Added TRX test over UDP

The idea is to simulate the RF channel by a UDP “connection” between two
hosts.

tmp/test_trx_over_udp.grc

@@ -0,0 +1,324 @@
+options:
+  parameters:
+    author: ''
+    category: '[GRC Hier Blocks]'
+    cmake_opt: ''
+    comment: ''
+    copyright: ''
+    description: ''
+    gen_cmake: 'On'
+    gen_linking: dynamic
+    generate_options: qt_gui
+    hier_block_src_path: '.:'
+    id: rf_trx_over_udp
+    max_nouts: '0'
+    output_language: python
+    placement: (0,0)
+    qt_qss_theme: ''
+    realtime_scheduling: ''
+    run: 'True'
+    run_command: '{python} -u {filename}'
+    run_options: prompt
+    sizing_mode: fixed
+    thread_safe_setters: ''
+    title: ''
+    window_size: (1500,800)
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [8, 8]
+    rotation: 0
+    state: enabled
+
+blocks:
+- name: MTU
+  id: variable
+  parameters:
+    comment: ''
+    value: '1000'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [375, 11]
+    rotation: 0
+    state: enabled
+- name: center_freq
+  id: variable
+  parameters:
+    comment: ''
+    value: 434.1e6
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [862, 11]
+    rotation: 0
+    state: enabled
+- name: device
+  id: variable
+  parameters:
+    comment: ''
+    value: '"soapy=0,driver=hackrf"'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [591, 11]
+    rotation: 0
+    state: enabled
+- name: io_rate
+  id: variable
+  parameters:
+    comment: ''
+    value: 2.4e6
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [758, 11]
+    rotation: 0
+    state: enabled
+- name: offset_freq
+  id: variable
+  parameters:
+    comment: ''
+    value: 200e3
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [960, 16]
+    rotation: 0
+    state: enabled
+- name: samp_rate
+  id: variable
+  parameters:
+    comment: ''
+    value: 300e3
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [7, 83]
+    rotation: 0
+    state: enabled
+- name: blocks_null_sink_0
+  id: blocks_null_sink
+  parameters:
+    affinity: ''
+    alias: ''
+    bus_structure_sink: '[[0,],]'
+    comment: ''
+    num_inputs: '1'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [544, 136.0]
+    rotation: 0
+    state: true
+- name: blocks_tuntap_pdu_0
+  id: blocks_tuntap_pdu
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    ifn: hamnet70
+    istunflag: 'True'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    mtu: MTU
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [584, 324.0]
+    rotation: 0
+    state: enabled
+- name: blocks_udp_sink_0
+  id: blocks_udp_sink
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    eof: 'False'
+    ipaddr: 192.168.23.110
+    port: '1234'
+    psize: '1472'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1088, 316.0]
+    rotation: 0
+    state: true
+- name: blocks_udp_source_0
+  id: blocks_udp_source
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    eof: 'False'
+    ipaddr: 0.0.0.0
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    port: '1234'
+    psize: '1472'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [88, 316.0]
+    rotation: 0
+    state: true
+- name: hamnet70_demod_sc16qam_0
+  id: hamnet70_demod_sc16qam
+  parameters:
+    MTU: MTU
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samp_rate: 300e3
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [280, 280.0]
+    rotation: 0
+    state: enabled
+- name: hamnet70_mod_sc16qam_0
+  id: hamnet70_mod_sc16qam
+  parameters:
+    MTU: MTU
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samp_rate: samp_rate
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [824, 332.0]
+    rotation: 0
+    state: enabled
+- name: import_0
+  id: import
+  parameters:
+    alias: ''
+    comment: ''
+    imports: from gnuradio.digital.utils import tagged_streams
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [167, 11]
+    rotation: 0
+    state: enabled
+- name: import_0_0
+  id: import
+  parameters:
+    alias: ''
+    comment: ''
+    imports: import random
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [167, 59]
+    rotation: 0
+    state: disabled
+- name: import_0_0_0
+  id: import
+  parameters:
+    alias: ''
+    comment: ''
+    imports: import numpy as np
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [271, 59]
+    rotation: 0
+    state: disabled
+- name: qtgui_sink_x_0
+  id: qtgui_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    bw: samp_rate
+    comment: ''
+    fc: '0'
+    fftsize: '1024'
+    gui_hint: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    name: '"TX Baseband"'
+    plotconst: 'True'
+    plotfreq: 'True'
+    plottime: 'True'
+    plotwaterfall: 'True'
+    rate: '10'
+    showports: 'True'
+    showrf: 'False'
+    type: complex
+    wintype: firdes.WIN_BLACKMAN_hARRIS
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1088, 156.0]
+    rotation: 0
+    state: enabled
+- name: qtgui_sink_x_0_0
+  id: qtgui_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    bw: samp_rate
+    comment: ''
+    fc: '0'
+    fftsize: '1024'
+    gui_hint: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    name: '"RX Baseband"'
+    plotconst: 'True'
+    plotfreq: 'True'
+    plottime: 'True'
+    plotwaterfall: 'True'
+    rate: '10'
+    showports: 'True'
+    showrf: 'False'
+    type: complex
+    wintype: firdes.WIN_BLACKMAN_hARRIS
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [656, 156.0]
+    rotation: 0
+    state: enabled
+
+connections:
+- [blocks_tuntap_pdu_0, pdus, hamnet70_mod_sc16qam_0, packet_in]
+- [blocks_udp_source_0, '0', hamnet70_demod_sc16qam_0, '0']
+- [hamnet70_demod_sc16qam_0, '0', blocks_null_sink_0, '0']
+- [hamnet70_demod_sc16qam_0, '1', qtgui_sink_x_0_0, '0']
+- [hamnet70_demod_sc16qam_0, pdu_out, blocks_tuntap_pdu_0, pdus]
+- [hamnet70_mod_sc16qam_0, '0', blocks_udp_sink_0, '0']
+- [hamnet70_mod_sc16qam_0, '0', qtgui_sink_x_0, '0']
+
+metadata:
+  file_format: 1