GNU Radio
Intro to GNU Radio Companion
"""
Keyboard CW keyer block
Outputs 1.0 when SPACE is pressed, else 0.0
"""
import numpy as np
from gnuradio import gr
from pynput import keyboard
class blk(gr.sync_block):
"""
Keyboard CW Keyer
"""
def __init__(self):
gr.sync_block.__init__(
self,
name="Keyboard CW Keyer",
in_sig=None,
out_sig=[np.float32],
)
self.state = 0.0
listener = keyboard.Listener(
on_press=self.on_press, on_release=self.on_release
)
listener.daemon = True
listener.start()
def on_press(self, key):
if key == keyboard.Key.space:
self.state = 1.0
def on_release(self, key):
if key == keyboard.Key.space:
self.state = 0.0
def work(self, input_items, output_items):
out = output_items[0]
out[:] = self.state
return len(out)