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72 lines
1.7 KiB
Python
72 lines
1.7 KiB
Python
# SPI Control
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#
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# This example shows how to use the SPI bus on your OpenMV Cam to directly
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# the LCD shield without using the built-in lcd shield driver. You will need
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# the LCD shield to run this example.
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import sensor, image, time
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from pyb import Pin, SPI
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cs = Pin("P3", Pin.OUT_OD)
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rst = Pin("P7", Pin.OUT_PP)
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rs = Pin("P8", Pin.OUT_PP)
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# The hardware SPI bus for your OpenMV Cam is always SPI bus 2.
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spi = SPI(2, SPI.MASTER, baudrate=int(1000000000/66), polarity=0, phase=0)
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def write_command_byte(c):
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cs.low()
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rs.low()
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spi.send(c)
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cs.high()
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def write_data_byte(c):
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cs.low()
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rs.high()
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spi.send(c)
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cs.high()
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def write_command(c, *data):
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write_command_byte(c)
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if data:
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for d in data: write_data_byte(d)
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def write_image(img):
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cs.low()
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rs.high()
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spi.send(img)
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cs.high()
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# Reset the LCD.
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rst.low()
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time.sleep(100)
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rst.high()
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time.sleep(100)
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write_command(0x11) # Sleep Exit
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time.sleep(120)
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# Memory Data Access Control
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write_command(0x36, 0xC0)
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# Interface Pixel Format
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write_command(0x3A, 0x05)
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# Display On
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write_command(0x29)
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sensor.reset() # Initialize the camera sensor.
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sensor.set_pixformat(sensor.RGB565) # must be this
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sensor.set_framesize(sensor.QQVGA2) # must be this
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sensor.skip_frames(time = 2000) # Let new settings take affect.
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clock = time.clock() # Tracks FPS.
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while(True):
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clock.tick() # Track elapsed milliseconds between snapshots().
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img = sensor.snapshot() # Take a picture and return the image.
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write_command(0x2C) # Write image command...
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write_image(img)
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print(clock.fps()) # Note: Your OpenMV Cam runs about half as fast while
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# connected to your computer. The FPS should increase once disconnected.
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