Re: [Discuss-gnuradio] How to convert from message to complex/float

[Tom Rondeau]

On Tue, May 6, 2014 at 2:54 AM, Hoang Ngo Khac <address@hidden> wrote:

Hi Tom, and all,

I've had a look at PDU to Tagged Stream block. 

Regarding to adding tags, both this block and Burst Tagger contains add_item_tag() function. Which block inserts the main stream tags? I don't quite under stand what Burst Tagger does since it contains both add_item_tag() and get_tags_in_range() function.

Thanks,

Hoang

Have a read of:

http://gnuradio.org/doc/doxygen/page_stream_tags.html

That will hopefully give you a better understanding of the tags.

Tom

 

On Tue, Apr 29, 2014 at 9:23 PM, Tom Rondeau <address@hidden> wrote:

On Tue, Apr 29, 2014 at 2:50 AM, Hoang Ngo Khac <address@hidden> wrote:

Dear List,

I'm beginning with gr-mac. (https://github.com/jmalsbury/gr-mac). I need complex/float data to process but some blocks give message as output (Tagged Stream to PDU). I did try using Message Source to convert form message to complex but there was error with the ID:
NameError: global name 'blocks_message_soure_0_msgg_in' is not defined

Also, PDU to Tagged Stream takes message as input. The Message Sink was used but the similar error happened:

Am I right using Message Source and Message Sink? If yes, how could I fix these error? If no, which blocks should be used?

Thanks,

Hoang

Take a look into the gmsk_radio hier_block used in simple_trx.grc. You can see how the PDU messages are converted to streams of samples. That should help you out with what you might want to do.

Tom

--

Hoang Ngo-Khac

Vietnam National University, Hanoi (VNU-H)

Univ. of Engineering and Technology (UET)

Faculty of Electronics and Telecommunications (FET)

Alternative email:  address@hidden

Mobilephone:  +84.163.682.7874

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