openmv/scripts/examples/10-Arduino-Boards/Nicla-Vision/02-Audio/micro_speech.py
iabdalkader 0648071141 ports/stm32: Fix microspeech demo.
- Need to poll events to schedule the audio callback after switching
from pendsv.
- Fixes #1904
2023-09-25 12:38:13 +02:00

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Python

# MicroSpeech demo.
#
# Download the pre-trained Yes/No model from here:
# https://raw.githubusercontent.com/iabdalkader/microspeech-yesno-model/main/model.tflite
# Save the model to storage, reset and run the example.
import audio
import time
import tf
import micro_speech
import pyb
labels = ["Silence", "Unknown", "Yes", "No"]
led_red = pyb.LED(1)
led_green = pyb.LED(2)
model = tf.load("/model.tflite")
speech = micro_speech.MicroSpeech()
audio.init(channels=1, frequency=16000, gain=24, highpass=0.9883)
# Start audio streaming
audio.start_streaming(speech.audio_callback)
while True:
# Run micro-speech without a timeout and filter detections by label index.
idx = speech.listen(model, timeout=0, threshold=0.70, filter=[2, 3])
led = led_green if idx == 2 else led_red
print(labels[idx])
for i in range(0, 4):
led.on()
time.sleep_ms(25)
led.off()
time.sleep_ms(25)
# Stop streaming
audio.stop_streaming()