Message_Example.grc

<?xml version='1.0' encoding='utf-8'?>
<?grc format='1' created='3.7.11'?>
<flow_graph>
  <timestamp>Mon Sep  5 11:56:00 2016</timestamp>
  <block>
    <key>options</key>
    <param>
      <key>author</key>
      <value>Aaron Scher</value>
    </param>
    <param>
      <key>window_size</key>
      <value></value>
    </param>
    <param>
      <key>category</key>
      <value>[GRC Hier Blocks]</value>
    </param>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>description</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(8, 8)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>generate_options</key>
      <value>qt_gui</value>
    </param>
    <param>
      <key>hier_block_src_path</key>
      <value>.:</value>
    </param>
    <param>
      <key>id</key>
      <value>top_block</value>
    </param>
    <param>
      <key>max_nouts</key>
      <value>0</value>
    </param>
    <param>
      <key>qt_qss_theme</key>
      <value></value>
    </param>
    <param>
      <key>realtime_scheduling</key>
      <value></value>
    </param>
    <param>
      <key>run_command</key>
      <value>{python} -u {filename}</value>
    </param>
    <param>
      <key>run_options</key>
      <value>prompt</value>
    </param>
    <param>
      <key>run</key>
      <value>True</value>
    </param>
    <param>
      <key>thread_safe_setters</key>
      <value></value>
    </param>
    <param>
      <key>title</key>
      <value>Messaging Example</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(8, 160)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>value</key>
      <value>32000</value>
    </param>
  </block>
  <block>
    <key>blks2_tcp_source</key>
    <param>
      <key>addr</key>
      <value>127.0.0.1</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(144, 300)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>blks2_tcp_source_0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>server</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>int</value>
    </param>
    <param>
      <key>port</key>
      <value>5000</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
  </block>
  <block>
    <key>blocks_message_debug</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(968, 160)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>blocks_message_debug_0</value>
    </param>
  </block>
  <block>
    <key>blocks_null_sink</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>bus_conns</key>
      <value>[[0,],]</value>
    </param>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(576, 24)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>blocks_null_sink_0</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>num_inputs</key>
      <value>1</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
  </block>
  <block>
    <key>blocks_null_source</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>bus_conns</key>
      <value>[[0,],]</value>
    </param>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(168, 24)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>blocks_null_source_0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>num_outputs</key>
      <value>1</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
  </block>
  <block>
    <key>blocks_throttle</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>comment</key>
      <value>II inclued this throttle block to avoid the warning about
including throttle blocks (to avoid CPU congestion for 
cases with no audio or RF hardware blocks).</value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(304, 20)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>blocks_throttle_0</value>
    </param>
    <param>
      <key>ignoretag</key>
      <value>True</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>samples_per_second</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
  </block>
  <block>
    <key>epy_block</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_io_cache</key>
      <value>('Embedded Python Block', 'msg_block', [], [('msg_in', 'message', 1)], [('msg_out', 'message', 1)], 'This block converts strings from the QT GUI Message Edit Box to uint8 vectors', [])</value>
    </param>
    <param>
      <key>_source_code</key>
      <value>"""
Embedded Python Blocks:

Each time this file is saved, GRC will instantiate the first class it finds
to get ports and parameters of your block. The arguments to __init__  will
be the parameters. All of them are required to have default values!
"""

import numpy as np
import pylab
from gnuradio import gr
import pmt


class msg_block(gr.basic_block):  # other base classes are basic_block, decim_block, interp_block
    """This block converts strings from the QT GUI Message Edit Box to uint8 vectors"""

    def __init__(self):  # only default arguments here
        """arguments to this function show up as parameters in GRC"""
        gr.basic_block.__init__(
            self,
            name='Embedded Python Block',   # will show up in GRC
            in_sig=None,
            out_sig=None
        )
        self.message_port_register_out(pmt.intern('msg_out'))
        self.message_port_register_in(pmt.intern('msg_in'))
        self.set_msg_handler(pmt.intern('msg_in'), self.handle_msg)
    
    def handle_msg(self, msg):
        nvec = pmt.to_python(msg)
        self.message_port_pub(pmt.intern('msg_out'), pmt.cons(pmt.make_dict(), pmt.pmt_to_python.numpy_to_uvector(np.array([ord(c) for c in nvec], np.uint8))))
    
    def work(self, input_items, output_items):
        pass
</value>
    </param>
    <param>
      <key>comment</key>
      <value>Double click on this block and click on "open in 
editor" to see the Python code.
This block converts strings from the QT GUI Message 
Edit Box to uint8 vectors</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(368, 160)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>epy_block_0</value>
    </param>
  </block>
  <block>
    <key>epy_block</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_io_cache</key>
      <value>('Int to String', 'msg_block', [], [('msg_in', 'message', 1)], [('msg_out', 'message', 1)], 'This block converts strings from the QT GUI Message Edit Box to uint8 vectors', [])</value>
    </param>
    <param>
      <key>_source_code</key>
      <value>"""
Embedded Python Blocks:

