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: transmit
    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: Arduino Serial Transmitter
    window_size: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [70, 37]
    rotation: 0
    state: enabled

blocks:
- name: sample_rate_hz
  id: variable
  parameters:
    comment: ''
    value: '1195'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [670, 313]
    rotation: 0
    state: enabled
- name: analog_sig_source_x_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '1'
    comment: ''
    freq: '10'
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: sample_rate_hz
    type: byte
    waveform: analog.GR_SQR_WAVE
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [70, 187]
    rotation: 0
    state: true
- name: blocks_throttle_0
  id: blocks_throttle
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    ignoretag: 'True'
    maxoutbuf: '0'
    minoutbuf: '0'
    samples_per_second: sample_rate_hz
    type: byte
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [649, 177]
    rotation: 0
    state: bypassed
- name: qtgui_time_raster_sink_x_0
  id: qtgui_time_raster_sink_x
  parameters:
    affinity: ''
    alias: ''
    alpha1: '1.0'
    alpha10: '1.0'
    alpha2: '1.0'
    alpha3: '1.0'
    alpha4: '1.0'
    alpha5: '1.0'
    alpha6: '1.0'
    alpha7: '1.0'
    alpha8: '1.0'
    alpha9: '1.0'
    axislabels: 'True'
    color1: '2'
    color10: '0'
    color2: '0'
    color3: '0'
    color4: '0'
    color5: '0'
    color6: '0'
    color7: '0'
    color8: '0'
    color9: '0'
    comment: ''
    grid: 'False'
    gui_hint: ''
    label1: ''
    label10: ''
    label2: ''
    label3: ''
    label4: ''
    label5: ''
    label6: ''
    label7: ''
    label8: ''
    label9: ''
    mult: '[]'
    name: '""'
    ncols: int(sample_rate_hz)
    nconnections: '1'
    nrows: '60'
    offset: '[]'
    samp_rate: sample_rate_hz
    type: byte
    update_time: '0.10'
    zmax: '1'
    zmin: '0'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [1091, 145]
    rotation: 0
    state: true
- name: serial_sink_block
  id: epy_block
  parameters:
    _source_code: "import ctypes\nimport ctypes.util\nimport time\n\nimport gnuradio.gr\n\
      import numpy\nimport serial\n\n_LIBC_NAME = ctypes.util.find_library(\"c\")\n\
      if not _LIBC_NAME:\n    raise Exception(\"couldn't find libc\")\n_LIBC = ctypes.CDLL(_LIBC_NAME)\n\
      \n\nclass _Timespec(ctypes.Structure):\n    # pylint: disable=too-few-public-methods\n\
      \    \"\"\"\n    > struct timespec {\n    >     time_t tv_sec;        /* seconds\
      \ */\n    >     long   tv_nsec;       /* nanoseconds */\n    > };\n\n    > The\
      \ value of the nanoseconds field must be in the range 0 to 999999999.\n    \"\
      \"\"\n    _fields_ = [(\"tv_sec\", ctypes.c_uint32), (\"tv_nsec\", ctypes.c_long)]\n\
      \n\n_NANOSLEEP = _LIBC.nanosleep\n_NANOSLEEP.argtypes = [ctypes.POINTER(_Timespec),\
      \ ctypes.POINTER(_Timespec)]\n_NANOSLEEP.restype = ctypes.c_int\n\n\nclass SerialSinkBlock(gnuradio.gr.basic_block):\n\
      \    _SLEEP_THRESHOLD_NS = 10000\n\n    def __init__(self, port=\"/dev/ttyUSB0\"\
      , baud_rate=115200, sample_rate_hz=1000):\n        gnuradio.gr.basic_block.__init__(\n\
      \            self, name=\"Serial Sink Block\", in_sig=[numpy.uint8], out_sig=None\n\
      \        )\n        self._serial_port = serial.Serial(\n            port=port,\
      \ baudrate=baud_rate, bytesize=serial.EIGHTBITS\n        )\n        self._tick_interval_ns\
      \ = int(1e9 / sample_rate_hz)\n        # periodically return from .general_work()\
      \ to handle signals\n        self._work_max_samples = max(int(sample_rate_hz\
      \ * 2), 1)\n        self._next_tick_time_ns = None\n        self._libc = ctypes.CDLL(ctypes.util.find_library(\"\
      c\"))\n\n    def general_work(self, input_items, output_items) -> int:\n   \
      \     # pylint: disable=unused-argument\n        if not self._next_tick_time_ns:\n\
      \            self._next_tick_time_ns = time.perf_counter_ns()\n        for byte\
      \ in input_items[0][: self._work_max_samples]:\n            while (\n      \
      \          self._next_tick_time_ns - time.perf_counter_ns()\n            ) >\
      \ self._SLEEP_THRESHOLD_NS:\n                _NANOSLEEP(\n                 \
      \   _Timespec(\n                        0,\n                        # negative\
      \ values make nanosleep return -1\n                        min(\n          \
      \                  self._next_tick_time_ns\n                            - time.perf_counter_ns()\n\
      \                            - self._SLEEP_THRESHOLD_NS,\n                 \
      \           999999999,\n                        ),\n                    ),\n\
      \                    None,\n                )\n            while (self._next_tick_time_ns\
      \ - time.perf_counter_ns()) > 0:\n                pass\n            self._serial_port.write(b\"\
      \\x01\" if byte else b\"\\0\")\n            self._next_tick_time_ns += self._tick_interval_ns\n\
      \        self.consume(0, min(len(input_items[0]), self._work_max_samples))\n\
      \        return 0\n"
    affinity: ''
    alias: ''
    baud_rate: '115200'
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    port: '"/dev/ttyUSB0"'
    sample_rate_hz: sample_rate_hz
  states:
    _io_cache: ('Serial Sink Block', 'SerialSinkBlock', [('port', "'/dev/ttyUSB0'"),
      ('baud_rate', '115200'), ('sample_rate_hz', '1000')], [('0', 'byte', 1)], [],
      '', [])
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [625, 417]
    rotation: 0
    state: enabled

connections:
- [analog_sig_source_x_0, '0', blocks_throttle_0, '0']
- [analog_sig_source_x_0, '0', serial_sink_block, '0']
- [blocks_throttle_0, '0', qtgui_time_raster_sink_x_0, '0']

metadata:
  file_format: 1