boards/NICLAV: Make MicroSpeech work on Nicla Vision.

* Add example for Nicla Vision.
* Update example comment.
* Fixes #1756
This commit is contained in:
iabdalkader 2022-12-04 20:30:19 +01:00
parent 1f94aaf828
commit df618ffb02
4 changed files with 36 additions and 2 deletions

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@ -0,0 +1,29 @@
# 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, time, tf, micro_speech, 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 = 0.78, 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()

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@ -1,3 +1,8 @@
# 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, time, tf, micro_speech, pyb
labels = ['Silence', 'Unknown', 'Yes', 'No']

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@ -185,7 +185,7 @@
// Domain 2 DMA buffers region.
#define OMV_DMA_MEMORY_D2 SRAM2
#define OMV_DMA_MEMORY_D2_SIZE (6*1024) // Reserved memory for DMA buffers
#define OMV_DMA_MEMORY_D2_SIZE (4*1024) // Reserved memory for DMA buffers
#define OMV_DMA_REGION_D2_BASE (OMV_SRAM2_ORIGIN+(0*1024))
#define OMV_DMA_REGION_D2_SIZE MPU_REGION_SIZE_16KB

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@ -43,7 +43,7 @@ static DFSDM_Channel_HandleTypeDef hdfsdm;
static DFSDM_Filter_HandleTypeDef hdfsdm_filter[AUDIO_MAX_CHANNELS];
static DMA_HandleTypeDef hdma_filter[AUDIO_MAX_CHANNELS];
// NOTE: placed in D2 memory.
#define PDM_BUFFER_SIZE (512)
#define PDM_BUFFER_SIZE (512 * 2)
int32_t OMV_ATTR_SECTION(OMV_ATTR_ALIGNED(PDM_BUFFER[PDM_BUFFER_SIZE], 32), ".d2_dma_buffer");
#define SaturaLH(N, L, H) (((N)<(L))?(L):(((N)>(H))?(H):(N)))
#else