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25 lines
1.1 KiB
Python
25 lines
1.1 KiB
Python
# CPU frequency scaling example.
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#
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# This example shows how to use the cpufreq module to change the CPU frequency on the fly.
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import sensor, image, time, cpufreq
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sensor.reset() # Reset and initialize the sensor.
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sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE)
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sensor.set_framesize(sensor.QVGA) # Set frame size to QVGA (320x240)
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clock = time.clock() # Create a clock object to track the FPS.
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def test_image_processing():
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for i in range(0, 50):
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clock.tick() # Update the FPS clock.
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img = sensor.snapshot() # Take a picture and return the image.
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img.find_edges(image.EDGE_CANNY, threshold=(50, 80))
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print("\nFrequency Scaling Test...")
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for f in cpufreq.get_supported_frequencies():
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print("Testing CPU Freq: %dMHz..." %(f))
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cpufreq.set_frequency(f)
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clock.reset()
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test_image_processing()
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freqs = cpufreq.get_current_frequencies()
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print("CPU Freq:%dMHz HCLK:%dMhz PCLK1:%dMhz PCLK2:%dMhz FPS:%.2f" %(freqs[0], freqs[1], freqs[2], freqs[3], clock.fps()))
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