Each time this file is saved, GRC will instantiate the first class it finds
to get ports and parameters of your block. The arguments to __init__  will
be the parameters. All of them are required to have default values!
"""

import numpy as np
import pylab
from gnuradio import gr
import pmt


class msg_block(gr.basic_block):  # other base classes are basic_block, decim_block, interp_block
    """This block converts strings from the QT GUI Message Edit Box to uint8 vectors"""

    def __init__(self):  # only default arguments here
        """arguments to this function show up as parameters in GRC"""
        gr.basic_block.__init__(
            self,
            name='Int to String',   # will show up in GRC
            in_sig=None,
            out_sig=None
        )
        self.message_port_register_out(pmt.intern('msg_out'))
        self.message_port_register_in(pmt.intern('msg_in'))
        self.set_msg_handler(pmt.intern('msg_in'), self.handle_msg)
    
    def handle_msg(self, msg):
        nvec = pmt.to_python(msg)
	print("===")
	print(msg)
	print("===")
        self.message_port_pub(pmt.intern('msg_out'), pmt.cons(pmt.make_dict(), pmt.pmt_to_python.numpy_to_uvector(np.array([ord(c) for c in nvec], np.uint8))))
    
    def work(self, input_items, output_items):
        pass
</value>
    </param>
    <param>
      <key>comment</key>
      <value>Double click on this block and click on "open in 
editor" to see the Python code.
This block converts strings from the QT GUI Message 
Edit Box to uint8 vectors</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(352, 344)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>epy_block_0_0</value>
    </param>
  </block>
  <block>
    <key>qtgui_edit_box_msg</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(120, 132)</value>
    </param>
    <param>
      <key>gui_hint</key>
      <value></value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>qtgui_edit_box_msg_0</value>
    </param>
    <param>
      <key>key</key>
      <value></value>
    </param>
    <param>
      <key>label</key>
      <value></value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>is_pair</key>
      <value>False</value>
    </param>
    <param>
      <key>is_static</key>
      <value>False</value>
    </param>
    <param>
      <key>type</key>
      <value>string</value>
    </param>
    <param>
      <key>value</key>
      <value></value>
    </param>
  </block>
  <block>
    <key>qtgui_edit_box_msg</key>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>comment</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_enabled</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(80, 412)</value>
    </param>
    <param>
      <key>gui_hint</key>
      <value></value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
    <param>
      <key>id</key>
      <value>qtgui_edit_box_msg_0_0</value>
    </param>
    <param>
      <key>key</key>
      <value></value>
    </param>
    <param>
      <key>label</key>
      <value></value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>is_pair</key>
      <value>False</value>
    </param>
    <param>
      <key>is_static</key>
      <value>False</value>
    </param>
    <param>
      <key>type</key>
      <value>string</value>
    </param>
    <param>
      <key>value</key>
      <value></value>
    </param>
  </block>
  <connection>
    <source_block_id>blks2_tcp_source_0</source_block_id>
    <sink_block_id>epy_block_0_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>msg_in</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_null_source_0</source_block_id>
    <sink_block_id>blocks_throttle_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_throttle_0</source_block_id>
    <sink_block_id>blocks_null_sink_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>epy_block_0</source_block_id>
    <sink_block_id>blocks_message_debug_0</sink_block_id>
    <source_key>msg_out</source_key>
    <sink_key>print</sink_key>
  </connection>
  <connection>
    <source_block_id>epy_block_0_0</source_block_id>
    <sink_block_id>blocks_message_debug_0</sink_block_id>
    <source_key>msg_out</source_key>
    <sink_key>print</sink_key>
  </connection>
  <connection>
    <source_block_id>qtgui_edit_box_msg_0</source_block_id>
    <sink_block_id>epy_block_0</sink_block_id>
    <source_key>msg</source_key>
    <sink_key>msg_in</sink_key>
  </connection>
  <connection>
    <source_block_id>qtgui_edit_box_msg_0_0</source_block_id>
    <sink_block_id>epy_block_0_0</sink_block_id>
    <source_key>msg</source_key>
    <sink_key>msg_in</sink_key>
  </connection>
</flow_graph>