kopia lustrzana https://github.com/micropython/micropython
35 wiersze
972 B
Python
35 wiersze
972 B
Python
# This is an example on how to access accelerometer on
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# PyBoard directly using I2C bus. As such, it's more
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# intended to be an I2C example, rather than accelerometer
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# example. For the latter, using pyb.Accel class is
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# much easier.
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from machine import Pin
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from machine import I2C
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import time
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# Accelerometer needs to be powered on first. Even
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# though signal is called "AVDD", and there's separate
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# "DVDD", without AVDD, it won't event talk on I2C bus.
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accel_pwr = Pin("MMA_AVDD")
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accel_pwr.value(1)
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i2c = I2C(1, baudrate=100000)
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addrs = i2c.scan()
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print("Scanning devices:", [hex(x) for x in addrs])
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if 0x4C not in addrs:
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print("Accelerometer is not detected")
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ACCEL_ADDR = 0x4C
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ACCEL_AXIS_X_REG = 0
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ACCEL_MODE_REG = 7
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# Now activate measurements
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i2c.mem_write(b"\x01", ACCEL_ADDR, ACCEL_MODE_REG)
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print("Try to move accelerometer and watch the values")
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while True:
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val = i2c.mem_read(1, ACCEL_ADDR, ACCEL_AXIS_X_REG)
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print(val[0])
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time.sleep(1)
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