 PM, Martin Braun <address@hidden> wrote:

On 14.05.2014 08:11, Activecat wrote:

Dear gurus,

I am learning gnuradio Message Passing feature, but couldn't get
desirable result.
The Message seems published successfully, but not subscribed by the
Message receiver.
How to correct the error ..?

Just to make sure: You did connect the ports in your flow graph?
That said, I've seen something like this recently. Maybe there's a bug... needs investigating.
M

Both blocks (message sender block, message receiver block) are source blocks, both are directly connected to the inputs of a divider blocks,  i.e. the message receiver block is not at the downstream of the message sender block.  I guess this is ok because Message Passing is for downstream blocks to communicate to upstream blocks. Is this correct?

This is part of the top_block.py generated by GRC, to illustrate the flowgraph.

        ##################################################
        # Blocks
        ##################################################
        self.blocks_head_0 = blocks.head(gr.sizeof_int*1, 10)
        self.blocks_divide_xx_0 = blocks.divide_ii(1)
        self.activecat_message_source1_0 = activecat.message_source1()
        self.activecat_message_sink1_0 = activecat.message_sink1()
        self.activecat_integer_sink3_0 = activecat.integer_sink3(False, True, "Integer1")

        ##################################################
        # Connections
        ##################################################
        self.connect((self.blocks_divide_xx_0, 0), (self.blocks_head_0, 0))
        self.connect((self.blocks_head_0, 0), (self.activecat_integer_sink3_0, 0))
        self.connect((self.activecat_message_source1_0, 0), (self.blocks_divide_xx_0, 0))
        self.connect((self.activecat_message_sink1_0, 0), (self.blocks_divide_xx_0, 1))

System info:

Gnuradio version = 3.7.3

OS =  Debian jessie/sid, SMP Debian 3.13.10-1 x86_64 GNU/Linux