Message Strobe: Difference between revisions
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Takes a PMT message and sends it out every milliseconds. Useful for testing/debugging the message system. | Takes a PMT message and sends it out every milliseconds. Useful for testing/debugging the message system. | ||
== Parameters == | == Parameters == | ||
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; Message PMT (''R'') | ; Message PMT (''R'') | ||
: The message to send as a PMT. | : The message to send as a PMT. For example, the following message creates a payload of a simple vector of 16 bytes that contains all 1's. | ||
pmt.cons(pmt.PMT_NIL, pmt.make_u8vector(16, 0xFF)) | |||
; Period (ms) (''R'') | ; Period (ms) (''R'') | ||
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== Example Flowgraph == | == Example Flowgraph == | ||
=== Example 1 === | |||
In this example, a Message Strobe block sends the string "Demo" once per second. | In this example, a Message Strobe block sends the string "Demo" once per second. | ||
[[File:PUB_SUB_msg_demo.png]] | [[File:PUB_SUB_msg_demo.png]] | ||
=== Example 2 === | |||
In another example, we change the frequency of a signal source to 1kHz after 5 seconds. | In another example, we change the frequency of a signal source to 1kHz after 5 seconds. | ||
[[File:Signal_source_freq_msg_port.PNG]] | [[File:Signal_source_freq_msg_port.PNG]] | ||
The message strobe settings in the above example are as follows: | The message strobe settings in the above example are as follows: | ||
[[File:Message_strobe_settings.PNG | 400px]] | [[File:Message_strobe_settings.PNG | 400px]] | ||
=== Example 3 === | |||
Another example that uses a Message Strobe block can be found in [https://github.com/gnuradio/gnuradio/blob/master/gr-blocks/examples/msg_passing gr-blocks/examples/msg_passing]. | |||
== Source Files == | == Source Files == | ||
; C++ files | ; C++ files | ||
: [https://github.com/gnuradio/gnuradio/blob/ | : [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/lib/message_strobe_impl.cc] | ||
; Header files | ; Header files | ||
: [https://github.com/gnuradio/gnuradio/blob/ | : [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/lib/message_strobe_impl.h] | ||
; Public header files | ; Public header files | ||
: [https://github.com/gnuradio/gnuradio/blob/ | : [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/include/gnuradio/blocks/message_strobe.h] | ||
; Block definition | ; Block definition | ||
: [https://github.com/gnuradio/gnuradio/blob/ | : [https://github.com/gnuradio/gnuradio/blob/main/gr-blocks/grc/blocks_message_strobe.block.yml] | ||
Latest revision as of 13:39, 6 May 2024
Send message at defined interval.
Takes a PMT message and sends it out every milliseconds. Useful for testing/debugging the message system.
Parameters
(R): Run-time adjustable
- Message PMT (R)
- The message to send as a PMT. For example, the following message creates a payload of a simple vector of 16 bytes that contains all 1's.
pmt.cons(pmt.PMT_NIL, pmt.make_u8vector(16, 0xFF))
- Period (ms) (R)
- The specified time interval after which data is sent at the output repeatedly.
Example Flowgraph
Example 1
In this example, a Message Strobe block sends the string "Demo" once per second.
Example 2
In another example, we change the frequency of a signal source to 1kHz after 5 seconds.
The message strobe settings in the above example are as follows:
Example 3
Another example that uses a Message Strobe block can be found in gr-blocks/examples/msg_passing.
Source Files
- C++ files
- [1]
- Header files
- [2]
- Public header files
- [3]
- Block definition
- [4]